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Remove the files from the SAM4S demo that are copied using the CreateProjectDirectoryStructure.bat batch file.

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Richard Barry 13 years ago
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321
FreeRTOS/Demo/CORTEX_M4_ATSAM4S_Atmel_Studio/src/Common-Demo-Source/BlockQ.c
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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
/*
* Creates six tasks that operate on three queues as follows:
*
* The first two tasks send and receive an incrementing number to/from a queue.
* One task acts as a producer and the other as the consumer. The consumer is a
* higher priority than the producer and is set to block on queue reads. The queue
* only has space for one item - as soon as the producer posts a message on the
* queue the consumer will unblock, pre-empt the producer, and remove the item.
*
* The second two tasks work the other way around. Again the queue used only has
* enough space for one item. This time the consumer has a lower priority than the
* producer. The producer will try to post on the queue blocking when the queue is
* full. When the consumer wakes it will remove the item from the queue, causing
* the producer to unblock, pre-empt the consumer, and immediately re-fill the
* queue.
*
* The last two tasks use the same queue producer and consumer functions. This time the queue has
* enough space for lots of items and the tasks operate at the same priority. The
* producer will execute, placing items into the queue. The consumer will start
* executing when either the queue becomes full (causing the producer to block) or
* a context switch occurs (tasks of the same priority will time slice).
*
*/
/*
Changes from V4.1.1
+ The second set of tasks were created the wrong way around. This has been
corrected.
*/
#include <stdlib.h>
/* Scheduler include files. */
#include "FreeRTOS.h"
#include "task.h"
#include "queue.h"
/* Demo program include files. */
#include "BlockQ.h"
#define blckqSTACK_SIZE configMINIMAL_STACK_SIZE
#define blckqNUM_TASK_SETS ( 3 )
/* Structure used to pass parameters to the blocking queue tasks. */
typedef struct BLOCKING_QUEUE_PARAMETERS
{
xQueueHandle xQueue; /*< The queue to be used by the task. */
portTickType xBlockTime; /*< The block time to use on queue reads/writes. */
volatile short *psCheckVariable; /*< Incremented on each successful cycle to check the task is still running. */
} xBlockingQueueParameters;
/* Task function that creates an incrementing number and posts it on a queue. */
static portTASK_FUNCTION_PROTO( vBlockingQueueProducer, pvParameters );
/* Task function that removes the incrementing number from a queue and checks that
it is the expected number. */
static portTASK_FUNCTION_PROTO( vBlockingQueueConsumer, pvParameters );
/* Variables which are incremented each time an item is removed from a queue, and
found to be the expected value.
These are used to check that the tasks are still running. */
static volatile short sBlockingConsumerCount[ blckqNUM_TASK_SETS ] = { ( unsigned short ) 0, ( unsigned short ) 0, ( unsigned short ) 0 };
/* Variable which are incremented each time an item is posted on a queue. These
are used to check that the tasks are still running. */
static volatile short sBlockingProducerCount[ blckqNUM_TASK_SETS ] = { ( unsigned short ) 0, ( unsigned short ) 0, ( unsigned short ) 0 };
/*-----------------------------------------------------------*/
void vStartBlockingQueueTasks( unsigned portBASE_TYPE uxPriority )
{
xBlockingQueueParameters *pxQueueParameters1, *pxQueueParameters2;
xBlockingQueueParameters *pxQueueParameters3, *pxQueueParameters4;
xBlockingQueueParameters *pxQueueParameters5, *pxQueueParameters6;
const unsigned portBASE_TYPE uxQueueSize1 = 1, uxQueueSize5 = 5;
const portTickType xBlockTime = ( portTickType ) 1000 / portTICK_RATE_MS;
const portTickType xDontBlock = ( portTickType ) 0;
/* Create the first two tasks as described at the top of the file. */
/* First create the structure used to pass parameters to the consumer tasks. */
pxQueueParameters1 = ( xBlockingQueueParameters * ) pvPortMalloc( sizeof( xBlockingQueueParameters ) );
/* Create the queue used by the first two tasks to pass the incrementing number.
Pass a pointer to the queue in the parameter structure. */
pxQueueParameters1->xQueue = xQueueCreate( uxQueueSize1, ( unsigned portBASE_TYPE ) sizeof( unsigned short ) );
/* The consumer is created first so gets a block time as described above. */
pxQueueParameters1->xBlockTime = xBlockTime;
/* Pass in the variable that this task is going to increment so we can check it
is still running. */
pxQueueParameters1->psCheckVariable = &( sBlockingConsumerCount[ 0 ] );
/* Create the structure used to pass parameters to the producer task. */
pxQueueParameters2 = ( xBlockingQueueParameters * ) pvPortMalloc( sizeof( xBlockingQueueParameters ) );
/* Pass the queue to this task also, using the parameter structure. */
pxQueueParameters2->xQueue = pxQueueParameters1->xQueue;
/* The producer is not going to block - as soon as it posts the consumer will
wake and remove the item so the producer should always have room to post. */
pxQueueParameters2->xBlockTime = xDontBlock;
/* Pass in the variable that this task is going to increment so we can check
it is still running. */
pxQueueParameters2->psCheckVariable = &( sBlockingProducerCount[ 0 ] );
/* Note the producer has a lower priority than the consumer when the tasks are
spawned. */
xTaskCreate( vBlockingQueueConsumer, ( signed char * ) "QConsB1", blckqSTACK_SIZE, ( void * ) pxQueueParameters1, uxPriority, NULL );
xTaskCreate( vBlockingQueueProducer, ( signed char * ) "QProdB2", blckqSTACK_SIZE, ( void * ) pxQueueParameters2, tskIDLE_PRIORITY, NULL );
/* Create the second two tasks as described at the top of the file. This uses
the same mechanism but reverses the task priorities. */
pxQueueParameters3 = ( xBlockingQueueParameters * ) pvPortMalloc( sizeof( xBlockingQueueParameters ) );
pxQueueParameters3->xQueue = xQueueCreate( uxQueueSize1, ( unsigned portBASE_TYPE ) sizeof( unsigned short ) );
pxQueueParameters3->xBlockTime = xDontBlock;
pxQueueParameters3->psCheckVariable = &( sBlockingProducerCount[ 1 ] );
pxQueueParameters4 = ( xBlockingQueueParameters * ) pvPortMalloc( sizeof( xBlockingQueueParameters ) );
pxQueueParameters4->xQueue = pxQueueParameters3->xQueue;
pxQueueParameters4->xBlockTime = xBlockTime;
pxQueueParameters4->psCheckVariable = &( sBlockingConsumerCount[ 1 ] );
xTaskCreate( vBlockingQueueConsumer, ( signed char * ) "QConsB3", blckqSTACK_SIZE, ( void * ) pxQueueParameters3, tskIDLE_PRIORITY, NULL );
xTaskCreate( vBlockingQueueProducer, ( signed char * ) "QProdB4", blckqSTACK_SIZE, ( void * ) pxQueueParameters4, uxPriority, NULL );
/* Create the last two tasks as described above. The mechanism is again just
the same. This time both parameter structures are given a block time. */
pxQueueParameters5 = ( xBlockingQueueParameters * ) pvPortMalloc( sizeof( xBlockingQueueParameters ) );
pxQueueParameters5->xQueue = xQueueCreate( uxQueueSize5, ( unsigned portBASE_TYPE ) sizeof( unsigned short ) );
pxQueueParameters5->xBlockTime = xBlockTime;
pxQueueParameters5->psCheckVariable = &( sBlockingProducerCount[ 2 ] );
pxQueueParameters6 = ( xBlockingQueueParameters * ) pvPortMalloc( sizeof( xBlockingQueueParameters ) );
pxQueueParameters6->xQueue = pxQueueParameters5->xQueue;
pxQueueParameters6->xBlockTime = xBlockTime;
pxQueueParameters6->psCheckVariable = &( sBlockingConsumerCount[ 2 ] );
xTaskCreate( vBlockingQueueProducer, ( signed char * ) "QProdB5", blckqSTACK_SIZE, ( void * ) pxQueueParameters5, tskIDLE_PRIORITY, NULL );
xTaskCreate( vBlockingQueueConsumer, ( signed char * ) "QConsB6", blckqSTACK_SIZE, ( void * ) pxQueueParameters6, tskIDLE_PRIORITY, NULL );
}
/*-----------------------------------------------------------*/
static portTASK_FUNCTION( vBlockingQueueProducer, pvParameters )
{
unsigned short usValue = 0;
xBlockingQueueParameters *pxQueueParameters;
short sErrorEverOccurred = pdFALSE;
pxQueueParameters = ( xBlockingQueueParameters * ) pvParameters;
for( ;; )
{
if( xQueueSend( pxQueueParameters->xQueue, ( void * ) &usValue, pxQueueParameters->xBlockTime ) != pdPASS )
{
sErrorEverOccurred = pdTRUE;
}
else
{
/* We have successfully posted a message, so increment the variable
used to check we are still running. */
if( sErrorEverOccurred == pdFALSE )
{
( *pxQueueParameters->psCheckVariable )++;
}
/* Increment the variable we are going to post next time round. The
consumer will expect the numbers to follow in numerical order. */
++usValue;
}
}
}
/*-----------------------------------------------------------*/
static portTASK_FUNCTION( vBlockingQueueConsumer, pvParameters )
{
unsigned short usData, usExpectedValue = 0;
xBlockingQueueParameters *pxQueueParameters;
short sErrorEverOccurred = pdFALSE;
pxQueueParameters = ( xBlockingQueueParameters * ) pvParameters;
for( ;; )
{
if( xQueueReceive( pxQueueParameters->xQueue, &usData, pxQueueParameters->xBlockTime ) == pdPASS )
{
if( usData != usExpectedValue )
{
/* Catch-up. */
usExpectedValue = usData;
sErrorEverOccurred = pdTRUE;
}
else
{
/* We have successfully received a message, so increment the
variable used to check we are still running. */
if( sErrorEverOccurred == pdFALSE )
{
( *pxQueueParameters->psCheckVariable )++;
}
/* Increment the value we expect to remove from the queue next time
round. */
++usExpectedValue;
}
}
}
}
/*-----------------------------------------------------------*/
/* This is called to check that all the created tasks are still running. */
portBASE_TYPE xAreBlockingQueuesStillRunning( void )
{
static short sLastBlockingConsumerCount[ blckqNUM_TASK_SETS ] = { ( unsigned short ) 0, ( unsigned short ) 0, ( unsigned short ) 0 };
static short sLastBlockingProducerCount[ blckqNUM_TASK_SETS ] = { ( unsigned short ) 0, ( unsigned short ) 0, ( unsigned short ) 0 };
portBASE_TYPE xReturn = pdPASS, xTasks;
/* Not too worried about mutual exclusion on these variables as they are 16
bits and we are only reading them. We also only care to see if they have
changed or not.
Loop through each check variable to and return pdFALSE if any are found not
to have changed since the last call. */
for( xTasks = 0; xTasks < blckqNUM_TASK_SETS; xTasks++ )
{
if( sBlockingConsumerCount[ xTasks ] == sLastBlockingConsumerCount[ xTasks ] )
{
xReturn = pdFALSE;
}
sLastBlockingConsumerCount[ xTasks ] = sBlockingConsumerCount[ xTasks ];
if( sBlockingProducerCount[ xTasks ] == sLastBlockingProducerCount[ xTasks ] )
{
xReturn = pdFALSE;
}
sLastBlockingProducerCount[ xTasks ] = sBlockingProducerCount[ xTasks ];
}
return xReturn;
}

585
FreeRTOS/Demo/CORTEX_M4_ATSAM4S_Atmel_Studio/src/Common-Demo-Source/GenQTest.c
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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
/*
* Tests the extra queue functionality introduced in FreeRTOS.org V4.5.0 -
* including xQueueSendToFront(), xQueueSendToBack(), xQueuePeek() and
* mutex behaviour.
*
* See the comments above the prvSendFrontAndBackTest() and
* prvLowPriorityMutexTask() prototypes below for more information.
*/
#include <stdlib.h>
/* Scheduler include files. */
#include "FreeRTOS.h"
#include "task.h"
#include "queue.h"
#include "semphr.h"
/* Demo program include files. */
#include "GenQTest.h"
#define genqQUEUE_LENGTH ( 5 )
#define genqNO_BLOCK ( 0 )
#define genqMUTEX_LOW_PRIORITY ( tskIDLE_PRIORITY )
#define genqMUTEX_TEST_PRIORITY ( tskIDLE_PRIORITY + 1 )
#define genqMUTEX_MEDIUM_PRIORITY ( tskIDLE_PRIORITY + 2 )
#define genqMUTEX_HIGH_PRIORITY ( tskIDLE_PRIORITY + 3 )
/*-----------------------------------------------------------*/
/*
* Tests the behaviour of the xQueueSendToFront() and xQueueSendToBack()
* macros by using both to fill a queue, then reading from the queue to
* check the resultant queue order is as expected. Queue data is also
* peeked.
*/
static void prvSendFrontAndBackTest( void *pvParameters );
/*
* The following three tasks are used to demonstrate the mutex behaviour.
* Each task is given a different priority to demonstrate the priority
* inheritance mechanism.
*
* The low priority task obtains a mutex. After this a high priority task
* attempts to obtain the same mutex, causing its priority to be inherited
* by the low priority task. The task with the inherited high priority then
* resumes a medium priority task to ensure it is not blocked by the medium
* priority task while it holds the inherited high priority. Once the mutex
* is returned the task with the inherited priority returns to its original
* low priority, and is therefore immediately preempted by first the high
* priority task and then the medium prioroity task before it can continue.
*/
static void prvLowPriorityMutexTask( void *pvParameters );
static void prvMediumPriorityMutexTask( void *pvParameters );
static void prvHighPriorityMutexTask( void *pvParameters );
/*-----------------------------------------------------------*/
/* Flag that will be latched to pdTRUE should any unexpected behaviour be
detected in any of the tasks. */
static portBASE_TYPE xErrorDetected = pdFALSE;
/* Counters that are incremented on each cycle of a test. This is used to
detect a stalled task - a test that is no longer running. */
static volatile unsigned portLONG ulLoopCounter = 0;
static volatile unsigned portLONG ulLoopCounter2 = 0;
/* The variable that is guarded by the mutex in the mutex demo tasks. */
static volatile unsigned portLONG ulGuardedVariable = 0;
/* Handles used in the mutext test to suspend and resume the high and medium
priority mutex test tasks. */
static xTaskHandle xHighPriorityMutexTask, xMediumPriorityMutexTask;
/*-----------------------------------------------------------*/
void vStartGenericQueueTasks( unsigned portBASE_TYPE uxPriority )
{
xQueueHandle xQueue;
xSemaphoreHandle xMutex;
/* Create the queue that we are going to use for the
prvSendFrontAndBackTest demo. */
xQueue = xQueueCreate( genqQUEUE_LENGTH, sizeof( unsigned portLONG ) );
/* vQueueAddToRegistry() adds the queue to the queue registry, if one is
in use. The queue registry is provided as a means for kernel aware
debuggers to locate queues and has no purpose if a kernel aware debugger
is not being used. The call to vQueueAddToRegistry() will be removed
by the pre-processor if configQUEUE_REGISTRY_SIZE is not defined or is
defined to be less than 1. */
vQueueAddToRegistry( xQueue, ( signed portCHAR * ) "Gen_Queue_Test" );
/* Create the demo task and pass it the queue just created. We are
passing the queue handle by value so it does not matter that it is
declared on the stack here. */
xTaskCreate( prvSendFrontAndBackTest, ( signed portCHAR * )"GenQ", configMINIMAL_STACK_SIZE, ( void * ) xQueue, uxPriority, NULL );
/* Create the mutex used by the prvMutexTest task. */
xMutex = xSemaphoreCreateMutex();
/* vQueueAddToRegistry() adds the mutex to the registry, if one is
in use. The registry is provided as a means for kernel aware
debuggers to locate mutexes and has no purpose if a kernel aware debugger
is not being used. The call to vQueueAddToRegistry() will be removed
by the pre-processor if configQUEUE_REGISTRY_SIZE is not defined or is
defined to be less than 1. */
vQueueAddToRegistry( ( xQueueHandle ) xMutex, ( signed portCHAR * ) "Gen_Queue_Mutex" );
/* Create the mutex demo tasks and pass it the mutex just created. We are
passing the mutex handle by value so it does not matter that it is declared
on the stack here. */
xTaskCreate( prvLowPriorityMutexTask, ( signed portCHAR * )"MuLow", configMINIMAL_STACK_SIZE, ( void * ) xMutex, genqMUTEX_LOW_PRIORITY, NULL );
xTaskCreate( prvMediumPriorityMutexTask, ( signed portCHAR * )"MuMed", configMINIMAL_STACK_SIZE, NULL, genqMUTEX_MEDIUM_PRIORITY, &xMediumPriorityMutexTask );
xTaskCreate( prvHighPriorityMutexTask, ( signed portCHAR * )"MuHigh", configMINIMAL_STACK_SIZE, ( void * ) xMutex, genqMUTEX_HIGH_PRIORITY, &xHighPriorityMutexTask );
}
/*-----------------------------------------------------------*/
static void prvSendFrontAndBackTest( void *pvParameters )
{
unsigned portLONG ulData, ulData2;
xQueueHandle xQueue;
#ifdef USE_STDIO
void vPrintDisplayMessage( const portCHAR * const * ppcMessageToSend );
const portCHAR * const pcTaskStartMsg = "Queue SendToFront/SendToBack/Peek test started.\r\n";
/* Queue a message for printing to say the task has started. */
vPrintDisplayMessage( &pcTaskStartMsg );
#endif
xQueue = ( xQueueHandle ) pvParameters;
for( ;; )
{
/* The queue is empty, so sending an item to the back of the queue
should have the same efect as sending it to the front of the queue.
First send to the front and check everything is as expected. */
xQueueSendToFront( xQueue, ( void * ) &ulLoopCounter, genqNO_BLOCK );
if( uxQueueMessagesWaiting( xQueue ) != 1 )
{
xErrorDetected = pdTRUE;
}
if( xQueueReceive( xQueue, ( void * ) &ulData, genqNO_BLOCK ) != pdPASS )
{
xErrorDetected = pdTRUE;
}
/* The data we sent to the queue should equal the data we just received
from the queue. */
if( ulLoopCounter != ulData )
{
xErrorDetected = pdTRUE;
}
/* Then do the same, sending the data to the back, checking everything
is as expected. */
if( uxQueueMessagesWaiting( xQueue ) != 0 )
{
xErrorDetected = pdTRUE;
}
xQueueSendToBack( xQueue, ( void * ) &ulLoopCounter, genqNO_BLOCK );
if( uxQueueMessagesWaiting( xQueue ) != 1 )
{
xErrorDetected = pdTRUE;
}
if( xQueueReceive( xQueue, ( void * ) &ulData, genqNO_BLOCK ) != pdPASS )
{
xErrorDetected = pdTRUE;
}
if( uxQueueMessagesWaiting( xQueue ) != 0 )
{
xErrorDetected = pdTRUE;
}
/* The data we sent to the queue should equal the data we just received
from the queue. */
if( ulLoopCounter != ulData )
{
xErrorDetected = pdTRUE;
}
#if configUSE_PREEMPTION == 0
taskYIELD();
#endif
/* Place 2, 3, 4 into the queue, adding items to the back of the queue. */
for( ulData = 2; ulData < 5; ulData++ )
{
xQueueSendToBack( xQueue, ( void * ) &ulData, genqNO_BLOCK );
}
/* Now the order in the queue should be 2, 3, 4, with 2 being the first
thing to be read out. Now add 1 then 0 to the front of the queue. */
if( uxQueueMessagesWaiting( xQueue ) != 3 )
{
xErrorDetected = pdTRUE;
}
ulData = 1;
xQueueSendToFront( xQueue, ( void * ) &ulData, genqNO_BLOCK );
ulData = 0;
xQueueSendToFront( xQueue, ( void * ) &ulData, genqNO_BLOCK );
/* Now the queue should be full, and when we read the data out we
should receive 0, 1, 2, 3, 4. */
if( uxQueueMessagesWaiting( xQueue ) != 5 )
{
xErrorDetected = pdTRUE;
}
if( xQueueSendToFront( xQueue, ( void * ) &ulData, genqNO_BLOCK ) != errQUEUE_FULL )
{
xErrorDetected = pdTRUE;
}
if( xQueueSendToBack( xQueue, ( void * ) &ulData, genqNO_BLOCK ) != errQUEUE_FULL )
{
xErrorDetected = pdTRUE;
}
#if configUSE_PREEMPTION == 0
taskYIELD();
#endif
/* Check the data we read out is in the expected order. */
for( ulData = 0; ulData < genqQUEUE_LENGTH; ulData++ )
{
/* Try peeking the data first. */
if( xQueuePeek( xQueue, &ulData2, genqNO_BLOCK ) != pdPASS )
{
xErrorDetected = pdTRUE;
}
if( ulData != ulData2 )
{
xErrorDetected = pdTRUE;
}
/* Now try receiving the data for real. The value should be the
same. Clobber the value first so we know we really received it. */
ulData2 = ~ulData2;
if( xQueueReceive( xQueue, &ulData2, genqNO_BLOCK ) != pdPASS )
{
xErrorDetected = pdTRUE;
}
if( ulData != ulData2 )
{
xErrorDetected = pdTRUE;
}
}
/* The queue should now be empty again. */
if( uxQueueMessagesWaiting( xQueue ) != 0 )
{
xErrorDetected = pdTRUE;
}
#if configUSE_PREEMPTION == 0
taskYIELD();
#endif
/* Our queue is empty once more, add 10, 11 to the back. */
ulData = 10;
if( xQueueSend( xQueue, &ulData, genqNO_BLOCK ) != pdPASS )
{
xErrorDetected = pdTRUE;
}
ulData = 11;
if( xQueueSend( xQueue, &ulData, genqNO_BLOCK ) != pdPASS )
{
xErrorDetected = pdTRUE;
}
if( uxQueueMessagesWaiting( xQueue ) != 2 )
{
xErrorDetected = pdTRUE;
}
/* Now we should have 10, 11 in the queue. Add 7, 8, 9 to the
front. */
for( ulData = 9; ulData >= 7; ulData-- )
{
if( xQueueSendToFront( xQueue, ( void * ) &ulData, genqNO_BLOCK ) != pdPASS )
{
xErrorDetected = pdTRUE;
}
}
/* Now check that the queue is full, and that receiving data provides
the expected sequence of 7, 8, 9, 10, 11. */
if( uxQueueMessagesWaiting( xQueue ) != 5 )
{
xErrorDetected = pdTRUE;
}
if( xQueueSendToFront( xQueue, ( void * ) &ulData, genqNO_BLOCK ) != errQUEUE_FULL )
{
xErrorDetected = pdTRUE;
}
if( xQueueSendToBack( xQueue, ( void * ) &ulData, genqNO_BLOCK ) != errQUEUE_FULL )
{
xErrorDetected = pdTRUE;
}
#if configUSE_PREEMPTION == 0
taskYIELD();
#endif
/* Check the data we read out is in the expected order. */
for( ulData = 7; ulData < ( 7 + genqQUEUE_LENGTH ); ulData++ )
{
if( xQueueReceive( xQueue, &ulData2, genqNO_BLOCK ) != pdPASS )
{
xErrorDetected = pdTRUE;
}
if( ulData != ulData2 )
{
xErrorDetected = pdTRUE;
}
}
if( uxQueueMessagesWaiting( xQueue ) != 0 )
{
xErrorDetected = pdTRUE;
}
ulLoopCounter++;
}
}
/*-----------------------------------------------------------*/
static void prvLowPriorityMutexTask( void *pvParameters )
{
xSemaphoreHandle xMutex = ( xSemaphoreHandle ) pvParameters;
#ifdef USE_STDIO
void vPrintDisplayMessage( const portCHAR * const * ppcMessageToSend );
const portCHAR * const pcTaskStartMsg = "Mutex with priority inheritance test started.\r\n";
/* Queue a message for printing to say the task has started. */
vPrintDisplayMessage( &pcTaskStartMsg );
#endif
for( ;; )
{
/* Take the mutex. It should be available now. */
if( xSemaphoreTake( xMutex, genqNO_BLOCK ) != pdPASS )
{
xErrorDetected = pdTRUE;
}
/* Set our guarded variable to a known start value. */
ulGuardedVariable = 0;
/* Our priority should be as per that assigned when the task was
created. */
if( uxTaskPriorityGet( NULL ) != genqMUTEX_LOW_PRIORITY )
{
xErrorDetected = pdTRUE;
}
/* Now unsuspend the high priority task. This will attempt to take the
mutex, and block when it finds it cannot obtain it. */
vTaskResume( xHighPriorityMutexTask );
/* We should now have inherited the prioritoy of the high priority task,
as by now it will have attempted to get the mutex. */
if( uxTaskPriorityGet( NULL ) != genqMUTEX_HIGH_PRIORITY )
{
xErrorDetected = pdTRUE;
}
/* We can attempt to set our priority to the test priority - between the
idle priority and the medium/high test priorities, but our actual
prioroity should remain at the high priority. */
vTaskPrioritySet( NULL, genqMUTEX_TEST_PRIORITY );
if( uxTaskPriorityGet( NULL ) != genqMUTEX_HIGH_PRIORITY )
{
xErrorDetected = pdTRUE;
}
/* Now unsuspend the medium priority task. This should not run as our
inherited priority is above that of the medium priority task. */
vTaskResume( xMediumPriorityMutexTask );
/* If the did run then it will have incremented our guarded variable. */
if( ulGuardedVariable != 0 )
{
xErrorDetected = pdTRUE;
}
/* When we give back the semaphore our priority should be disinherited
back to the priority to which we attempted to set ourselves. This means
that when the high priority task next blocks, the medium priority task
should execute and increment the guarded variable. When we next run
both the high and medium priority tasks will have been suspended again. */
if( xSemaphoreGive( xMutex ) != pdPASS )
{
xErrorDetected = pdTRUE;
}
/* Check that the guarded variable did indeed increment... */
if( ulGuardedVariable != 1 )
{
xErrorDetected = pdTRUE;
}
/* ... and that our priority has been disinherited to
genqMUTEX_TEST_PRIORITY. */
if( uxTaskPriorityGet( NULL ) != genqMUTEX_TEST_PRIORITY )
{
xErrorDetected = pdTRUE;
}
/* Set our priority back to our original priority ready for the next
loop around this test. */
vTaskPrioritySet( NULL, genqMUTEX_LOW_PRIORITY );
/* Just to show we are still running. */
ulLoopCounter2++;
#if configUSE_PREEMPTION == 0
taskYIELD();
#endif
}
}
/*-----------------------------------------------------------*/
static void prvMediumPriorityMutexTask( void *pvParameters )
{
( void ) pvParameters;
for( ;; )
{
/* The medium priority task starts by suspending itself. The low
priority task will unsuspend this task when required. */
vTaskSuspend( NULL );
/* When this task unsuspends all it does is increment the guarded
variable, this is so the low priority task knows that it has
executed. */
ulGuardedVariable++;
}
}
/*-----------------------------------------------------------*/
static void prvHighPriorityMutexTask( void *pvParameters )
{
xSemaphoreHandle xMutex = ( xSemaphoreHandle ) pvParameters;
for( ;; )
{
/* The high priority task starts by suspending itself. The low
priority task will unsuspend this task when required. */
vTaskSuspend( NULL );
/* When this task unsuspends all it does is attempt to obtain
the mutex. It should find the mutex is not available so a
block time is specified. */
if( xSemaphoreTake( xMutex, portMAX_DELAY ) != pdPASS )
{
xErrorDetected = pdTRUE;
}
/* When we eventually obtain the mutex we just give it back then
return to suspend ready for the next test. */
if( xSemaphoreGive( xMutex ) != pdPASS )
{
xErrorDetected = pdTRUE;
}
}
}
/*-----------------------------------------------------------*/
/* This is called to check that all the created tasks are still running. */
portBASE_TYPE xAreGenericQueueTasksStillRunning( void )
{
static unsigned portLONG ulLastLoopCounter = 0, ulLastLoopCounter2 = 0;
/* If the demo task is still running then we expect the loopcounters to
have incremented since this function was last called. */
if( ulLastLoopCounter == ulLoopCounter )
{
xErrorDetected = pdTRUE;
}
if( ulLastLoopCounter2 == ulLoopCounter2 )
{
xErrorDetected = pdTRUE;
}
ulLastLoopCounter = ulLoopCounter;
ulLastLoopCounter2 = ulLoopCounter2;
/* Errors detected in the task itself will have latched xErrorDetected
to true. */
return !xErrorDetected;
}

259
FreeRTOS/Demo/CORTEX_M4_ATSAM4S_Atmel_Studio/src/Common-Demo-Source/PollQ.c
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@ -1,259 +0,0 @@
/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
/*
* This version of PollQ. c is for use on systems that have limited stack
* space and no display facilities. The complete version can be found in
* the Demo/Common/Full directory.
*
* Creates two tasks that communicate over a single queue. One task acts as a
* producer, the other a consumer.
*
* The producer loops for three iteration, posting an incrementing number onto the
* queue each cycle. It then delays for a fixed period before doing exactly the
* same again.
*
* The consumer loops emptying the queue. Each item removed from the queue is
* checked to ensure it contains the expected value. When the queue is empty it
* blocks for a fixed period, then does the same again.
*
* All queue access is performed without blocking. The consumer completely empties
* the queue each time it runs so the producer should never find the queue full.
*
* An error is flagged if the consumer obtains an unexpected value or the producer
* find the queue is full.
*/
/*
Changes from V2.0.0
+ Delay periods are now specified using variables and constants of
portTickType rather than unsigned long.
*/
#include <stdlib.h>
/* Scheduler include files. */
#include "FreeRTOS.h"
#include "task.h"
#include "queue.h"
/* Demo program include files. */
#include "PollQ.h"
#define pollqSTACK_SIZE configMINIMAL_STACK_SIZE
#define pollqQUEUE_SIZE ( 10 )
#define pollqPRODUCER_DELAY ( ( portTickType ) 200 / portTICK_RATE_MS )
#define pollqCONSUMER_DELAY ( pollqPRODUCER_DELAY - ( portTickType ) ( 20 / portTICK_RATE_MS ) )
#define pollqNO_DELAY ( ( portTickType ) 0 )
#define pollqVALUES_TO_PRODUCE ( ( signed portBASE_TYPE ) 3 )
#define pollqINITIAL_VALUE ( ( signed portBASE_TYPE ) 0 )
/* The task that posts the incrementing number onto the queue. */
static portTASK_FUNCTION_PROTO( vPolledQueueProducer, pvParameters );
/* The task that empties the queue. */
static portTASK_FUNCTION_PROTO( vPolledQueueConsumer, pvParameters );
/* Variables that are used to check that the tasks are still running with no
errors. */
static volatile signed portBASE_TYPE xPollingConsumerCount = pollqINITIAL_VALUE, xPollingProducerCount = pollqINITIAL_VALUE;
/*-----------------------------------------------------------*/
void vStartPolledQueueTasks( unsigned portBASE_TYPE uxPriority )
{
static xQueueHandle xPolledQueue;
/* Create the queue used by the producer and consumer. */
xPolledQueue = xQueueCreate( pollqQUEUE_SIZE, ( unsigned portBASE_TYPE ) sizeof( unsigned short ) );
/* vQueueAddToRegistry() adds the queue to the queue registry, if one is
in use. The queue registry is provided as a means for kernel aware
debuggers to locate queues and has no purpose if a kernel aware debugger
is not being used. The call to vQueueAddToRegistry() will be removed
by the pre-processor if configQUEUE_REGISTRY_SIZE is not defined or is
defined to be less than 1. */
vQueueAddToRegistry( xPolledQueue, ( signed char * ) "Poll_Test_Queue" );
/* Spawn the producer and consumer. */
xTaskCreate( vPolledQueueConsumer, ( signed char * ) "QConsNB", pollqSTACK_SIZE, ( void * ) &xPolledQueue, uxPriority, ( xTaskHandle * ) NULL );
xTaskCreate( vPolledQueueProducer, ( signed char * ) "QProdNB", pollqSTACK_SIZE, ( void * ) &xPolledQueue, uxPriority, ( xTaskHandle * ) NULL );
}
/*-----------------------------------------------------------*/
static portTASK_FUNCTION( vPolledQueueProducer, pvParameters )
{
unsigned short usValue = ( unsigned short ) 0;
signed portBASE_TYPE xError = pdFALSE, xLoop;
for( ;; )
{
for( xLoop = 0; xLoop < pollqVALUES_TO_PRODUCE; xLoop++ )
{
/* Send an incrementing number on the queue without blocking. */
if( xQueueSend( *( ( xQueueHandle * ) pvParameters ), ( void * ) &usValue, pollqNO_DELAY ) != pdPASS )
{
/* We should never find the queue full so if we get here there
has been an error. */
xError = pdTRUE;
}
else
{
if( xError == pdFALSE )
{
/* If an error has ever been recorded we stop incrementing the
check variable. */
portENTER_CRITICAL();
xPollingProducerCount++;
portEXIT_CRITICAL();
}
/* Update the value we are going to post next time around. */
usValue++;
}
}
/* Wait before we start posting again to ensure the consumer runs and
empties the queue. */
vTaskDelay( pollqPRODUCER_DELAY );
}
} /*lint !e818 Function prototype must conform to API. */
/*-----------------------------------------------------------*/
static portTASK_FUNCTION( vPolledQueueConsumer, pvParameters )
{
unsigned short usData, usExpectedValue = ( unsigned short ) 0;
signed portBASE_TYPE xError = pdFALSE;
for( ;; )
{
/* Loop until the queue is empty. */
while( uxQueueMessagesWaiting( *( ( xQueueHandle * ) pvParameters ) ) )
{
if( xQueueReceive( *( ( xQueueHandle * ) pvParameters ), &usData, pollqNO_DELAY ) == pdPASS )
{
if( usData != usExpectedValue )
{
/* This is not what we expected to receive so an error has
occurred. */
xError = pdTRUE;
/* Catch-up to the value we received so our next expected
value should again be correct. */
usExpectedValue = usData;
}
else
{
if( xError == pdFALSE )
{
/* Only increment the check variable if no errors have
occurred. */
portENTER_CRITICAL();
xPollingConsumerCount++;
portEXIT_CRITICAL();
}
}
/* Next time round we would expect the number to be one higher. */
usExpectedValue++;
}
}
/* Now the queue is empty we block, allowing the producer to place more
items in the queue. */
vTaskDelay( pollqCONSUMER_DELAY );
}
} /*lint !e818 Function prototype must conform to API. */
/*-----------------------------------------------------------*/
/* This is called to check that all the created tasks are still running with no errors. */
portBASE_TYPE xArePollingQueuesStillRunning( void )
{
portBASE_TYPE xReturn;
/* Check both the consumer and producer poll count to check they have both
been changed since out last trip round. We do not need a critical section
around the check variables as this is called from a higher priority than
the other tasks that access the same variables. */
if( ( xPollingConsumerCount == pollqINITIAL_VALUE ) ||
( xPollingProducerCount == pollqINITIAL_VALUE )
)
{
xReturn = pdFALSE;
}
else
{
xReturn = pdTRUE;
}
/* Set the check variables back down so we know if they have been
incremented the next time around. */
xPollingConsumerCount = pollqINITIAL_VALUE;
xPollingProducerCount = pollqINITIAL_VALUE;
return xReturn;
}

506
FreeRTOS/Demo/CORTEX_M4_ATSAM4S_Atmel_Studio/src/Common-Demo-Source/blocktim.c
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@ -1,506 +0,0 @@
/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
/*
* This file contains some test scenarios that ensure tasks do not exit queue
* send or receive functions prematurely. A description of the tests is
* included within the code.
*/
/* Kernel includes. */
#include "FreeRTOS.h"
#include "task.h"
#include "queue.h"
/* Demo includes. */
#include "blocktim.h"
/* Task priorities. Allow these to be overridden. */
#ifndef bktPRIMARY_PRIORITY
#define bktPRIMARY_PRIORITY ( configMAX_PRIORITIES - 3 )
#endif
#ifndef bktSECONDARY_PRIORITY
#define bktSECONDARY_PRIORITY ( configMAX_PRIORITIES - 4 )
#endif
/* Task behaviour. */
#define bktQUEUE_LENGTH ( 5 )
#define bktSHORT_WAIT ( ( ( portTickType ) 20 ) / portTICK_RATE_MS )
#define bktPRIMARY_BLOCK_TIME ( 10 )
#define bktALLOWABLE_MARGIN ( 15 )
#define bktTIME_TO_BLOCK ( 175 )
#define bktDONT_BLOCK ( ( portTickType ) 0 )
#define bktRUN_INDICATOR ( ( unsigned portBASE_TYPE ) 0x55 )
/* The queue on which the tasks block. */
static xQueueHandle xTestQueue;
/* Handle to the secondary task is required by the primary task for calls
to vTaskSuspend/Resume(). */
static xTaskHandle xSecondary;
/* Used to ensure that tasks are still executing without error. */
static volatile portBASE_TYPE xPrimaryCycles = 0, xSecondaryCycles = 0;
static volatile portBASE_TYPE xErrorOccurred = pdFALSE;
/* Provides a simple mechanism for the primary task to know when the
secondary task has executed. */
static volatile unsigned portBASE_TYPE xRunIndicator;
/* The two test tasks. Their behaviour is commented within the files. */
static void vPrimaryBlockTimeTestTask( void *pvParameters );
static void vSecondaryBlockTimeTestTask( void *pvParameters );
/*-----------------------------------------------------------*/
void vCreateBlockTimeTasks( void )
{
/* Create the queue on which the two tasks block. */
xTestQueue = xQueueCreate( bktQUEUE_LENGTH, sizeof( portBASE_TYPE ) );
/* vQueueAddToRegistry() adds the queue to the queue registry, if one is
in use. The queue registry is provided as a means for kernel aware
debuggers to locate queues and has no purpose if a kernel aware debugger
is not being used. The call to vQueueAddToRegistry() will be removed
by the pre-processor if configQUEUE_REGISTRY_SIZE is not defined or is
defined to be less than 1. */
vQueueAddToRegistry( xTestQueue, ( signed char * ) "Block_Time_Queue" );
/* Create the two test tasks. */
xTaskCreate( vPrimaryBlockTimeTestTask, ( signed char * )"BTest1", configMINIMAL_STACK_SIZE, NULL, bktPRIMARY_PRIORITY, NULL );
xTaskCreate( vSecondaryBlockTimeTestTask, ( signed char * )"BTest2", configMINIMAL_STACK_SIZE, NULL, bktSECONDARY_PRIORITY, &xSecondary );
}
/*-----------------------------------------------------------*/
static void vPrimaryBlockTimeTestTask( void *pvParameters )
{
portBASE_TYPE xItem, xData;
portTickType xTimeWhenBlocking;
portTickType xTimeToBlock, xBlockedTime;
( void ) pvParameters;
for( ;; )
{
/*********************************************************************
Test 1
Simple block time wakeup test on queue receives. */
for( xItem = 0; xItem < bktQUEUE_LENGTH; xItem++ )
{
/* The queue is empty. Attempt to read from the queue using a block
time. When we wake, ensure the delta in time is as expected. */
xTimeToBlock = bktPRIMARY_BLOCK_TIME << xItem;
xTimeWhenBlocking = xTaskGetTickCount();
/* We should unblock after xTimeToBlock having not received
anything on the queue. */
if( xQueueReceive( xTestQueue, &xData, xTimeToBlock ) != errQUEUE_EMPTY )
{
xErrorOccurred = pdTRUE;
}
/* How long were we blocked for? */
xBlockedTime = xTaskGetTickCount() - xTimeWhenBlocking;
if( xBlockedTime < xTimeToBlock )
{
/* Should not have blocked for less than we requested. */
xErrorOccurred = pdTRUE;
}
if( xBlockedTime > ( xTimeToBlock + bktALLOWABLE_MARGIN ) )
{
/* Should not have blocked for longer than we requested,
although we would not necessarily run as soon as we were
unblocked so a margin is allowed. */
xErrorOccurred = pdTRUE;
}
}
/*********************************************************************
Test 2
Simple block time wakeup test on queue sends.
First fill the queue. It should be empty so all sends should pass. */
for( xItem = 0; xItem < bktQUEUE_LENGTH; xItem++ )
{
if( xQueueSend( xTestQueue, &xItem, bktDONT_BLOCK ) != pdPASS )
{
xErrorOccurred = pdTRUE;
}
#if configUSE_PREEMPTION == 0
taskYIELD();
#endif
}
for( xItem = 0; xItem < bktQUEUE_LENGTH; xItem++ )
{
/* The queue is full. Attempt to write to the queue using a block
time. When we wake, ensure the delta in time is as expected. */
xTimeToBlock = bktPRIMARY_BLOCK_TIME << xItem;
xTimeWhenBlocking = xTaskGetTickCount();
/* We should unblock after xTimeToBlock having not received
anything on the queue. */
if( xQueueSend( xTestQueue, &xItem, xTimeToBlock ) != errQUEUE_FULL )
{
xErrorOccurred = pdTRUE;
}
/* How long were we blocked for? */
xBlockedTime = xTaskGetTickCount() - xTimeWhenBlocking;
if( xBlockedTime < xTimeToBlock )
{
/* Should not have blocked for less than we requested. */
xErrorOccurred = pdTRUE;
}
if( xBlockedTime > ( xTimeToBlock + bktALLOWABLE_MARGIN ) )
{
/* Should not have blocked for longer than we requested,
although we would not necessarily run as soon as we were
unblocked so a margin is allowed. */
xErrorOccurred = pdTRUE;
}
}
/*********************************************************************
Test 3
Wake the other task, it will block attempting to post to the queue.
When we read from the queue the other task will wake, but before it
can run we will post to the queue again. When the other task runs it
will find the queue still full, even though it was woken. It should
recognise that its block time has not expired and return to block for
the remains of its block time.
Wake the other task so it blocks attempting to post to the already
full queue. */
xRunIndicator = 0;
vTaskResume( xSecondary );
/* We need to wait a little to ensure the other task executes. */
while( xRunIndicator != bktRUN_INDICATOR )
{
/* The other task has not yet executed. */
vTaskDelay( bktSHORT_WAIT );
}
/* Make sure the other task is blocked on the queue. */
vTaskDelay( bktSHORT_WAIT );
xRunIndicator = 0;
for( xItem = 0; xItem < bktQUEUE_LENGTH; xItem++ )
{
/* Now when we make space on the queue the other task should wake
but not execute as this task has higher priority. */
if( xQueueReceive( xTestQueue, &xData, bktDONT_BLOCK ) != pdPASS )
{
xErrorOccurred = pdTRUE;
}
/* Now fill the queue again before the other task gets a chance to
execute. If the other task had executed we would find the queue
full ourselves, and the other task have set xRunIndicator. */
if( xQueueSend( xTestQueue, &xItem, bktDONT_BLOCK ) != pdPASS )
{
xErrorOccurred = pdTRUE;
}
if( xRunIndicator == bktRUN_INDICATOR )
{
/* The other task should not have executed. */
xErrorOccurred = pdTRUE;
}
/* Raise the priority of the other task so it executes and blocks
on the queue again. */
vTaskPrioritySet( xSecondary, bktPRIMARY_PRIORITY + 2 );
/* The other task should now have re-blocked without exiting the
queue function. */
if( xRunIndicator == bktRUN_INDICATOR )
{
/* The other task should not have executed outside of the
queue function. */
xErrorOccurred = pdTRUE;
}
/* Set the priority back down. */
vTaskPrioritySet( xSecondary, bktSECONDARY_PRIORITY );
}
/* Let the other task timeout. When it unblockes it will check that it
unblocked at the correct time, then suspend itself. */
while( xRunIndicator != bktRUN_INDICATOR )
{
vTaskDelay( bktSHORT_WAIT );
}
vTaskDelay( bktSHORT_WAIT );
xRunIndicator = 0;
/*********************************************************************
Test 4
As per test 3 - but with the send and receive the other way around.
The other task blocks attempting to read from the queue.
Empty the queue. We should find that it is full. */
for( xItem = 0; xItem < bktQUEUE_LENGTH; xItem++ )
{
if( xQueueReceive( xTestQueue, &xData, bktDONT_BLOCK ) != pdPASS )
{
xErrorOccurred = pdTRUE;
}
}
/* Wake the other task so it blocks attempting to read from the
already empty queue. */
vTaskResume( xSecondary );
/* We need to wait a little to ensure the other task executes. */
while( xRunIndicator != bktRUN_INDICATOR )
{
vTaskDelay( bktSHORT_WAIT );
}
vTaskDelay( bktSHORT_WAIT );
xRunIndicator = 0;
for( xItem = 0; xItem < bktQUEUE_LENGTH; xItem++ )
{
/* Now when we place an item on the queue the other task should
wake but not execute as this task has higher priority. */
if( xQueueSend( xTestQueue, &xItem, bktDONT_BLOCK ) != pdPASS )
{
xErrorOccurred = pdTRUE;
}
/* Now empty the queue again before the other task gets a chance to
execute. If the other task had executed we would find the queue
empty ourselves, and the other task would be suspended. */
if( xQueueReceive( xTestQueue, &xData, bktDONT_BLOCK ) != pdPASS )
{
xErrorOccurred = pdTRUE;
}
if( xRunIndicator == bktRUN_INDICATOR )
{
/* The other task should not have executed. */
xErrorOccurred = pdTRUE;
}
/* Raise the priority of the other task so it executes and blocks
on the queue again. */
vTaskPrioritySet( xSecondary, bktPRIMARY_PRIORITY + 2 );
/* The other task should now have re-blocked without exiting the
queue function. */
if( xRunIndicator == bktRUN_INDICATOR )
{
/* The other task should not have executed outside of the
queue function. */
xErrorOccurred = pdTRUE;
}
vTaskPrioritySet( xSecondary, bktSECONDARY_PRIORITY );
}
/* Let the other task timeout. When it unblockes it will check that it
unblocked at the correct time, then suspend itself. */
while( xRunIndicator != bktRUN_INDICATOR )
{
vTaskDelay( bktSHORT_WAIT );
}
vTaskDelay( bktSHORT_WAIT );
xPrimaryCycles++;
}
}
/*-----------------------------------------------------------*/
static void vSecondaryBlockTimeTestTask( void *pvParameters )
{
portTickType xTimeWhenBlocking, xBlockedTime;
portBASE_TYPE xData;
( void ) pvParameters;
for( ;; )
{
/*********************************************************************
Test 1 and 2
This task does does not participate in these tests. */
vTaskSuspend( NULL );
/*********************************************************************
Test 3
The first thing we do is attempt to read from the queue. It should be
full so we block. Note the time before we block so we can check the
wake time is as per that expected. */
xTimeWhenBlocking = xTaskGetTickCount();
/* We should unblock after bktTIME_TO_BLOCK having not sent
anything to the queue. */
xData = 0;
xRunIndicator = bktRUN_INDICATOR;
if( xQueueSend( xTestQueue, &xData, bktTIME_TO_BLOCK ) != errQUEUE_FULL )
{
xErrorOccurred = pdTRUE;
}
/* How long were we inside the send function? */
xBlockedTime = xTaskGetTickCount() - xTimeWhenBlocking;
/* We should not have blocked for less time than bktTIME_TO_BLOCK. */
if( xBlockedTime < bktTIME_TO_BLOCK )
{
xErrorOccurred = pdTRUE;
}
/* We should of not blocked for much longer than bktALLOWABLE_MARGIN
either. A margin is permitted as we would not necessarily run as
soon as we unblocked. */
if( xBlockedTime > ( bktTIME_TO_BLOCK + bktALLOWABLE_MARGIN ) )
{
xErrorOccurred = pdTRUE;
}
/* Suspend ready for test 3. */
xRunIndicator = bktRUN_INDICATOR;
vTaskSuspend( NULL );
/*********************************************************************
Test 4
As per test three, but with the send and receive reversed. */
xTimeWhenBlocking = xTaskGetTickCount();
/* We should unblock after bktTIME_TO_BLOCK having not received
anything on the queue. */
xRunIndicator = bktRUN_INDICATOR;
if( xQueueReceive( xTestQueue, &xData, bktTIME_TO_BLOCK ) != errQUEUE_EMPTY )
{
xErrorOccurred = pdTRUE;
}
xBlockedTime = xTaskGetTickCount() - xTimeWhenBlocking;
/* We should not have blocked for less time than bktTIME_TO_BLOCK. */
if( xBlockedTime < bktTIME_TO_BLOCK )
{
xErrorOccurred = pdTRUE;
}
/* We should of not blocked for much longer than bktALLOWABLE_MARGIN
either. A margin is permitted as we would not necessarily run as soon
as we unblocked. */
if( xBlockedTime > ( bktTIME_TO_BLOCK + bktALLOWABLE_MARGIN ) )
{
xErrorOccurred = pdTRUE;
}
xRunIndicator = bktRUN_INDICATOR;
xSecondaryCycles++;
}
}
/*-----------------------------------------------------------*/
portBASE_TYPE xAreBlockTimeTestTasksStillRunning( void )
{
static portBASE_TYPE xLastPrimaryCycleCount = 0, xLastSecondaryCycleCount = 0;
portBASE_TYPE xReturn = pdPASS;
/* Have both tasks performed at least one cycle since this function was
last called? */
if( xPrimaryCycles == xLastPrimaryCycleCount )
{
xReturn = pdFAIL;
}
if( xSecondaryCycles == xLastSecondaryCycleCount )
{
xReturn = pdFAIL;
}
if( xErrorOccurred == pdTRUE )
{
xReturn = pdFAIL;
}
xLastSecondaryCycleCount = xSecondaryCycles;
xLastPrimaryCycleCount = xPrimaryCycles;
return xReturn;
}

304
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@ -1,304 +0,0 @@
/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
/*
* This version of comtest. c is for use on systems that have limited stack
* space and no display facilities. The complete version can be found in
* the Demo/Common/Full directory.
*
* Creates two tasks that operate on an interrupt driven serial port. A
* loopback connector should be used so that everything that is transmitted is
* also received. The serial port does not use any flow control. On a
* standard 9way 'D' connector pins two and three should be connected together.
*
* The first task posts a sequence of characters to the Tx queue, toggling an
* LED on each successful post. At the end of the sequence it sleeps for a
* pseudo-random period before resending the same sequence.
*
* The UART Tx end interrupt is enabled whenever data is available in the Tx
* queue. The Tx end ISR removes a single character from the Tx queue and
* passes it to the UART for transmission.
*
* The second task blocks on the Rx queue waiting for a character to become
* available. When the UART Rx end interrupt receives a character it places
* it in the Rx queue, waking the second task. The second task checks that the
* characters removed from the Rx queue form the same sequence as those posted
* to the Tx queue, and toggles an LED for each correct character.
*
* The receiving task is spawned with a higher priority than the transmitting
* task. The receiver will therefore wake every time a character is
* transmitted so neither the Tx or Rx queue should ever hold more than a few
* characters.
*
*/
/* Scheduler include files. */
#include <stdlib.h>
#include "FreeRTOS.h"
#include "task.h"
/* Demo program include files. */
#include "demo_serial.h"
#include "comtest2.h"
#include "partest.h"
#define comSTACK_SIZE configMINIMAL_STACK_SIZE
#define comTX_LED_OFFSET ( 0 )
#define comRX_LED_OFFSET ( 1 )
#define comTOTAL_PERMISSIBLE_ERRORS ( 2 )
/* The Tx task will transmit the sequence of characters at a pseudo random
interval. This is the maximum and minimum block time between sends. */
#define comTX_MAX_BLOCK_TIME ( ( portTickType ) 0x96 )
#define comTX_MIN_BLOCK_TIME ( ( portTickType ) 0x32 )
#define comOFFSET_TIME ( ( portTickType ) 3 )
/* We should find that each character can be queued for Tx immediately and we
don't have to block to send. */
#define comNO_BLOCK ( ( portTickType ) 0 )
/* The Rx task will block on the Rx queue for a long period. */
#define comRX_BLOCK_TIME ( ( portTickType ) 0xffff )
/* The sequence transmitted is from comFIRST_BYTE to and including comLAST_BYTE. */
#define comFIRST_BYTE ( 'A' )
#define comLAST_BYTE ( 'X' )
#define comBUFFER_LEN ( ( unsigned portBASE_TYPE ) ( comLAST_BYTE - comFIRST_BYTE ) + ( unsigned portBASE_TYPE ) 1 )
#define comINITIAL_RX_COUNT_VALUE ( 0 )
/* Handle to the com port used by both tasks. */
static xComPortHandle xPort = NULL;
/* The transmit task as described at the top of the file. */
static portTASK_FUNCTION_PROTO( vComTxTask, pvParameters );
/* The receive task as described at the top of the file. */
static portTASK_FUNCTION_PROTO( vComRxTask, pvParameters );
/* The LED that should be toggled by the Rx and Tx tasks. The Rx task will
toggle LED ( uxBaseLED + comRX_LED_OFFSET). The Tx task will toggle LED
( uxBaseLED + comTX_LED_OFFSET ). */
static unsigned portBASE_TYPE uxBaseLED = 0;
/* Check variable used to ensure no error have occurred. The Rx task will
increment this variable after every successfully received sequence. If at any
time the sequence is incorrect the the variable will stop being incremented. */
static volatile unsigned portBASE_TYPE uxRxLoops = comINITIAL_RX_COUNT_VALUE;
/*-----------------------------------------------------------*/
void vAltStartComTestTasks( unsigned portBASE_TYPE uxPriority, unsigned long ulBaudRate, unsigned portBASE_TYPE uxLED )
{
/* Initialise the com port then spawn the Rx and Tx tasks. */
uxBaseLED = uxLED;
xSerialPortInitMinimal( ulBaudRate, comBUFFER_LEN );
/* The Tx task is spawned with a lower priority than the Rx task. */
xTaskCreate( vComTxTask, ( signed char * ) "COMTx", comSTACK_SIZE, NULL, uxPriority - 1, ( xTaskHandle * ) NULL );
xTaskCreate( vComRxTask, ( signed char * ) "COMRx", comSTACK_SIZE, NULL, uxPriority, ( xTaskHandle * ) NULL );
}
/*-----------------------------------------------------------*/
static portTASK_FUNCTION( vComTxTask, pvParameters )
{
signed char cByteToSend;
portTickType xTimeToWait;
/* Just to stop compiler warnings. */
( void ) pvParameters;
for( ;; )
{
/* Simply transmit a sequence of characters from comFIRST_BYTE to
comLAST_BYTE. */
for( cByteToSend = comFIRST_BYTE; cByteToSend <= comLAST_BYTE; cByteToSend++ )
{
if( xSerialPutChar( xPort, cByteToSend, comNO_BLOCK ) == pdPASS )
{
vParTestToggleLED( uxBaseLED + comTX_LED_OFFSET );
}
}
/* Turn the LED off while we are not doing anything. */
vParTestSetLED( uxBaseLED + comTX_LED_OFFSET, pdFALSE );
/* We have posted all the characters in the string - wait before
re-sending. Wait a pseudo-random time as this will provide a better
test. */
xTimeToWait = xTaskGetTickCount() + comOFFSET_TIME;
/* Make sure we don't wait too long... */
xTimeToWait %= comTX_MAX_BLOCK_TIME;
/* ...but we do want to wait. */
if( xTimeToWait < comTX_MIN_BLOCK_TIME )
{
xTimeToWait = comTX_MIN_BLOCK_TIME;
}
vTaskDelay( xTimeToWait );
}
} /*lint !e715 !e818 pvParameters is required for a task function even if it is not referenced. */
/*-----------------------------------------------------------*/
static portTASK_FUNCTION( vComRxTask, pvParameters )
{
signed char cExpectedByte, cByteRxed;
portBASE_TYPE xResyncRequired = pdFALSE, xErrorOccurred = pdFALSE;
/* Just to stop compiler warnings. */
( void ) pvParameters;
for( ;; )
{
/* We expect to receive the characters from comFIRST_BYTE to
comLAST_BYTE in an incrementing order. Loop to receive each byte. */
for( cExpectedByte = comFIRST_BYTE; cExpectedByte <= comLAST_BYTE; cExpectedByte++ )
{
/* Block on the queue that contains received bytes until a byte is
available. */
if( xSerialGetChar( xPort, &cByteRxed, comRX_BLOCK_TIME ) )
{
/* Was this the byte we were expecting? If so, toggle the LED,
otherwise we are out on sync and should break out of the loop
until the expected character sequence is about to restart. */
if( cByteRxed == cExpectedByte )
{
vParTestToggleLED( uxBaseLED + comRX_LED_OFFSET );
}
else
{
xResyncRequired = pdTRUE;
break; /*lint !e960 Non-switch break allowed. */
}
}
}
/* Turn the LED off while we are not doing anything. */
vParTestSetLED( uxBaseLED + comRX_LED_OFFSET, pdFALSE );
/* Did we break out of the loop because the characters were received in
an unexpected order? If so wait here until the character sequence is
about to restart. */
if( xResyncRequired == pdTRUE )
{
while( cByteRxed != comLAST_BYTE )
{
/* Block until the next char is available. */
xSerialGetChar( xPort, &cByteRxed, comRX_BLOCK_TIME );
}
/* Note that an error occurred which caused us to have to resync.
We use this to stop incrementing the loop counter so
sAreComTestTasksStillRunning() will return false - indicating an
error. */
xErrorOccurred++;
/* We have now resynced with the Tx task and can continue. */
xResyncRequired = pdFALSE;
}
else
{
if( xErrorOccurred < comTOTAL_PERMISSIBLE_ERRORS )
{
/* Increment the count of successful loops. As error
occurring (i.e. an unexpected character being received) will
prevent this counter being incremented for the rest of the
execution. Don't worry about mutual exclusion on this
variable - it doesn't really matter as we just want it
to change. */
uxRxLoops++;
}
}
}
} /*lint !e715 !e818 pvParameters is required for a task function even if it is not referenced. */
/*-----------------------------------------------------------*/
portBASE_TYPE xAreComTestTasksStillRunning( void )
{
portBASE_TYPE xReturn;
/* If the count of successful reception loops has not changed than at
some time an error occurred (i.e. a character was received out of sequence)
and we will return false. */
if( uxRxLoops == comINITIAL_RX_COUNT_VALUE )
{
xReturn = pdFALSE;
}
else
{
xReturn = pdTRUE;
}
/* Reset the count of successful Rx loops. When this function is called
again we expect this to have been incremented. */
uxRxLoops = comINITIAL_RX_COUNT_VALUE;
return xReturn;
}

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FreeRTOS/Demo/CORTEX_M4_ATSAM4S_Atmel_Studio/src/Common-Demo-Source/countsem.c
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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
/*
* Simple demonstration of the usage of counting semaphore.
*/
/* Scheduler include files. */
#include "FreeRTOS.h"
#include "task.h"
#include "semphr.h"
/* Demo program include files. */
#include "countsem.h"
/* The maximum count value that the semaphore used for the demo can hold. */
#define countMAX_COUNT_VALUE ( 200 )
/* Constants used to indicate whether or not the semaphore should have been
created with its maximum count value, or its minimum count value. These
numbers are used to ensure that the pointers passed in as the task parameters
are valid. */
#define countSTART_AT_MAX_COUNT ( 0xaa )
#define countSTART_AT_ZERO ( 0x55 )
/* Two tasks are created for the test. One uses a semaphore created with its
count value set to the maximum, and one with the count value set to zero. */
#define countNUM_TEST_TASKS ( 2 )
#define countDONT_BLOCK ( 0 )
/*-----------------------------------------------------------*/
/* Flag that will be latched to pdTRUE should any unexpected behaviour be
detected in any of the tasks. */
static volatile portBASE_TYPE xErrorDetected = pdFALSE;
/*-----------------------------------------------------------*/
/*
* The demo task. This simply counts the semaphore up to its maximum value,
* the counts it back down again. The result of each semaphore 'give' and
* 'take' is inspected, with an error being flagged if it is found not to be
* the expected result.
*/
static void prvCountingSemaphoreTask( void *pvParameters );
/*
* Utility function to increment the semaphore count value up from zero to
* countMAX_COUNT_VALUE.
*/
static void prvIncrementSemaphoreCount( xSemaphoreHandle xSemaphore, unsigned portBASE_TYPE *puxLoopCounter );
/*
* Utility function to decrement the semaphore count value up from
* countMAX_COUNT_VALUE to zero.
*/
static void prvDecrementSemaphoreCount( xSemaphoreHandle xSemaphore, unsigned portBASE_TYPE *puxLoopCounter );
/*-----------------------------------------------------------*/
/* The structure that is passed into the task as the task parameter. */
typedef struct COUNT_SEM_STRUCT
{
/* The semaphore to be used for the demo. */
xSemaphoreHandle xSemaphore;
/* Set to countSTART_AT_MAX_COUNT if the semaphore should be created with
its count value set to its max count value, or countSTART_AT_ZERO if it
should have been created with its count value set to 0. */
unsigned portBASE_TYPE uxExpectedStartCount;
/* Incremented on each cycle of the demo task. Used to detect a stalled
task. */
unsigned portBASE_TYPE uxLoopCounter;
} xCountSemStruct;
/* Two structures are defined, one is passed to each test task. */
static volatile xCountSemStruct xParameters[ countNUM_TEST_TASKS ];
/*-----------------------------------------------------------*/
void vStartCountingSemaphoreTasks( void )
{
/* Create the semaphores that we are going to use for the test/demo. The
first should be created such that it starts at its maximum count value,
the second should be created such that it starts with a count value of zero. */
xParameters[ 0 ].xSemaphore = xSemaphoreCreateCounting( countMAX_COUNT_VALUE, countMAX_COUNT_VALUE );
xParameters[ 0 ].uxExpectedStartCount = countSTART_AT_MAX_COUNT;
xParameters[ 0 ].uxLoopCounter = 0;
xParameters[ 1 ].xSemaphore = xSemaphoreCreateCounting( countMAX_COUNT_VALUE, 0 );
xParameters[ 1 ].uxExpectedStartCount = 0;
xParameters[ 1 ].uxLoopCounter = 0;
/* vQueueAddToRegistry() adds the semaphore to the registry, if one is
in use. The registry is provided as a means for kernel aware
debuggers to locate semaphores and has no purpose if a kernel aware debugger
is not being used. The call to vQueueAddToRegistry() will be removed
by the pre-processor if configQUEUE_REGISTRY_SIZE is not defined or is
defined to be less than 1. */
vQueueAddToRegistry( ( xQueueHandle ) xParameters[ 0 ].xSemaphore, ( signed portCHAR * ) "Counting_Sem_1" );
vQueueAddToRegistry( ( xQueueHandle ) xParameters[ 1 ].xSemaphore, ( signed portCHAR * ) "Counting_Sem_2" );
/* Were the semaphores created? */
if( ( xParameters[ 0 ].xSemaphore != NULL ) || ( xParameters[ 1 ].xSemaphore != NULL ) )
{
/* Create the demo tasks, passing in the semaphore to use as the parameter. */
xTaskCreate( prvCountingSemaphoreTask, ( signed portCHAR * ) "CNT1", configMINIMAL_STACK_SIZE, ( void * ) &( xParameters[ 0 ] ), tskIDLE_PRIORITY, NULL );
xTaskCreate( prvCountingSemaphoreTask, ( signed portCHAR * ) "CNT2", configMINIMAL_STACK_SIZE, ( void * ) &( xParameters[ 1 ] ), tskIDLE_PRIORITY, NULL );
}
}
/*-----------------------------------------------------------*/
static void prvDecrementSemaphoreCount( xSemaphoreHandle xSemaphore, unsigned portBASE_TYPE *puxLoopCounter )
{
unsigned portBASE_TYPE ux;
/* If the semaphore count is at its maximum then we should not be able to
'give' the semaphore. */
if( xSemaphoreGive( xSemaphore ) == pdPASS )
{
xErrorDetected = pdTRUE;
}
/* We should be able to 'take' the semaphore countMAX_COUNT_VALUE times. */
for( ux = 0; ux < countMAX_COUNT_VALUE; ux++ )
{
if( xSemaphoreTake( xSemaphore, countDONT_BLOCK ) != pdPASS )
{
/* We expected to be able to take the semaphore. */
xErrorDetected = pdTRUE;
}
( *puxLoopCounter )++;
}
#if configUSE_PREEMPTION == 0
taskYIELD();
#endif
/* If the semaphore count is zero then we should not be able to 'take'
the semaphore. */
if( xSemaphoreTake( xSemaphore, countDONT_BLOCK ) == pdPASS )
{
xErrorDetected = pdTRUE;
}
}
/*-----------------------------------------------------------*/
static void prvIncrementSemaphoreCount( xSemaphoreHandle xSemaphore, unsigned portBASE_TYPE *puxLoopCounter )
{
unsigned portBASE_TYPE ux;
/* If the semaphore count is zero then we should not be able to 'take'
the semaphore. */
if( xSemaphoreTake( xSemaphore, countDONT_BLOCK ) == pdPASS )
{
xErrorDetected = pdTRUE;
}
/* We should be able to 'give' the semaphore countMAX_COUNT_VALUE times. */
for( ux = 0; ux < countMAX_COUNT_VALUE; ux++ )
{
if( xSemaphoreGive( xSemaphore ) != pdPASS )
{
/* We expected to be able to take the semaphore. */
xErrorDetected = pdTRUE;
}
( *puxLoopCounter )++;
}
#if configUSE_PREEMPTION == 0
taskYIELD();
#endif
/* If the semaphore count is at its maximum then we should not be able to
'give' the semaphore. */
if( xSemaphoreGive( xSemaphore ) == pdPASS )
{
xErrorDetected = pdTRUE;
}
}
/*-----------------------------------------------------------*/
static void prvCountingSemaphoreTask( void *pvParameters )
{
xCountSemStruct *pxParameter;
#ifdef USE_STDIO
void vPrintDisplayMessage( const portCHAR * const * ppcMessageToSend );
const portCHAR * const pcTaskStartMsg = "Counting semaphore demo started.\r\n";
/* Queue a message for printing to say the task has started. */
vPrintDisplayMessage( &pcTaskStartMsg );
#endif
/* The semaphore to be used was passed as the parameter. */
pxParameter = ( xCountSemStruct * ) pvParameters;
/* Did we expect to find the semaphore already at its max count value, or
at zero? */
if( pxParameter->uxExpectedStartCount == countSTART_AT_MAX_COUNT )
{
prvDecrementSemaphoreCount( pxParameter->xSemaphore, &( pxParameter->uxLoopCounter ) );
}
/* Now we expect the semaphore count to be 0, so this time there is an
error if we can take the semaphore. */
if( xSemaphoreTake( pxParameter->xSemaphore, 0 ) == pdPASS )
{
xErrorDetected = pdTRUE;
}
for( ;; )
{
prvIncrementSemaphoreCount( pxParameter->xSemaphore, &( pxParameter->uxLoopCounter ) );
prvDecrementSemaphoreCount( pxParameter->xSemaphore, &( pxParameter->uxLoopCounter ) );
}
}
/*-----------------------------------------------------------*/
portBASE_TYPE xAreCountingSemaphoreTasksStillRunning( void )
{
static unsigned portBASE_TYPE uxLastCount0 = 0, uxLastCount1 = 0;
portBASE_TYPE xReturn = pdPASS;
/* Return fail if any 'give' or 'take' did not result in the expected
behaviour. */
if( xErrorDetected != pdFALSE )
{
xReturn = pdFAIL;
}
/* Return fail if either task is not still incrementing its loop counter. */
if( uxLastCount0 == xParameters[ 0 ].uxLoopCounter )
{
xReturn = pdFAIL;
}
else
{
uxLastCount0 = xParameters[ 0 ].uxLoopCounter;
}
if( uxLastCount1 == xParameters[ 1 ].uxLoopCounter )
{
xReturn = pdFAIL;
}
else
{
uxLastCount1 = xParameters[ 1 ].uxLoopCounter;
}
return xReturn;
}

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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
/**
* Create a single persistent task which periodically dynamically creates another
* two tasks. The original task is called the creator task, the two tasks it
* creates are called suicidal tasks.
*
* One of the created suicidal tasks kill one other suicidal task before killing
* itself - leaving just the original task remaining.
*
* The creator task must be spawned after all of the other demo application tasks
* as it keeps a check on the number of tasks under the scheduler control. The
* number of tasks it expects to see running should never be greater than the
* number of tasks that were in existence when the creator task was spawned, plus
* one set of four suicidal tasks. If this number is exceeded an error is flagged.
*
* \page DeathC death.c
* \ingroup DemoFiles
* <HR>
*/
/*
Changes from V3.0.0
+ CreationCount sizes changed from unsigned portBASE_TYPE to
unsigned short to minimize the risk of overflowing.
+ Reset of usLastCreationCount added
Changes from V3.1.0
+ Changed the dummy calculation to use variables of type long, rather than
float. This allows the file to be used with ports that do not support
floating point.
*/
#include <stdlib.h>
/* Scheduler include files. */
#include "FreeRTOS.h"
#include "task.h"
/* Demo program include files. */
#include "death.h"
#define deathSTACK_SIZE ( configMINIMAL_STACK_SIZE + 60 )
/* The task originally created which is responsible for periodically dynamically
creating another four tasks. */
static portTASK_FUNCTION_PROTO( vCreateTasks, pvParameters );
/* The task function of the dynamically created tasks. */
static portTASK_FUNCTION_PROTO( vSuicidalTask, pvParameters );
/* A variable which is incremented every time the dynamic tasks are created. This
is used to check that the task is still running. */
static volatile unsigned short usCreationCount = 0;
/* Used to store the number of tasks that were originally running so the creator
task can tell if any of the suicidal tasks have failed to die.
*/
static volatile unsigned portBASE_TYPE uxTasksRunningAtStart = 0;
/* Tasks are deleted by the idle task. Under heavy load the idle task might
not get much processing time, so it would be legitimate for several tasks to
remain undeleted for a short period. */
static const unsigned portBASE_TYPE uxMaxNumberOfExtraTasksRunning = 2;
/* Used to store a handle to the task that should be killed by a suicidal task,
before it kills itself. */
xTaskHandle xCreatedTask;
/*-----------------------------------------------------------*/
void vCreateSuicidalTasks( unsigned portBASE_TYPE uxPriority )
{
unsigned portBASE_TYPE *puxPriority;
/* Create the Creator tasks - passing in as a parameter the priority at which
the suicidal tasks should be created. */
puxPriority = ( unsigned portBASE_TYPE * ) pvPortMalloc( sizeof( unsigned portBASE_TYPE ) );
*puxPriority = uxPriority;
xTaskCreate( vCreateTasks, ( signed char * ) "CREATOR", deathSTACK_SIZE, ( void * ) puxPriority, uxPriority, NULL );
/* Record the number of tasks that are running now so we know if any of the
suicidal tasks have failed to be killed. */
uxTasksRunningAtStart = ( unsigned portBASE_TYPE ) uxTaskGetNumberOfTasks();
/* FreeRTOS.org versions before V3.0 started the idle-task as the very
first task. The idle task was then already included in uxTasksRunningAtStart.
From FreeRTOS V3.0 on, the idle task is started when the scheduler is
started. Therefore the idle task is not yet accounted for. We correct
this by increasing uxTasksRunningAtStart by 1. */
uxTasksRunningAtStart++;
/* From FreeRTOS version 7.0.0 can optionally create a timer service task.
If this is done, then uxTasksRunningAtStart needs incrementing again as that
too is created when the scheduler is started. */
#if configUSE_TIMERS == 1
uxTasksRunningAtStart++;
#endif
}
/*-----------------------------------------------------------*/
static portTASK_FUNCTION( vSuicidalTask, pvParameters )
{
volatile long l1, l2;
xTaskHandle xTaskToKill;
const portTickType xDelay = ( portTickType ) 200 / portTICK_RATE_MS;
if( pvParameters != NULL )
{
/* This task is periodically created four times. Two created tasks are
passed a handle to the other task so it can kill it before killing itself.
The other task is passed in null. */
xTaskToKill = *( xTaskHandle* )pvParameters;
}
else
{
xTaskToKill = NULL;
}
for( ;; )
{
/* Do something random just to use some stack and registers. */
l1 = 2;
l2 = 89;
l2 *= l1;
vTaskDelay( xDelay );
if( xTaskToKill != NULL )
{
/* Make sure the other task has a go before we delete it. */
vTaskDelay( ( portTickType ) 0 );
/* Kill the other task that was created by vCreateTasks(). */
vTaskDelete( xTaskToKill );
/* Kill ourselves. */
vTaskDelete( NULL );
}
}
}/*lint !e818 !e550 Function prototype must be as per standard for task functions. */
/*-----------------------------------------------------------*/
static portTASK_FUNCTION( vCreateTasks, pvParameters )
{
const portTickType xDelay = ( portTickType ) 1000 / portTICK_RATE_MS;
unsigned portBASE_TYPE uxPriority;
uxPriority = *( unsigned portBASE_TYPE * ) pvParameters;
vPortFree( pvParameters );
for( ;; )
{
/* Just loop round, delaying then creating the four suicidal tasks. */
vTaskDelay( xDelay );
xCreatedTask = NULL;
xTaskCreate( vSuicidalTask, ( signed char * ) "SUICID1", configMINIMAL_STACK_SIZE, NULL, uxPriority, &xCreatedTask );
xTaskCreate( vSuicidalTask, ( signed char * ) "SUICID2", configMINIMAL_STACK_SIZE, &xCreatedTask, uxPriority, NULL );
++usCreationCount;
}
}
/*-----------------------------------------------------------*/
/* This is called to check that the creator task is still running and that there
are not any more than four extra tasks. */
portBASE_TYPE xIsCreateTaskStillRunning( void )
{
static unsigned short usLastCreationCount = 0xfff;
portBASE_TYPE xReturn = pdTRUE;
static unsigned portBASE_TYPE uxTasksRunningNow;
if( usLastCreationCount == usCreationCount )
{
xReturn = pdFALSE;
}
else
{
usLastCreationCount = usCreationCount;
}
uxTasksRunningNow = ( unsigned portBASE_TYPE ) uxTaskGetNumberOfTasks();
if( uxTasksRunningNow < uxTasksRunningAtStart )
{
xReturn = pdFALSE;
}
else if( ( uxTasksRunningNow - uxTasksRunningAtStart ) > uxMaxNumberOfExtraTasksRunning )
{
xReturn = pdFALSE;
}
else
{
/* Everything is okay. */
}
return xReturn;
}

440
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@ -1,440 +0,0 @@
/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
/*
* The first test creates three tasks - two counter tasks (one continuous count
* and one limited count) and one controller. A "count" variable is shared
* between all three tasks. The two counter tasks should never be in a "ready"
* state at the same time. The controller task runs at the same priority as
* the continuous count task, and at a lower priority than the limited count
* task.
*
* One counter task loops indefinitely, incrementing the shared count variable
* on each iteration. To ensure it has exclusive access to the variable it
* raises it's priority above that of the controller task before each
* increment, lowering it again to it's original priority before starting the
* next iteration.
*
* The other counter task increments the shared count variable on each
* iteration of it's loop until the count has reached a limit of 0xff - at
* which point it suspends itself. It will not start a new loop until the
* controller task has made it "ready" again by calling vTaskResume ().
* This second counter task operates at a higher priority than controller
* task so does not need to worry about mutual exclusion of the counter
* variable.
*
* The controller task is in two sections. The first section controls and
* monitors the continuous count task. When this section is operational the
* limited count task is suspended. Likewise, the second section controls
* and monitors the limited count task. When this section is operational the
* continuous count task is suspended.
*
* In the first section the controller task first takes a copy of the shared
* count variable. To ensure mutual exclusion on the count variable it
* suspends the continuous count task, resuming it again when the copy has been
* taken. The controller task then sleeps for a fixed period - during which
* the continuous count task will execute and increment the shared variable.
* When the controller task wakes it checks that the continuous count task
* has executed by comparing the copy of the shared variable with its current
* value. This time, to ensure mutual exclusion, the scheduler itself is
* suspended with a call to vTaskSuspendAll (). This is for demonstration
* purposes only and is not a recommended technique due to its inefficiency.
*
* After a fixed number of iterations the controller task suspends the
* continuous count task, and moves on to its second section.
*
* At the start of the second section the shared variable is cleared to zero.
* The limited count task is then woken from it's suspension by a call to
* vTaskResume (). As this counter task operates at a higher priority than
* the controller task the controller task should not run again until the
* shared variable has been counted up to the limited value causing the counter
* task to suspend itself. The next line after vTaskResume () is therefore
* a check on the shared variable to ensure everything is as expected.
*
*
* The second test consists of a couple of very simple tasks that post onto a
* queue while the scheduler is suspended. This test was added to test parts
* of the scheduler not exercised by the first test.
*
*/
#include <stdlib.h>
/* Scheduler include files. */
#include "FreeRTOS.h"
#include "task.h"
#include "semphr.h"
/* Demo app include files. */
#include "dynamic.h"
/* Function that implements the "limited count" task as described above. */
static portTASK_FUNCTION_PROTO( vLimitedIncrementTask, pvParameters );
/* Function that implements the "continuous count" task as described above. */
static portTASK_FUNCTION_PROTO( vContinuousIncrementTask, pvParameters );
/* Function that implements the controller task as described above. */
static portTASK_FUNCTION_PROTO( vCounterControlTask, pvParameters );
static portTASK_FUNCTION_PROTO( vQueueReceiveWhenSuspendedTask, pvParameters );
static portTASK_FUNCTION_PROTO( vQueueSendWhenSuspendedTask, pvParameters );
/* Demo task specific constants. */
#define priSTACK_SIZE ( configMINIMAL_STACK_SIZE )
#define priSLEEP_TIME ( ( portTickType ) 128 / portTICK_RATE_MS )
#define priLOOPS ( 5 )
#define priMAX_COUNT ( ( unsigned long ) 0xff )
#define priNO_BLOCK ( ( portTickType ) 0 )
#define priSUSPENDED_QUEUE_LENGTH ( 1 )
/*-----------------------------------------------------------*/
/* Handles to the two counter tasks. These could be passed in as parameters
to the controller task to prevent them having to be file scope. */
static xTaskHandle xContinousIncrementHandle, xLimitedIncrementHandle;
/* The shared counter variable. This is passed in as a parameter to the two
counter variables for demonstration purposes. */
static unsigned long ulCounter;
/* Variables used to check that the tasks are still operating without error.
Each complete iteration of the controller task increments this variable
provided no errors have been found. The variable maintaining the same value
is therefore indication of an error. */
static volatile unsigned short usCheckVariable = ( unsigned short ) 0;
static volatile portBASE_TYPE xSuspendedQueueSendError = pdFALSE;
static volatile portBASE_TYPE xSuspendedQueueReceiveError = pdFALSE;
/* Queue used by the second test. */
xQueueHandle xSuspendedTestQueue;
/*-----------------------------------------------------------*/
/*
* Start the three tasks as described at the top of the file.
* Note that the limited count task is given a higher priority.
*/
void vStartDynamicPriorityTasks( void )
{
xSuspendedTestQueue = xQueueCreate( priSUSPENDED_QUEUE_LENGTH, sizeof( unsigned long ) );
/* vQueueAddToRegistry() adds the queue to the queue registry, if one is
in use. The queue registry is provided as a means for kernel aware
debuggers to locate queues and has no purpose if a kernel aware debugger
is not being used. The call to vQueueAddToRegistry() will be removed
by the pre-processor if configQUEUE_REGISTRY_SIZE is not defined or is
defined to be less than 1. */
vQueueAddToRegistry( xSuspendedTestQueue, ( signed char * ) "Suspended_Test_Queue" );
xTaskCreate( vContinuousIncrementTask, ( signed char * ) "CNT_INC", priSTACK_SIZE, ( void * ) &ulCounter, tskIDLE_PRIORITY, &xContinousIncrementHandle );
xTaskCreate( vLimitedIncrementTask, ( signed char * ) "LIM_INC", priSTACK_SIZE, ( void * ) &ulCounter, tskIDLE_PRIORITY + 1, &xLimitedIncrementHandle );
xTaskCreate( vCounterControlTask, ( signed char * ) "C_CTRL", priSTACK_SIZE, NULL, tskIDLE_PRIORITY, NULL );
xTaskCreate( vQueueSendWhenSuspendedTask, ( signed char * ) "SUSP_TX", priSTACK_SIZE, NULL, tskIDLE_PRIORITY, NULL );
xTaskCreate( vQueueReceiveWhenSuspendedTask, ( signed char * ) "SUSP_RX", priSTACK_SIZE, NULL, tskIDLE_PRIORITY, NULL );
}
/*-----------------------------------------------------------*/
/*
* Just loops around incrementing the shared variable until the limit has been
* reached. Once the limit has been reached it suspends itself.
*/
static portTASK_FUNCTION( vLimitedIncrementTask, pvParameters )
{
unsigned long *pulCounter;
/* Take a pointer to the shared variable from the parameters passed into
the task. */
pulCounter = ( unsigned long * ) pvParameters;
/* This will run before the control task, so the first thing it does is
suspend - the control task will resume it when ready. */
vTaskSuspend( NULL );
for( ;; )
{
/* Just count up to a value then suspend. */
( *pulCounter )++;
if( *pulCounter >= priMAX_COUNT )
{
vTaskSuspend( NULL );
}
}
}
/*-----------------------------------------------------------*/
/*
* Just keep counting the shared variable up. The control task will suspend
* this task when it wants.
*/
static portTASK_FUNCTION( vContinuousIncrementTask, pvParameters )
{
unsigned long *pulCounter;
unsigned portBASE_TYPE uxOurPriority;
/* Take a pointer to the shared variable from the parameters passed into
the task. */
pulCounter = ( unsigned long * ) pvParameters;
/* Query our priority so we can raise it when exclusive access to the
shared variable is required. */
uxOurPriority = uxTaskPriorityGet( NULL );
for( ;; )
{
/* Raise our priority above the controller task to ensure a context
switch does not occur while we are accessing this variable. */
vTaskPrioritySet( NULL, uxOurPriority + 1 );
( *pulCounter )++;
vTaskPrioritySet( NULL, uxOurPriority );
}
}
/*-----------------------------------------------------------*/
/*
* Controller task as described above.
*/
static portTASK_FUNCTION( vCounterControlTask, pvParameters )
{
unsigned long ulLastCounter;
short sLoops;
short sError = pdFALSE;
/* Just to stop warning messages. */
( void ) pvParameters;
for( ;; )
{
/* Start with the counter at zero. */
ulCounter = ( unsigned long ) 0;
/* First section : */
/* Check the continuous count task is running. */
for( sLoops = 0; sLoops < priLOOPS; sLoops++ )
{
/* Suspend the continuous count task so we can take a mirror of the
shared variable without risk of corruption. */
vTaskSuspend( xContinousIncrementHandle );
ulLastCounter = ulCounter;
vTaskResume( xContinousIncrementHandle );
/* Now delay to ensure the other task has processor time. */
vTaskDelay( priSLEEP_TIME );
/* Check the shared variable again. This time to ensure mutual
exclusion the whole scheduler will be locked. This is just for
demo purposes! */
vTaskSuspendAll();
{
if( ulLastCounter == ulCounter )
{
/* The shared variable has not changed. There is a problem
with the continuous count task so flag an error. */
sError = pdTRUE;
}
}
xTaskResumeAll();
}
/* Second section: */
/* Suspend the continuous counter task so it stops accessing the shared variable. */
vTaskSuspend( xContinousIncrementHandle );
/* Reset the variable. */
ulCounter = ( unsigned long ) 0;
/* Resume the limited count task which has a higher priority than us.
We should therefore not return from this call until the limited count
task has suspended itself with a known value in the counter variable. */
vTaskResume( xLimitedIncrementHandle );
/* Does the counter variable have the expected value? */
if( ulCounter != priMAX_COUNT )
{
sError = pdTRUE;
}
if( sError == pdFALSE )
{
/* If no errors have occurred then increment the check variable. */
portENTER_CRITICAL();
usCheckVariable++;
portEXIT_CRITICAL();
}
/* Resume the continuous count task and do it all again. */
vTaskResume( xContinousIncrementHandle );
}
}
/*-----------------------------------------------------------*/
static portTASK_FUNCTION( vQueueSendWhenSuspendedTask, pvParameters )
{
static unsigned long ulValueToSend = ( unsigned long ) 0;
/* Just to stop warning messages. */
( void ) pvParameters;
for( ;; )
{
vTaskSuspendAll();
{
/* We must not block while the scheduler is suspended! */
if( xQueueSend( xSuspendedTestQueue, ( void * ) &ulValueToSend, priNO_BLOCK ) != pdTRUE )
{
xSuspendedQueueSendError = pdTRUE;
}
}
xTaskResumeAll();
vTaskDelay( priSLEEP_TIME );
++ulValueToSend;
}
}
/*-----------------------------------------------------------*/
static portTASK_FUNCTION( vQueueReceiveWhenSuspendedTask, pvParameters )
{
static unsigned long ulExpectedValue = ( unsigned long ) 0, ulReceivedValue;
portBASE_TYPE xGotValue;
/* Just to stop warning messages. */
( void ) pvParameters;
for( ;; )
{
do
{
/* Suspending the scheduler here is fairly pointless and
undesirable for a normal application. It is done here purely
to test the scheduler. The inner xTaskResumeAll() should
never return pdTRUE as the scheduler is still locked by the
outer call. */
vTaskSuspendAll();
{
vTaskSuspendAll();
{
xGotValue = xQueueReceive( xSuspendedTestQueue, ( void * ) &ulReceivedValue, priNO_BLOCK );
}
if( xTaskResumeAll() )
{
xSuspendedQueueReceiveError = pdTRUE;
}
}
xTaskResumeAll();
#if configUSE_PREEMPTION == 0
{
taskYIELD();
}
#endif
} while( xGotValue == pdFALSE );
if( ulReceivedValue != ulExpectedValue )
{
xSuspendedQueueReceiveError = pdTRUE;
}
++ulExpectedValue;
}
}
/*-----------------------------------------------------------*/
/* Called to check that all the created tasks are still running without error. */
portBASE_TYPE xAreDynamicPriorityTasksStillRunning( void )
{
/* Keep a history of the check variables so we know if it has been incremented
since the last call. */
static unsigned short usLastTaskCheck = ( unsigned short ) 0;
portBASE_TYPE xReturn = pdTRUE;
/* Check the tasks are still running by ensuring the check variable
is still incrementing. */
if( usCheckVariable == usLastTaskCheck )
{
/* The check has not incremented so an error exists. */
xReturn = pdFALSE;
}
if( xSuspendedQueueSendError == pdTRUE )
{
xReturn = pdFALSE;
}
if( xSuspendedQueueReceiveError == pdTRUE )
{
xReturn = pdFALSE;
}
usLastTaskCheck = usCheckVariable;
return xReturn;
}

137
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@ -1,137 +0,0 @@
/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
/**
* Repeatedly toggles one or more LEDs using software timers - one timer per
* LED.
*/
/* Scheduler include files. */
#include "FreeRTOS.h"
#include "timers.h"
/* Demo program include files. */
#include "partest.h"
#include "flash_timer.h"
/* The toggle rates are all a multple of ledFLASH_RATE_BASE. */
#define ledFLASH_RATE_BASE ( ( ( portTickType ) 333 ) / portTICK_RATE_MS )
/* A block time of zero simple means "don't block". */
#define ledDONT_BLOCK ( ( portTickType ) 0 )
/*-----------------------------------------------------------*/
/*
* The callback function used by each LED flashing timer. All the timers use
* this function, and the timer ID is used within the function to determine
* which timer has actually expired.
*/
static void prvLEDTimerCallback( xTimerHandle xTimer );
/*-----------------------------------------------------------*/
void vStartLEDFlashTimers( unsigned portBASE_TYPE uxNumberOfLEDs )
{
unsigned portBASE_TYPE uxLEDTimer;
xTimerHandle xTimer;
/* Create and start the requested number of timers. */
for( uxLEDTimer = 0; uxLEDTimer < uxNumberOfLEDs; ++uxLEDTimer )
{
/* Create the timer. */
xTimer = xTimerCreate( ( const signed char * const ) "Flasher",/* A text name, purely to help debugging. */
ledFLASH_RATE_BASE * ( uxLEDTimer + 1 ), /* The timer period, which is a multiple of ledFLASH_RATE_BASE. */
pdTRUE, /* This is an auto-reload timer, so xAutoReload is set to pdTRUE. */
( void * ) uxLEDTimer, /* The ID is used to identify the timer within the timer callback function, as each timer uses the same callback. */
prvLEDTimerCallback /* Each timer uses the same callback. */
);
/* If the timer was created successfully, attempt to start it. If the
scheduler has not yet been started then the timer command queue must
be long enough to hold each command sent to it until such time that the
scheduler is started. The timer command queue length is set by
configTIMER_QUEUE_LENGTH in FreeRTOSConfig.h. */
if( xTimer != NULL )
{
xTimerStart( xTimer, ledDONT_BLOCK );
}
}
}
/*-----------------------------------------------------------*/
static void prvLEDTimerCallback( xTimerHandle xTimer )
{
portBASE_TYPE xTimerID;
/* The timer ID is used to identify the timer that has actually expired as
each timer uses the same callback. The ID is then also used as the number
of the LED that is to be toggled. */
xTimerID = ( portBASE_TYPE ) pvTimerGetTimerID( xTimer );
vParTestToggleLED( xTimerID );
}

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FreeRTOS/Demo/CORTEX_M4_ATSAM4S_Atmel_Studio/src/Common-Demo-Source/include/BlockQ.h
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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
#ifndef BLOCK_Q_H
#define BLOCK_Q_H
void vStartBlockingQueueTasks( unsigned portBASE_TYPE uxPriority );
portBASE_TYPE xAreBlockingQueuesStillRunning( void );
#endif

76
FreeRTOS/Demo/CORTEX_M4_ATSAM4S_Atmel_Studio/src/Common-Demo-Source/include/GenQTest.h
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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
#ifndef GEN_Q_TEST_H
#define GEN_Q_TEST_H
void vStartGenericQueueTasks( unsigned portBASE_TYPE uxPriority );
portBASE_TYPE xAreGenericQueueTasksStillRunning( void );
#endif /* GEN_Q_TEST_H */

75
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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
#ifndef POLLED_Q_H
#define POLLED_Q_H
void vStartPolledQueueTasks( unsigned portBASE_TYPE uxPriority );
portBASE_TYPE xArePollingQueuesStillRunning( void );
#endif

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FreeRTOS/Demo/CORTEX_M4_ATSAM4S_Atmel_Studio/src/Common-Demo-Source/include/blocktim.h
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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
#ifndef BLOCK_TIME_TEST_H
#define BLOCK_TIME_TEST_H
void vCreateBlockTimeTasks( void );
portBASE_TYPE xAreBlockTimeTestTasksStillRunning( void );
#endif

74
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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
#ifndef COMTEST_H
#define COMTEST_H
void vAltStartComTestTasks( unsigned portBASE_TYPE uxPriority, unsigned long ulBaudRate, unsigned portBASE_TYPE uxLED );
portBASE_TYPE xAreComTestTasksStillRunning( void );
#endif

74
FreeRTOS/Demo/CORTEX_M4_ATSAM4S_Atmel_Studio/src/Common-Demo-Source/include/countsem.h
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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
#ifndef COUNT_SEMAPHORE_TEST_H
#define COUNT_SEMAPHORE_TEST_H
void vStartCountingSemaphoreTasks( void );
portBASE_TYPE xAreCountingSemaphoreTasksStillRunning( void );
#endif

75
FreeRTOS/Demo/CORTEX_M4_ATSAM4S_Atmel_Studio/src/Common-Demo-Source/include/death.h
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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
#ifndef SUICIDE_TASK_H
#define SUICIDE_TASK_H
void vCreateSuicidalTasks( unsigned portBASE_TYPE uxPriority );
portBASE_TYPE xIsCreateTaskStillRunning( void );
#endif

137
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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
#ifndef SERIAL_COMMS_H
#define SERIAL_COMMS_H
typedef void * xComPortHandle;
typedef enum
{
serCOM1,
serCOM2,
serCOM3,
serCOM4,
serCOM5,
serCOM6,
serCOM7,
serCOM8
} eCOMPort;
typedef enum
{
serNO_PARITY,
serODD_PARITY,
serEVEN_PARITY,
serMARK_PARITY,
serSPACE_PARITY
} eParity;
typedef enum
{
serSTOP_1,
serSTOP_2
} eStopBits;
typedef enum
{
serBITS_5,
serBITS_6,
serBITS_7,
serBITS_8
} eDataBits;
typedef enum
{
ser50,
ser75,
ser110,
ser134,
ser150,
ser200,
ser300,
ser600,
ser1200,
ser1800,
ser2400,
ser4800,
ser9600,
ser19200,
ser38400,
ser57600,
ser115200
} eBaud;
xComPortHandle xSerialPortInitMinimal( unsigned long ulWantedBaud, unsigned portBASE_TYPE uxQueueLength );
xComPortHandle xSerialPortInit( eCOMPort ePort, eBaud eWantedBaud, eParity eWantedParity, eDataBits eWantedDataBits, eStopBits eWantedStopBits, unsigned portBASE_TYPE uxBufferLength );
void vSerialPutString( xComPortHandle pxPort, const signed char * const pcString, unsigned short usStringLength );
signed portBASE_TYPE xSerialGetChar( xComPortHandle pxPort, signed char *pcRxedChar, portTickType xBlockTime );
signed portBASE_TYPE xSerialPutChar( xComPortHandle pxPort, signed char cOutChar, portTickType xBlockTime );
portBASE_TYPE xSerialWaitForSemaphore( xComPortHandle xPort );
void vSerialClose( xComPortHandle xPort );
#endif

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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
#ifndef DYNAMIC_MANIPULATION_H
#define DYNAMIC_MANIPULATION_H
void vStartDynamicPriorityTasks( void );
portBASE_TYPE xAreDynamicPriorityTasksStillRunning( void );
#endif

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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
#ifndef FLASH_TIMER_H
#define FLASH_TIMER_H
/*
* Creates the LED flashing timers. xNumberOfLEDs specifies how many timers to
* create, with each timer toggling a different LED. The first LED to be
* toggled is LED 0, with subsequent LEDs following on in numerical order. Each
* timer uses the exact same callback function, with the timer ID being used
* within the callback function to determine which timer has actually expired
* (and therefore which LED to toggle).
*/
void vStartLEDFlashTimers( unsigned portBASE_TYPE uxNumberOfLEDs );
#endif /* FLASH_TIMER_H */

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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
#ifndef INTEGER_TASKS_H
#define INTEGER_TASKS_H
void vStartIntegerMathTasks( unsigned portBASE_TYPE uxPriority );
portBASE_TYPE xAreIntegerMathsTaskStillRunning( void );
#endif

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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
#ifndef PARTEST_H
#define PARTEST_H
#define partstDEFAULT_PORT_ADDRESS ( ( unsigned short ) 0x378 )
void vParTestInitialise( void );
void vParTestSetLED( unsigned portBASE_TYPE uxLED, signed portBASE_TYPE xValue );
void vParTestToggleLED( unsigned portBASE_TYPE uxLED );
#endif

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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
#ifndef RECURSIVE_MUTEX_TEST_H
#define RECURSIVE_MUTEX_TEST_H
void vStartRecursiveMutexTasks( void );
portBASE_TYPE xAreRecursiveMutexTasksStillRunning( void );
#endif

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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
#ifndef SEMAPHORE_TEST_H
#define SEMAPHORE_TEST_H
void vStartSemaphoreTasks( unsigned portBASE_TYPE uxPriority );
portBASE_TYPE xAreSemaphoreTasksStillRunning( void );
#endif

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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
/*
* This version of integer. c is for use on systems that have limited stack
* space and no display facilities. The complete version can be found in
* the Demo/Common/Full directory.
*
* As with the full version, the tasks created in this file are a good test
* of the scheduler context switch mechanism. The processor has to access
* 32bit variables in two or four chunks (depending on the processor). The low
* priority of these tasks means there is a high probability that a context
* switch will occur mid calculation. See flop. c documentation for
* more information.
*
*/
/*
Changes from V1.2.1
+ The constants used in the calculations are larger to ensure the
optimiser does not truncate them to 16 bits.
Changes from V1.2.3
+ uxTaskCheck is now just used as a boolean. Instead of incrementing
the variable each cycle of the task, the variable is simply set to
true. sAreIntegerMathsTaskStillRunning() sets it back to false and
expects it to have been set back to true by the time it is called
again.
+ A division has been included in the calculation.
*/
#include <stdlib.h>
/* Scheduler include files. */
#include "FreeRTOS.h"
#include "task.h"
/* Demo program include files. */
#include "integer.h"
/* The constants used in the calculation. */
#define intgCONST1 ( ( long ) 123 )
#define intgCONST2 ( ( long ) 234567 )
#define intgCONST3 ( ( long ) -3 )
#define intgCONST4 ( ( long ) 7 )
#define intgEXPECTED_ANSWER ( ( ( intgCONST1 + intgCONST2 ) * intgCONST3 ) / intgCONST4 )
#define intgSTACK_SIZE configMINIMAL_STACK_SIZE
/* As this is the minimal version, we will only create one task. */
#define intgNUMBER_OF_TASKS ( 1 )
/* The task function. Repeatedly performs a 32 bit calculation, checking the
result against the expected result. If the result is incorrect then the
context switch must have caused some corruption. */
static portTASK_FUNCTION_PROTO( vCompeteingIntMathTask, pvParameters );
/* Variables that are set to true within the calculation task to indicate
that the task is still executing. The check task sets the variable back to
false, flagging an error if the variable is still false the next time it
is called. */
static volatile signed portBASE_TYPE xTaskCheck[ intgNUMBER_OF_TASKS ] = { ( signed portBASE_TYPE ) pdFALSE };
/*-----------------------------------------------------------*/
void vStartIntegerMathTasks( unsigned portBASE_TYPE uxPriority )
{
short sTask;
for( sTask = 0; sTask < intgNUMBER_OF_TASKS; sTask++ )
{
xTaskCreate( vCompeteingIntMathTask, ( signed char * ) "IntMath", intgSTACK_SIZE, ( void * ) &( xTaskCheck[ sTask ] ), uxPriority, ( xTaskHandle * ) NULL );
}
}
/*-----------------------------------------------------------*/
static portTASK_FUNCTION( vCompeteingIntMathTask, pvParameters )
{
/* These variables are all effectively set to constants so they are volatile to
ensure the compiler does not just get rid of them. */
volatile long lValue;
short sError = pdFALSE;
volatile signed portBASE_TYPE *pxTaskHasExecuted;
/* Set a pointer to the variable we are going to set to true each
iteration. This is also a good test of the parameter passing mechanism
within each port. */
pxTaskHasExecuted = ( volatile signed portBASE_TYPE * ) pvParameters;
/* Keep performing a calculation and checking the result against a constant. */
for( ;; )
{
/* Perform the calculation. This will store partial value in
registers, resulting in a good test of the context switch mechanism. */
lValue = intgCONST1;
lValue += intgCONST2;
/* Yield in case cooperative scheduling is being used. */
#if configUSE_PREEMPTION == 0
{
taskYIELD();
}
#endif
/* Finish off the calculation. */
lValue *= intgCONST3;
lValue /= intgCONST4;
/* If the calculation is found to be incorrect we stop setting the
TaskHasExecuted variable so the check task can see an error has
occurred. */
if( lValue != intgEXPECTED_ANSWER ) /*lint !e774 volatile used to prevent this being optimised out. */
{
sError = pdTRUE;
}
if( sError == pdFALSE )
{
/* We have not encountered any errors, so set the flag that show
we are still executing. This will be periodically cleared by
the check task. */
portENTER_CRITICAL();
*pxTaskHasExecuted = pdTRUE;
portEXIT_CRITICAL();
}
/* Yield in case cooperative scheduling is being used. */
#if configUSE_PREEMPTION == 0
{
taskYIELD();
}
#endif
}
}
/*-----------------------------------------------------------*/
/* This is called to check that all the created tasks are still running. */
portBASE_TYPE xAreIntegerMathsTaskStillRunning( void )
{
portBASE_TYPE xReturn = pdTRUE;
short sTask;
/* Check the maths tasks are still running by ensuring their check variables
are still being set to true. */
for( sTask = 0; sTask < intgNUMBER_OF_TASKS; sTask++ )
{
if( xTaskCheck[ sTask ] == pdFALSE )
{
/* The check has not incremented so an error exists. */
xReturn = pdFALSE;
}
/* Reset the check variable so we can tell if it has been set by
the next time around. */
xTaskCheck[ sTask ] = pdFALSE;
}
return xReturn;
}

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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
/*
The tasks defined on this page demonstrate the use of recursive mutexes.
For recursive mutex functionality the created mutex should be created using
xSemaphoreCreateRecursiveMutex(), then be manipulated
using the xSemaphoreTakeRecursive() and xSemaphoreGiveRecursive() API
functions.
This demo creates three tasks all of which access the same recursive mutex:
prvRecursiveMutexControllingTask() has the highest priority so executes
first and grabs the mutex. It then performs some recursive accesses -
between each of which it sleeps for a short period to let the lower
priority tasks execute. When it has completed its demo functionality
it gives the mutex back before suspending itself.
prvRecursiveMutexBlockingTask() attempts to access the mutex by performing
a blocking 'take'. The blocking task has a lower priority than the
controlling task so by the time it executes the mutex has already been
taken by the controlling task, causing the blocking task to block. It
does not unblock until the controlling task has given the mutex back,
and it does not actually run until the controlling task has suspended
itself (due to the relative priorities). When it eventually does obtain
the mutex all it does is give the mutex back prior to also suspending
itself. At this point both the controlling task and the blocking task are
suspended.
prvRecursiveMutexPollingTask() runs at the idle priority. It spins round
a tight loop attempting to obtain the mutex with a non-blocking call. As
the lowest priority task it will not successfully obtain the mutex until
both the controlling and blocking tasks are suspended. Once it eventually
does obtain the mutex it first unsuspends both the controlling task and
blocking task prior to giving the mutex back - resulting in the polling
task temporarily inheriting the controlling tasks priority.
*/
/* Scheduler include files. */
#include "FreeRTOS.h"
#include "task.h"
#include "semphr.h"
/* Demo app include files. */
#include "recmutex.h"
/* Priorities assigned to the three tasks. */
#define recmuCONTROLLING_TASK_PRIORITY ( tskIDLE_PRIORITY + 2 )
#define recmuBLOCKING_TASK_PRIORITY ( tskIDLE_PRIORITY + 1 )
#define recmuPOLLING_TASK_PRIORITY ( tskIDLE_PRIORITY + 0 )
/* The recursive call depth. */
#define recmuMAX_COUNT ( 10 )
/* Misc. */
#define recmuSHORT_DELAY ( 20 / portTICK_RATE_MS )
#define recmuNO_DELAY ( ( portTickType ) 0 )
#define recmuTWO_TICK_DELAY ( ( portTickType ) 2 )
/* The three tasks as described at the top of this file. */
static void prvRecursiveMutexControllingTask( void *pvParameters );
static void prvRecursiveMutexBlockingTask( void *pvParameters );
static void prvRecursiveMutexPollingTask( void *pvParameters );
/* The mutex used by the demo. */
static xSemaphoreHandle xMutex;
/* Variables used to detect and latch errors. */
static volatile portBASE_TYPE xErrorOccurred = pdFALSE, xControllingIsSuspended = pdFALSE, xBlockingIsSuspended = pdFALSE;
static volatile unsigned portBASE_TYPE uxControllingCycles = 0, uxBlockingCycles = 0, uxPollingCycles = 0;
/* Handles of the two higher priority tasks, required so they can be resumed
(unsuspended). */
static xTaskHandle xControllingTaskHandle, xBlockingTaskHandle;
/*-----------------------------------------------------------*/
void vStartRecursiveMutexTasks( void )
{
/* Just creates the mutex and the three tasks. */
xMutex = xSemaphoreCreateRecursiveMutex();
/* vQueueAddToRegistry() adds the mutex to the registry, if one is
in use. The registry is provided as a means for kernel aware
debuggers to locate mutex and has no purpose if a kernel aware debugger
is not being used. The call to vQueueAddToRegistry() will be removed
by the pre-processor if configQUEUE_REGISTRY_SIZE is not defined or is
defined to be less than 1. */
vQueueAddToRegistry( ( xQueueHandle ) xMutex, ( signed portCHAR * ) "Recursive_Mutex" );
if( xMutex != NULL )
{
xTaskCreate( prvRecursiveMutexControllingTask, ( signed portCHAR * ) "Rec1", configMINIMAL_STACK_SIZE, NULL, recmuCONTROLLING_TASK_PRIORITY, &xControllingTaskHandle );
xTaskCreate( prvRecursiveMutexBlockingTask, ( signed portCHAR * ) "Rec2", configMINIMAL_STACK_SIZE, NULL, recmuBLOCKING_TASK_PRIORITY, &xBlockingTaskHandle );
xTaskCreate( prvRecursiveMutexPollingTask, ( signed portCHAR * ) "Rec3", configMINIMAL_STACK_SIZE, NULL, recmuPOLLING_TASK_PRIORITY, NULL );
}
}
/*-----------------------------------------------------------*/
static void prvRecursiveMutexControllingTask( void *pvParameters )
{
unsigned portBASE_TYPE ux;
/* Just to remove compiler warning. */
( void ) pvParameters;
for( ;; )
{
/* Should not be able to 'give' the mutex, as we have not yet 'taken'
it. The first time through, the mutex will not have been used yet,
subsequent times through, at this point the mutex will be held by the
polling task. */
if( xSemaphoreGiveRecursive( xMutex ) == pdPASS )
{
xErrorOccurred = pdTRUE;
}
for( ux = 0; ux < recmuMAX_COUNT; ux++ )
{
/* We should now be able to take the mutex as many times as
we like.
The first time through the mutex will be immediately available, on
subsequent times through the mutex will be held by the polling task
at this point and this Take will cause the polling task to inherit
the priority of this task. In this case the block time must be
long enough to ensure the polling task will execute again before the
block time expires. If the block time does expire then the error
flag will be set here. */
if( xSemaphoreTakeRecursive( xMutex, recmuTWO_TICK_DELAY ) != pdPASS )
{
xErrorOccurred = pdTRUE;
}
/* Ensure the other task attempting to access the mutex (and the
other demo tasks) are able to execute to ensure they either block
(where a block time is specified) or return an error (where no
block time is specified) as the mutex is held by this task. */
vTaskDelay( recmuSHORT_DELAY );
}
/* For each time we took the mutex, give it back. */
for( ux = 0; ux < recmuMAX_COUNT; ux++ )
{
/* Ensure the other task attempting to access the mutex (and the
other demo tasks) are able to execute. */
vTaskDelay( recmuSHORT_DELAY );
/* We should now be able to give the mutex as many times as we
took it. When the mutex is available again the Blocking task
should be unblocked but not run because it has a lower priority
than this task. The polling task should also not run at this point
as it too has a lower priority than this task. */
if( xSemaphoreGiveRecursive( xMutex ) != pdPASS )
{
xErrorOccurred = pdTRUE;
}
}
/* Having given it back the same number of times as it was taken, we
should no longer be the mutex owner, so the next give sh ould fail. */
if( xSemaphoreGiveRecursive( xMutex ) == pdPASS )
{
xErrorOccurred = pdTRUE;
}
/* Keep count of the number of cycles this task has performed so a
stall can be detected. */
uxControllingCycles++;
/* Suspend ourselves to the blocking task can execute. */
xControllingIsSuspended = pdTRUE;
vTaskSuspend( NULL );
xControllingIsSuspended = pdFALSE;
}
}
/*-----------------------------------------------------------*/
static void prvRecursiveMutexBlockingTask( void *pvParameters )
{
/* Just to remove compiler warning. */
( void ) pvParameters;
for( ;; )
{
/* This task will run while the controlling task is blocked, and the
controlling task will block only once it has the mutex - therefore
this call should block until the controlling task has given up the
mutex, and not actually execute past this call until the controlling
task is suspended. */
if( xSemaphoreTakeRecursive( xMutex, portMAX_DELAY ) == pdPASS )
{
if( xControllingIsSuspended != pdTRUE )
{
/* Did not expect to execute until the controlling task was
suspended. */
xErrorOccurred = pdTRUE;
}
else
{
/* Give the mutex back before suspending ourselves to allow
the polling task to obtain the mutex. */
if( xSemaphoreGiveRecursive( xMutex ) != pdPASS )
{
xErrorOccurred = pdTRUE;
}
xBlockingIsSuspended = pdTRUE;
vTaskSuspend( NULL );
xBlockingIsSuspended = pdFALSE;
}
}
else
{
/* We should not leave the xSemaphoreTakeRecursive() function
until the mutex was obtained. */
xErrorOccurred = pdTRUE;
}
/* The controlling and blocking tasks should be in lock step. */
if( uxControllingCycles != ( uxBlockingCycles + 1 ) )
{
xErrorOccurred = pdTRUE;
}
/* Keep count of the number of cycles this task has performed so a
stall can be detected. */
uxBlockingCycles++;
}
}
/*-----------------------------------------------------------*/
static void prvRecursiveMutexPollingTask( void *pvParameters )
{
/* Just to remove compiler warning. */
( void ) pvParameters;
for( ;; )
{
/* Keep attempting to obtain the mutex. We should only obtain it when
the blocking task has suspended itself, which in turn should only
happen when the controlling task is also suspended. */
if( xSemaphoreTakeRecursive( xMutex, recmuNO_DELAY ) == pdPASS )
{
/* Is the blocking task suspended? */
if( ( xBlockingIsSuspended != pdTRUE ) || ( xControllingIsSuspended != pdTRUE ) )
{
xErrorOccurred = pdTRUE;
}
else
{
/* Keep count of the number of cycles this task has performed
so a stall can be detected. */
uxPollingCycles++;
/* We can resume the other tasks here even though they have a
higher priority than the polling task. When they execute they
will attempt to obtain the mutex but fail because the polling
task is still the mutex holder. The polling task (this task)
will then inherit the higher priority. The Blocking task will
block indefinitely when it attempts to obtain the mutex, the
Controlling task will only block for a fixed period and an
error will be latched if the polling task has not returned the
mutex by the time this fixed period has expired. */
vTaskResume( xBlockingTaskHandle );
vTaskResume( xControllingTaskHandle );
/* The other two tasks should now have executed and no longer
be suspended. */
if( ( xBlockingIsSuspended == pdTRUE ) || ( xControllingIsSuspended == pdTRUE ) )
{
xErrorOccurred = pdTRUE;
}
/* Release the mutex, disinheriting the higher priority again. */
if( xSemaphoreGiveRecursive( xMutex ) != pdPASS )
{
xErrorOccurred = pdTRUE;
}
}
}
#if configUSE_PREEMPTION == 0
{
taskYIELD();
}
#endif
}
}
/*-----------------------------------------------------------*/
/* This is called to check that all the created tasks are still running. */
portBASE_TYPE xAreRecursiveMutexTasksStillRunning( void )
{
portBASE_TYPE xReturn;
static unsigned portBASE_TYPE uxLastControllingCycles = 0, uxLastBlockingCycles = 0, uxLastPollingCycles = 0;
/* Is the controlling task still cycling? */
if( uxLastControllingCycles == uxControllingCycles )
{
xErrorOccurred = pdTRUE;
}
else
{
uxLastControllingCycles = uxControllingCycles;
}
/* Is the blocking task still cycling? */
if( uxLastBlockingCycles == uxBlockingCycles )
{
xErrorOccurred = pdTRUE;
}
else
{
uxLastBlockingCycles = uxBlockingCycles;
}
/* Is the polling task still cycling? */
if( uxLastPollingCycles == uxPollingCycles )
{
xErrorOccurred = pdTRUE;
}
else
{
uxLastPollingCycles = uxPollingCycles;
}
if( xErrorOccurred == pdTRUE )
{
xReturn = pdFAIL;
}
else
{
xReturn = pdTRUE;
}
return xReturn;
}

297
FreeRTOS/Demo/CORTEX_M4_ATSAM4S_Atmel_Studio/src/Common-Demo-Source/semtest.c
Unescape Escape View File

@ -1,297 +0,0 @@
/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
/*
* Creates two sets of two tasks. The tasks within a set share a variable, access
* to which is guarded by a semaphore.
*
* Each task starts by attempting to obtain the semaphore. On obtaining a
* semaphore a task checks to ensure that the guarded variable has an expected
* value. It then clears the variable to zero before counting it back up to the
* expected value in increments of 1. After each increment the variable is checked
* to ensure it contains the value to which it was just set. When the starting
* value is again reached the task releases the semaphore giving the other task in
* the set a chance to do exactly the same thing. The starting value is high
* enough to ensure that a tick is likely to occur during the incrementing loop.
*
* An error is flagged if at any time during the process a shared variable is
* found to have a value other than that expected. Such an occurrence would
* suggest an error in the mutual exclusion mechanism by which access to the
* variable is restricted.
*
* The first set of two tasks poll their semaphore. The second set use blocking
* calls.
*
*/
#include <stdlib.h>
/* Scheduler include files. */
#include "FreeRTOS.h"
#include "task.h"
#include "semphr.h"
/* Demo app include files. */
#include "semtest.h"
/* The value to which the shared variables are counted. */
#define semtstBLOCKING_EXPECTED_VALUE ( ( unsigned long ) 0xfff )
#define semtstNON_BLOCKING_EXPECTED_VALUE ( ( unsigned long ) 0xff )
#define semtstSTACK_SIZE configMINIMAL_STACK_SIZE
#define semtstNUM_TASKS ( 4 )
#define semtstDELAY_FACTOR ( ( portTickType ) 10 )
/* The task function as described at the top of the file. */
static portTASK_FUNCTION_PROTO( prvSemaphoreTest, pvParameters );
/* Structure used to pass parameters to each task. */
typedef struct SEMAPHORE_PARAMETERS
{
xSemaphoreHandle xSemaphore;
volatile unsigned long *pulSharedVariable;
portTickType xBlockTime;
} xSemaphoreParameters;
/* Variables used to check that all the tasks are still running without errors. */
static volatile short sCheckVariables[ semtstNUM_TASKS ] = { 0 };
static volatile short sNextCheckVariable = 0;
/*-----------------------------------------------------------*/
void vStartSemaphoreTasks( unsigned portBASE_TYPE uxPriority )
{
xSemaphoreParameters *pxFirstSemaphoreParameters, *pxSecondSemaphoreParameters;
const portTickType xBlockTime = ( portTickType ) 100;
/* Create the structure used to pass parameters to the first two tasks. */
pxFirstSemaphoreParameters = ( xSemaphoreParameters * ) pvPortMalloc( sizeof( xSemaphoreParameters ) );
if( pxFirstSemaphoreParameters != NULL )
{
/* Create the semaphore used by the first two tasks. */
vSemaphoreCreateBinary( pxFirstSemaphoreParameters->xSemaphore );
if( pxFirstSemaphoreParameters->xSemaphore != NULL )
{
/* Create the variable which is to be shared by the first two tasks. */
pxFirstSemaphoreParameters->pulSharedVariable = ( unsigned long * ) pvPortMalloc( sizeof( unsigned long ) );
/* Initialise the share variable to the value the tasks expect. */
*( pxFirstSemaphoreParameters->pulSharedVariable ) = semtstNON_BLOCKING_EXPECTED_VALUE;
/* The first two tasks do not block on semaphore calls. */
pxFirstSemaphoreParameters->xBlockTime = ( portTickType ) 0;
/* Spawn the first two tasks. As they poll they operate at the idle priority. */
xTaskCreate( prvSemaphoreTest, ( signed char * ) "PolSEM1", semtstSTACK_SIZE, ( void * ) pxFirstSemaphoreParameters, tskIDLE_PRIORITY, ( xTaskHandle * ) NULL );
xTaskCreate( prvSemaphoreTest, ( signed char * ) "PolSEM2", semtstSTACK_SIZE, ( void * ) pxFirstSemaphoreParameters, tskIDLE_PRIORITY, ( xTaskHandle * ) NULL );
}
}
/* Do exactly the same to create the second set of tasks, only this time
provide a block time for the semaphore calls. */
pxSecondSemaphoreParameters = ( xSemaphoreParameters * ) pvPortMalloc( sizeof( xSemaphoreParameters ) );
if( pxSecondSemaphoreParameters != NULL )
{
vSemaphoreCreateBinary( pxSecondSemaphoreParameters->xSemaphore );
if( pxSecondSemaphoreParameters->xSemaphore != NULL )
{
pxSecondSemaphoreParameters->pulSharedVariable = ( unsigned long * ) pvPortMalloc( sizeof( unsigned long ) );
*( pxSecondSemaphoreParameters->pulSharedVariable ) = semtstBLOCKING_EXPECTED_VALUE;
pxSecondSemaphoreParameters->xBlockTime = xBlockTime / portTICK_RATE_MS;
xTaskCreate( prvSemaphoreTest, ( signed char * ) "BlkSEM1", semtstSTACK_SIZE, ( void * ) pxSecondSemaphoreParameters, uxPriority, ( xTaskHandle * ) NULL );
xTaskCreate( prvSemaphoreTest, ( signed char * ) "BlkSEM2", semtstSTACK_SIZE, ( void * ) pxSecondSemaphoreParameters, uxPriority, ( xTaskHandle * ) NULL );
}
}
/* vQueueAddToRegistry() adds the semaphore to the registry, if one is
in use. The registry is provided as a means for kernel aware
debuggers to locate semaphores and has no purpose if a kernel aware debugger
is not being used. The call to vQueueAddToRegistry() will be removed
by the pre-processor if configQUEUE_REGISTRY_SIZE is not defined or is
defined to be less than 1. */
vQueueAddToRegistry( ( xQueueHandle ) pxFirstSemaphoreParameters->xSemaphore, ( signed char * ) "Counting_Sem_1" );
vQueueAddToRegistry( ( xQueueHandle ) pxSecondSemaphoreParameters->xSemaphore, ( signed char * ) "Counting_Sem_2" );
}
/*-----------------------------------------------------------*/
static portTASK_FUNCTION( prvSemaphoreTest, pvParameters )
{
xSemaphoreParameters *pxParameters;
volatile unsigned long *pulSharedVariable, ulExpectedValue;
unsigned long ulCounter;
short sError = pdFALSE, sCheckVariableToUse;
/* See which check variable to use. sNextCheckVariable is not semaphore
protected! */
portENTER_CRITICAL();
sCheckVariableToUse = sNextCheckVariable;
sNextCheckVariable++;
portEXIT_CRITICAL();
/* A structure is passed in as the parameter. This contains the shared
variable being guarded. */
pxParameters = ( xSemaphoreParameters * ) pvParameters;
pulSharedVariable = pxParameters->pulSharedVariable;
/* If we are blocking we use a much higher count to ensure loads of context
switches occur during the count. */
if( pxParameters->xBlockTime > ( portTickType ) 0 )
{
ulExpectedValue = semtstBLOCKING_EXPECTED_VALUE;
}
else
{
ulExpectedValue = semtstNON_BLOCKING_EXPECTED_VALUE;
}
for( ;; )
{
/* Try to obtain the semaphore. */
if( xSemaphoreTake( pxParameters->xSemaphore, pxParameters->xBlockTime ) == pdPASS )
{
/* We have the semaphore and so expect any other tasks using the
shared variable to have left it in the state we expect to find
it. */
if( *pulSharedVariable != ulExpectedValue )
{
sError = pdTRUE;
}
/* Clear the variable, then count it back up to the expected value
before releasing the semaphore. Would expect a context switch or
two during this time. */
for( ulCounter = ( unsigned long ) 0; ulCounter <= ulExpectedValue; ulCounter++ )
{
*pulSharedVariable = ulCounter;
if( *pulSharedVariable != ulCounter )
{
sError = pdTRUE;
}
}
/* Release the semaphore, and if no errors have occurred increment the check
variable. */
if( xSemaphoreGive( pxParameters->xSemaphore ) == pdFALSE )
{
sError = pdTRUE;
}
if( sError == pdFALSE )
{
if( sCheckVariableToUse < semtstNUM_TASKS )
{
( sCheckVariables[ sCheckVariableToUse ] )++;
}
}
/* If we have a block time then we are running at a priority higher
than the idle priority. This task takes a long time to complete
a cycle (deliberately so to test the guarding) so will be starving
out lower priority tasks. Block for some time to allow give lower
priority tasks some processor time. */
vTaskDelay( pxParameters->xBlockTime * semtstDELAY_FACTOR );
}
else
{
if( pxParameters->xBlockTime == ( portTickType ) 0 )
{
/* We have not got the semaphore yet, so no point using the
processor. We are not blocking when attempting to obtain the
semaphore. */
taskYIELD();
}
}
}
}
/*-----------------------------------------------------------*/
/* This is called to check that all the created tasks are still running. */
portBASE_TYPE xAreSemaphoreTasksStillRunning( void )
{
static short sLastCheckVariables[ semtstNUM_TASKS ] = { 0 };
portBASE_TYPE xTask, xReturn = pdTRUE;
for( xTask = 0; xTask < semtstNUM_TASKS; xTask++ )
{
if( sLastCheckVariables[ xTask ] == sCheckVariables[ xTask ] )
{
xReturn = pdFALSE;
}
sLastCheckVariables[ xTask ] = sCheckVariables[ xTask ];
}
return xReturn;
}

522
FreeRTOS/Demo/CORTEX_M4_ATSAM4S_Atmel_Studio/src/asf/thirdparty/FreeRTOS/include/FreeRTOS.h vendored
Unescape Escape View File

@ -1,522 +0,0 @@
/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
#ifndef INC_FREERTOS_H
#define INC_FREERTOS_H
/*
* Include the generic headers required for the FreeRTOS port being used.
*/
#include <stddef.h>
/* Basic FreeRTOS definitions. */
#include "projdefs.h"
/* Application specific configuration options. */
#include "FreeRTOSConfig.h"
/* Definitions specific to the port being used. */
#include "portable.h"
/* Defines the prototype to which the application task hook function must
conform. */
typedef portBASE_TYPE (*pdTASK_HOOK_CODE)( void * );
/*
* Check all the required application specific macros have been defined.
* These macros are application specific and (as downloaded) are defined
* within FreeRTOSConfig.h.
*/
#ifndef configUSE_PREEMPTION
#error Missing definition: configUSE_PREEMPTION should be defined in FreeRTOSConfig.h as either 1 or 0. See the Configuration section of the FreeRTOS API documentation for details.
#endif
#ifndef configUSE_IDLE_HOOK
#error Missing definition: configUSE_IDLE_HOOK should be defined in FreeRTOSConfig.h as either 1 or 0. See the Configuration section of the FreeRTOS API documentation for details.
#endif
#ifndef configUSE_TICK_HOOK
#error Missing definition: configUSE_TICK_HOOK should be defined in FreeRTOSConfig.h as either 1 or 0. See the Configuration section of the FreeRTOS API documentation for details.
#endif
#ifndef configUSE_CO_ROUTINES
#error Missing definition: configUSE_CO_ROUTINES should be defined in FreeRTOSConfig.h as either 1 or 0. See the Configuration section of the FreeRTOS API documentation for details.
#endif
#ifndef INCLUDE_vTaskPrioritySet
#error Missing definition: INCLUDE_vTaskPrioritySet should be defined in FreeRTOSConfig.h as either 1 or 0. See the Configuration section of the FreeRTOS API documentation for details.
#endif
#ifndef INCLUDE_uxTaskPriorityGet
#error Missing definition: INCLUDE_uxTaskPriorityGet should be defined in FreeRTOSConfig.h as either 1 or 0. See the Configuration section of the FreeRTOS API documentation for details.
#endif
#ifndef INCLUDE_vTaskDelete
#error Missing definition: INCLUDE_vTaskDelete should be defined in FreeRTOSConfig.h as either 1 or 0. See the Configuration section of the FreeRTOS API documentation for details.
#endif
#ifndef INCLUDE_vTaskSuspend
#error Missing definition: INCLUDE_vTaskSuspend should be defined in FreeRTOSConfig.h as either 1 or 0. See the Configuration section of the FreeRTOS API documentation for details.
#endif
#ifndef INCLUDE_vTaskDelayUntil
#error Missing definition: INCLUDE_vTaskDelayUntil should be defined in FreeRTOSConfig.h as either 1 or 0. See the Configuration section of the FreeRTOS API documentation for details.
#endif
#ifndef INCLUDE_vTaskDelay
#error Missing definition: INCLUDE_vTaskDelay should be defined in FreeRTOSConfig.h as either 1 or 0. See the Configuration section of the FreeRTOS API documentation for details.
#endif
#ifndef configUSE_16_BIT_TICKS
#error Missing definition: configUSE_16_BIT_TICKS should be defined in FreeRTOSConfig.h as either 1 or 0. See the Configuration section of the FreeRTOS API documentation for details.
#endif
#ifndef INCLUDE_xTaskGetIdleTaskHandle
#define INCLUDE_xTaskGetIdleTaskHandle 0
#endif
#ifndef INCLUDE_xTimerGetTimerDaemonTaskHandle
#define INCLUDE_xTimerGetTimerDaemonTaskHandle 0
#endif
#ifndef INCLUDE_xQueueGetMutexHolder
#define INCLUDE_xQueueGetMutexHolder 0
#endif
#ifndef INCLUDE_pcTaskGetTaskName
#define INCLUDE_pcTaskGetTaskName 0
#endif
#ifndef configUSE_APPLICATION_TASK_TAG
#define configUSE_APPLICATION_TASK_TAG 0
#endif
#ifndef INCLUDE_uxTaskGetStackHighWaterMark
#define INCLUDE_uxTaskGetStackHighWaterMark 0
#endif
#ifndef configUSE_RECURSIVE_MUTEXES
#define configUSE_RECURSIVE_MUTEXES 0
#endif
#ifndef configUSE_MUTEXES
#define configUSE_MUTEXES 0
#endif
#ifndef configUSE_TIMERS
#define configUSE_TIMERS 0
#endif
#ifndef configUSE_COUNTING_SEMAPHORES
#define configUSE_COUNTING_SEMAPHORES 0
#endif
#ifndef configUSE_ALTERNATIVE_API
#define configUSE_ALTERNATIVE_API 0
#endif
#ifndef portCRITICAL_NESTING_IN_TCB
#define portCRITICAL_NESTING_IN_TCB 0
#endif
#ifndef configMAX_TASK_NAME_LEN
#define configMAX_TASK_NAME_LEN 16
#endif
#ifndef configIDLE_SHOULD_YIELD
#define configIDLE_SHOULD_YIELD 1
#endif
#if configMAX_TASK_NAME_LEN < 1
#error configMAX_TASK_NAME_LEN must be set to a minimum of 1 in FreeRTOSConfig.h
#endif
#ifndef INCLUDE_xTaskResumeFromISR
#define INCLUDE_xTaskResumeFromISR 1
#endif
#ifndef configASSERT
#define configASSERT( x )
#endif
#ifndef portALIGNMENT_ASSERT_pxCurrentTCB
#define portALIGNMENT_ASSERT_pxCurrentTCB configASSERT
#endif
/* The timers module relies on xTaskGetSchedulerState(). */
#if configUSE_TIMERS == 1
#ifndef configTIMER_TASK_PRIORITY
#error If configUSE_TIMERS is set to 1 then configTIMER_TASK_PRIORITY must also be defined.
#endif /* configTIMER_TASK_PRIORITY */
#ifndef configTIMER_QUEUE_LENGTH
#error If configUSE_TIMERS is set to 1 then configTIMER_QUEUE_LENGTH must also be defined.
#endif /* configTIMER_QUEUE_LENGTH */
#ifndef configTIMER_TASK_STACK_DEPTH
#error If configUSE_TIMERS is set to 1 then configTIMER_TASK_STACK_DEPTH must also be defined.
#endif /* configTIMER_TASK_STACK_DEPTH */
#endif /* configUSE_TIMERS */
#ifndef INCLUDE_xTaskGetSchedulerState
#define INCLUDE_xTaskGetSchedulerState 0
#endif
#ifndef INCLUDE_xTaskGetCurrentTaskHandle
#define INCLUDE_xTaskGetCurrentTaskHandle 0
#endif
#ifndef portSET_INTERRUPT_MASK_FROM_ISR
#define portSET_INTERRUPT_MASK_FROM_ISR() 0
#endif
#ifndef portCLEAR_INTERRUPT_MASK_FROM_ISR
#define portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedStatusValue ) ( void ) uxSavedStatusValue
#endif
#ifndef portCLEAN_UP_TCB
#define portCLEAN_UP_TCB( pxTCB ) ( void ) pxTCB
#endif
#ifndef portSETUP_TCB
#define portSETUP_TCB( pxTCB ) ( void ) pxTCB
#endif
#ifndef configQUEUE_REGISTRY_SIZE
#define configQUEUE_REGISTRY_SIZE 0U
#endif
#if ( configQUEUE_REGISTRY_SIZE < 1 )
#define vQueueAddToRegistry( xQueue, pcName )
#define vQueueUnregisterQueue( xQueue )
#endif
#ifndef portPOINTER_SIZE_TYPE
#define portPOINTER_SIZE_TYPE unsigned long
#endif
/* Remove any unused trace macros. */
#ifndef traceSTART
/* Used to perform any necessary initialisation - for example, open a file
into which trace is to be written. */
#define traceSTART()
#endif
#ifndef traceEND
/* Use to close a trace, for example close a file into which trace has been
written. */
#define traceEND()
#endif
#ifndef traceTASK_SWITCHED_IN
/* Called after a task has been selected to run. pxCurrentTCB holds a pointer
to the task control block of the selected task. */
#define traceTASK_SWITCHED_IN()
#endif
#ifndef traceTASK_SWITCHED_OUT
/* Called before a task has been selected to run. pxCurrentTCB holds a pointer
to the task control block of the task being switched out. */
#define traceTASK_SWITCHED_OUT()
#endif
#ifndef traceTASK_PRIORITY_INHERIT
/* Called when a task attempts to take a mutex that is already held by a
lower priority task. pxTCBOfMutexHolder is a pointer to the TCB of the task
that holds the mutex. uxInheritedPriority is the priority the mutex holder
will inherit (the priority of the task that is attempting to obtain the
muted. */
#define traceTASK_PRIORITY_INHERIT( pxTCBOfMutexHolder, uxInheritedPriority )
#endif
#ifndef traceTASK_PRIORITY_DISINHERIT
/* Called when a task releases a mutex, the holding of which had resulted in
the task inheriting the priority of a higher priority task.
pxTCBOfMutexHolder is a pointer to the TCB of the task that is releasing the
mutex. uxOriginalPriority is the task's configured (base) priority. */
#define traceTASK_PRIORITY_DISINHERIT( pxTCBOfMutexHolder, uxOriginalPriority )
#endif
#ifndef traceBLOCKING_ON_QUEUE_RECEIVE
/* Task is about to block because it cannot read from a
queue/mutex/semaphore. pxQueue is a pointer to the queue/mutex/semaphore
upon which the read was attempted. pxCurrentTCB points to the TCB of the
task that attempted the read. */
#define traceBLOCKING_ON_QUEUE_RECEIVE( pxQueue )
#endif
#ifndef traceBLOCKING_ON_QUEUE_SEND
/* Task is about to block because it cannot write to a
queue/mutex/semaphore. pxQueue is a pointer to the queue/mutex/semaphore
upon which the write was attempted. pxCurrentTCB points to the TCB of the
task that attempted the write. */
#define traceBLOCKING_ON_QUEUE_SEND( pxQueue )
#endif
#ifndef configCHECK_FOR_STACK_OVERFLOW
#define configCHECK_FOR_STACK_OVERFLOW 0
#endif
/* The following event macros are embedded in the kernel API calls. */
#ifndef traceMOVED_TASK_TO_READY_STATE
#define traceMOVED_TASK_TO_READY_STATE( pxTCB )
#endif
#ifndef traceQUEUE_CREATE
#define traceQUEUE_CREATE( pxNewQueue )
#endif
#ifndef traceQUEUE_CREATE_FAILED
#define traceQUEUE_CREATE_FAILED( ucQueueType )
#endif
#ifndef traceCREATE_MUTEX
#define traceCREATE_MUTEX( pxNewQueue )
#endif
#ifndef traceCREATE_MUTEX_FAILED
#define traceCREATE_MUTEX_FAILED()
#endif
#ifndef traceGIVE_MUTEX_RECURSIVE
#define traceGIVE_MUTEX_RECURSIVE( pxMutex )
#endif
#ifndef traceGIVE_MUTEX_RECURSIVE_FAILED
#define traceGIVE_MUTEX_RECURSIVE_FAILED( pxMutex )
#endif
#ifndef traceTAKE_MUTEX_RECURSIVE
#define traceTAKE_MUTEX_RECURSIVE( pxMutex )
#endif
#ifndef traceTAKE_MUTEX_RECURSIVE_FAILED
#define traceTAKE_MUTEX_RECURSIVE_FAILED( pxMutex )
#endif
#ifndef traceCREATE_COUNTING_SEMAPHORE
#define traceCREATE_COUNTING_SEMAPHORE()
#endif
#ifndef traceCREATE_COUNTING_SEMAPHORE_FAILED
#define traceCREATE_COUNTING_SEMAPHORE_FAILED()
#endif
#ifndef traceQUEUE_SEND
#define traceQUEUE_SEND( pxQueue )
#endif
#ifndef traceQUEUE_SEND_FAILED
#define traceQUEUE_SEND_FAILED( pxQueue )
#endif
#ifndef traceQUEUE_RECEIVE
#define traceQUEUE_RECEIVE( pxQueue )
#endif
#ifndef traceQUEUE_PEEK
#define traceQUEUE_PEEK( pxQueue )
#endif
#ifndef traceQUEUE_RECEIVE_FAILED
#define traceQUEUE_RECEIVE_FAILED( pxQueue )
#endif
#ifndef traceQUEUE_SEND_FROM_ISR
#define traceQUEUE_SEND_FROM_ISR( pxQueue )
#endif
#ifndef traceQUEUE_SEND_FROM_ISR_FAILED
#define traceQUEUE_SEND_FROM_ISR_FAILED( pxQueue )
#endif
#ifndef traceQUEUE_RECEIVE_FROM_ISR
#define traceQUEUE_RECEIVE_FROM_ISR( pxQueue )
#endif
#ifndef traceQUEUE_RECEIVE_FROM_ISR_FAILED
#define traceQUEUE_RECEIVE_FROM_ISR_FAILED( pxQueue )
#endif
#ifndef traceQUEUE_DELETE
#define traceQUEUE_DELETE( pxQueue )
#endif
#ifndef traceTASK_CREATE
#define traceTASK_CREATE( pxNewTCB )
#endif
#ifndef traceTASK_CREATE_FAILED
#define traceTASK_CREATE_FAILED()
#endif
#ifndef traceTASK_DELETE
#define traceTASK_DELETE( pxTaskToDelete )
#endif
#ifndef traceTASK_DELAY_UNTIL
#define traceTASK_DELAY_UNTIL()
#endif
#ifndef traceTASK_DELAY
#define traceTASK_DELAY()
#endif
#ifndef traceTASK_PRIORITY_SET
#define traceTASK_PRIORITY_SET( pxTask, uxNewPriority )
#endif
#ifndef traceTASK_SUSPEND
#define traceTASK_SUSPEND( pxTaskToSuspend )
#endif
#ifndef traceTASK_RESUME
#define traceTASK_RESUME( pxTaskToResume )
#endif
#ifndef traceTASK_RESUME_FROM_ISR
#define traceTASK_RESUME_FROM_ISR( pxTaskToResume )
#endif
#ifndef traceTASK_INCREMENT_TICK
#define traceTASK_INCREMENT_TICK( xTickCount )
#endif
#ifndef traceTIMER_CREATE
#define traceTIMER_CREATE( pxNewTimer )
#endif
#ifndef traceTIMER_CREATE_FAILED
#define traceTIMER_CREATE_FAILED()
#endif
#ifndef traceTIMER_COMMAND_SEND
#define traceTIMER_COMMAND_SEND( xTimer, xMessageID, xMessageValueValue, xReturn )
#endif
#ifndef traceTIMER_EXPIRED
#define traceTIMER_EXPIRED( pxTimer )
#endif
#ifndef traceTIMER_COMMAND_RECEIVED
#define traceTIMER_COMMAND_RECEIVED( pxTimer, xMessageID, xMessageValue )
#endif
#ifndef configGENERATE_RUN_TIME_STATS
#define configGENERATE_RUN_TIME_STATS 0
#endif
#if ( configGENERATE_RUN_TIME_STATS == 1 )
#ifndef portCONFIGURE_TIMER_FOR_RUN_TIME_STATS
#error If configGENERATE_RUN_TIME_STATS is defined then portCONFIGURE_TIMER_FOR_RUN_TIME_STATS must also be defined. portCONFIGURE_TIMER_FOR_RUN_TIME_STATS should call a port layer function to setup a peripheral timer/counter that can then be used as the run time counter time base.
#endif /* portCONFIGURE_TIMER_FOR_RUN_TIME_STATS */
#ifndef portGET_RUN_TIME_COUNTER_VALUE
#ifndef portALT_GET_RUN_TIME_COUNTER_VALUE
#error If configGENERATE_RUN_TIME_STATS is defined then either portGET_RUN_TIME_COUNTER_VALUE or portALT_GET_RUN_TIME_COUNTER_VALUE must also be defined. See the examples provided and the FreeRTOS web site for more information.
#endif /* portALT_GET_RUN_TIME_COUNTER_VALUE */
#endif /* portGET_RUN_TIME_COUNTER_VALUE */
#endif /* configGENERATE_RUN_TIME_STATS */
#ifndef portCONFIGURE_TIMER_FOR_RUN_TIME_STATS
#define portCONFIGURE_TIMER_FOR_RUN_TIME_STATS()
#endif
#ifndef configUSE_MALLOC_FAILED_HOOK
#define configUSE_MALLOC_FAILED_HOOK 0
#endif
#ifndef portPRIVILEGE_BIT
#define portPRIVILEGE_BIT ( ( unsigned portBASE_TYPE ) 0x00 )
#endif
#ifndef portYIELD_WITHIN_API
#define portYIELD_WITHIN_API portYIELD
#endif
#ifndef pvPortMallocAligned
#define pvPortMallocAligned( x, puxStackBuffer ) ( ( ( puxStackBuffer ) == NULL ) ? ( pvPortMalloc( ( x ) ) ) : ( puxStackBuffer ) )
#endif
#ifndef vPortFreeAligned
#define vPortFreeAligned( pvBlockToFree ) vPortFree( pvBlockToFree )
#endif
#endif /* INC_FREERTOS_H */

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FreeRTOS/Demo/CORTEX_M4_ATSAM4S_Atmel_Studio/src/asf/thirdparty/FreeRTOS/include/StackMacros.h vendored
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@ -1,181 +0,0 @@
/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
#ifndef STACK_MACROS_H
#define STACK_MACROS_H
/*
* Call the stack overflow hook function if the stack of the task being swapped
* out is currently overflowed, or looks like it might have overflowed in the
* past.
*
* Setting configCHECK_FOR_STACK_OVERFLOW to 1 will cause the macro to check
* the current stack state only - comparing the current top of stack value to
* the stack limit. Setting configCHECK_FOR_STACK_OVERFLOW to greater than 1
* will also cause the last few stack bytes to be checked to ensure the value
* to which the bytes were set when the task was created have not been
* overwritten. Note this second test does not guarantee that an overflowed
* stack will always be recognised.
*/
/*-----------------------------------------------------------*/
#if( configCHECK_FOR_STACK_OVERFLOW == 0 )
/* FreeRTOSConfig.h is not set to check for stack overflows. */
#define taskFIRST_CHECK_FOR_STACK_OVERFLOW()
#define taskSECOND_CHECK_FOR_STACK_OVERFLOW()
#endif /* configCHECK_FOR_STACK_OVERFLOW == 0 */
/*-----------------------------------------------------------*/
#if( configCHECK_FOR_STACK_OVERFLOW == 1 )
/* FreeRTOSConfig.h is only set to use the first method of
overflow checking. */
#define taskSECOND_CHECK_FOR_STACK_OVERFLOW()
#endif
/*-----------------------------------------------------------*/
#if( ( configCHECK_FOR_STACK_OVERFLOW > 0 ) && ( portSTACK_GROWTH < 0 ) )
/* Only the current stack state is to be checked. */
#define taskFIRST_CHECK_FOR_STACK_OVERFLOW() \
{ \
/* Is the currently saved stack pointer within the stack limit? */ \
if( pxCurrentTCB->pxTopOfStack <= pxCurrentTCB->pxStack ) \
{ \
vApplicationStackOverflowHook( ( xTaskHandle ) pxCurrentTCB, pxCurrentTCB->pcTaskName ); \
} \
}
#endif /* configCHECK_FOR_STACK_OVERFLOW > 0 */
/*-----------------------------------------------------------*/
#if( ( configCHECK_FOR_STACK_OVERFLOW > 0 ) && ( portSTACK_GROWTH > 0 ) )
/* Only the current stack state is to be checked. */
#define taskFIRST_CHECK_FOR_STACK_OVERFLOW() \
{ \
\
/* Is the currently saved stack pointer within the stack limit? */ \
if( pxCurrentTCB->pxTopOfStack >= pxCurrentTCB->pxEndOfStack ) \
{ \
vApplicationStackOverflowHook( ( xTaskHandle ) pxCurrentTCB, pxCurrentTCB->pcTaskName ); \
} \
}
#endif /* configCHECK_FOR_STACK_OVERFLOW == 1 */
/*-----------------------------------------------------------*/
#if( ( configCHECK_FOR_STACK_OVERFLOW > 1 ) && ( portSTACK_GROWTH < 0 ) )
#define taskSECOND_CHECK_FOR_STACK_OVERFLOW() \
{ \
static const unsigned char ucExpectedStackBytes[] = { tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, \
tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, \
tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, \
tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, \
tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE }; \
\
\
/* Has the extremity of the task stack ever been written over? */ \
if( memcmp( ( void * ) pxCurrentTCB->pxStack, ( void * ) ucExpectedStackBytes, sizeof( ucExpectedStackBytes ) ) != 0 ) \
{ \
vApplicationStackOverflowHook( ( xTaskHandle ) pxCurrentTCB, pxCurrentTCB->pcTaskName ); \
} \
}
#endif /* #if( configCHECK_FOR_STACK_OVERFLOW > 1 ) */
/*-----------------------------------------------------------*/
#if( ( configCHECK_FOR_STACK_OVERFLOW > 1 ) && ( portSTACK_GROWTH > 0 ) )
#define taskSECOND_CHECK_FOR_STACK_OVERFLOW() \
{ \
char *pcEndOfStack = ( char * ) pxCurrentTCB->pxEndOfStack; \
static const unsigned char ucExpectedStackBytes[] = { tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, \
tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, \
tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, \
tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, \
tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE }; \
\
\
pcEndOfStack -= sizeof( ucExpectedStackBytes ); \
\
/* Has the extremity of the task stack ever been written over? */ \
if( memcmp( ( void * ) pcEndOfStack, ( void * ) ucExpectedStackBytes, sizeof( ucExpectedStackBytes ) ) != 0 ) \
{ \
vApplicationStackOverflowHook( ( xTaskHandle ) pxCurrentTCB, pxCurrentTCB->pcTaskName ); \
} \
}
#endif /* #if( configCHECK_FOR_STACK_OVERFLOW > 1 ) */
/*-----------------------------------------------------------*/
#endif /* STACK_MACROS_H */

759
FreeRTOS/Demo/CORTEX_M4_ATSAM4S_Atmel_Studio/src/asf/thirdparty/FreeRTOS/include/croutine.h vendored
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@ -1,759 +0,0 @@
/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
#ifndef CO_ROUTINE_H
#define CO_ROUTINE_H
#ifndef INC_FREERTOS_H
#error "include FreeRTOS.h must appear in source files before include croutine.h"
#endif
#include "list.h"
#ifdef __cplusplus
extern "C" {
#endif
/* Used to hide the implementation of the co-routine control block. The
control block structure however has to be included in the header due to
the macro implementation of the co-routine functionality. */
typedef void * xCoRoutineHandle;
/* Defines the prototype to which co-routine functions must conform. */
typedef void (*crCOROUTINE_CODE)( xCoRoutineHandle, unsigned portBASE_TYPE );
typedef struct corCoRoutineControlBlock
{
crCOROUTINE_CODE pxCoRoutineFunction;
xListItem xGenericListItem; /*< List item used to place the CRCB in ready and blocked queues. */
xListItem xEventListItem; /*< List item used to place the CRCB in event lists. */
unsigned portBASE_TYPE uxPriority; /*< The priority of the co-routine in relation to other co-routines. */
unsigned portBASE_TYPE uxIndex; /*< Used to distinguish between co-routines when multiple co-routines use the same co-routine function. */
unsigned short uxState; /*< Used internally by the co-routine implementation. */
} corCRCB; /* Co-routine control block. Note must be identical in size down to uxPriority with tskTCB. */
/**
* croutine. h
*<pre>
portBASE_TYPE xCoRoutineCreate(
crCOROUTINE_CODE pxCoRoutineCode,
unsigned portBASE_TYPE uxPriority,
unsigned portBASE_TYPE uxIndex
);</pre>
*
* Create a new co-routine and add it to the list of co-routines that are
* ready to run.
*
* @param pxCoRoutineCode Pointer to the co-routine function. Co-routine
* functions require special syntax - see the co-routine section of the WEB
* documentation for more information.
*
* @param uxPriority The priority with respect to other co-routines at which
* the co-routine will run.
*
* @param uxIndex Used to distinguish between different co-routines that
* execute the same function. See the example below and the co-routine section
* of the WEB documentation for further information.
*
* @return pdPASS if the co-routine was successfully created and added to a ready
* list, otherwise an error code defined with ProjDefs.h.
*
* Example usage:
<pre>
// Co-routine to be created.
void vFlashCoRoutine( xCoRoutineHandle xHandle, unsigned portBASE_TYPE uxIndex )
{
// Variables in co-routines must be declared static if they must maintain value across a blocking call.
// This may not be necessary for const variables.
static const char cLedToFlash[ 2 ] = { 5, 6 };
static const portTickType uxFlashRates[ 2 ] = { 200, 400 };
// Must start every co-routine with a call to crSTART();
crSTART( xHandle );
for( ;; )
{
// This co-routine just delays for a fixed period, then toggles
// an LED. Two co-routines are created using this function, so
// the uxIndex parameter is used to tell the co-routine which
// LED to flash and how long to delay. This assumes xQueue has
// already been created.
vParTestToggleLED( cLedToFlash[ uxIndex ] );
crDELAY( xHandle, uxFlashRates[ uxIndex ] );
}
// Must end every co-routine with a call to crEND();
crEND();
}
// Function that creates two co-routines.
void vOtherFunction( void )
{
unsigned char ucParameterToPass;
xTaskHandle xHandle;
// Create two co-routines at priority 0. The first is given index 0
// so (from the code above) toggles LED 5 every 200 ticks. The second
// is given index 1 so toggles LED 6 every 400 ticks.
for( uxIndex = 0; uxIndex < 2; uxIndex++ )
{
xCoRoutineCreate( vFlashCoRoutine, 0, uxIndex );
}
}
</pre>
* \defgroup xCoRoutineCreate xCoRoutineCreate
* \ingroup Tasks
*/
signed portBASE_TYPE xCoRoutineCreate( crCOROUTINE_CODE pxCoRoutineCode, unsigned portBASE_TYPE uxPriority, unsigned portBASE_TYPE uxIndex );
/**
* croutine. h
*<pre>
void vCoRoutineSchedule( void );</pre>
*
* Run a co-routine.
*
* vCoRoutineSchedule() executes the highest priority co-routine that is able
* to run. The co-routine will execute until it either blocks, yields or is
* preempted by a task. Co-routines execute cooperatively so one
* co-routine cannot be preempted by another, but can be preempted by a task.
*
* If an application comprises of both tasks and co-routines then
* vCoRoutineSchedule should be called from the idle task (in an idle task
* hook).
*
* Example usage:
<pre>
// This idle task hook will schedule a co-routine each time it is called.
// The rest of the idle task will execute between co-routine calls.
void vApplicationIdleHook( void )
{
vCoRoutineSchedule();
}
// Alternatively, if you do not require any other part of the idle task to
// execute, the idle task hook can call vCoRoutineScheduler() within an
// infinite loop.
void vApplicationIdleHook( void )
{
for( ;; )
{
vCoRoutineSchedule();
}
}
</pre>
* \defgroup vCoRoutineSchedule vCoRoutineSchedule
* \ingroup Tasks
*/
void vCoRoutineSchedule( void );
/**
* croutine. h
* <pre>
crSTART( xCoRoutineHandle xHandle );</pre>
*
* This macro MUST always be called at the start of a co-routine function.
*
* Example usage:
<pre>
// Co-routine to be created.
void vACoRoutine( xCoRoutineHandle xHandle, unsigned portBASE_TYPE uxIndex )
{
// Variables in co-routines must be declared static if they must maintain value across a blocking call.
static long ulAVariable;
// Must start every co-routine with a call to crSTART();
crSTART( xHandle );
for( ;; )
{
// Co-routine functionality goes here.
}
// Must end every co-routine with a call to crEND();
crEND();
}</pre>
* \defgroup crSTART crSTART
* \ingroup Tasks
*/
#define crSTART( pxCRCB ) switch( ( ( corCRCB * )( pxCRCB ) )->uxState ) { case 0:
/**
* croutine. h
* <pre>
crEND();</pre>
*
* This macro MUST always be called at the end of a co-routine function.
*
* Example usage:
<pre>
// Co-routine to be created.
void vACoRoutine( xCoRoutineHandle xHandle, unsigned portBASE_TYPE uxIndex )
{
// Variables in co-routines must be declared static if they must maintain value across a blocking call.
static long ulAVariable;
// Must start every co-routine with a call to crSTART();
crSTART( xHandle );
for( ;; )
{
// Co-routine functionality goes here.
}
// Must end every co-routine with a call to crEND();
crEND();
}</pre>
* \defgroup crSTART crSTART
* \ingroup Tasks
*/
#define crEND() }
/*
* These macros are intended for internal use by the co-routine implementation
* only. The macros should not be used directly by application writers.
*/
#define crSET_STATE0( xHandle ) ( ( corCRCB * )( xHandle ) )->uxState = (__LINE__ * 2); return; case (__LINE__ * 2):
#define crSET_STATE1( xHandle ) ( ( corCRCB * )( xHandle ) )->uxState = ((__LINE__ * 2)+1); return; case ((__LINE__ * 2)+1):
/**
* croutine. h
*<pre>
crDELAY( xCoRoutineHandle xHandle, portTickType xTicksToDelay );</pre>
*
* Delay a co-routine for a fixed period of time.
*
* crDELAY can only be called from the co-routine function itself - not
* from within a function called by the co-routine function. This is because
* co-routines do not maintain their own stack.
*
* @param xHandle The handle of the co-routine to delay. This is the xHandle
* parameter of the co-routine function.
*
* @param xTickToDelay The number of ticks that the co-routine should delay
* for. The actual amount of time this equates to is defined by
* configTICK_RATE_HZ (set in FreeRTOSConfig.h). The constant portTICK_RATE_MS
* can be used to convert ticks to milliseconds.
*
* Example usage:
<pre>
// Co-routine to be created.
void vACoRoutine( xCoRoutineHandle xHandle, unsigned portBASE_TYPE uxIndex )
{
// Variables in co-routines must be declared static if they must maintain value across a blocking call.
// This may not be necessary for const variables.
// We are to delay for 200ms.
static const xTickType xDelayTime = 200 / portTICK_RATE_MS;
// Must start every co-routine with a call to crSTART();
crSTART( xHandle );
for( ;; )
{
// Delay for 200ms.
crDELAY( xHandle, xDelayTime );
// Do something here.
}
// Must end every co-routine with a call to crEND();
crEND();
}</pre>
* \defgroup crDELAY crDELAY
* \ingroup Tasks
*/
#define crDELAY( xHandle, xTicksToDelay ) \
if( ( xTicksToDelay ) > 0 ) \
{ \
vCoRoutineAddToDelayedList( ( xTicksToDelay ), NULL ); \
} \
crSET_STATE0( ( xHandle ) );
/**
* <pre>
crQUEUE_SEND(
xCoRoutineHandle xHandle,
xQueueHandle pxQueue,
void *pvItemToQueue,
portTickType xTicksToWait,
portBASE_TYPE *pxResult
)</pre>
*
* The macro's crQUEUE_SEND() and crQUEUE_RECEIVE() are the co-routine
* equivalent to the xQueueSend() and xQueueReceive() functions used by tasks.
*
* crQUEUE_SEND and crQUEUE_RECEIVE can only be used from a co-routine whereas
* xQueueSend() and xQueueReceive() can only be used from tasks.
*
* crQUEUE_SEND can only be called from the co-routine function itself - not
* from within a function called by the co-routine function. This is because
* co-routines do not maintain their own stack.
*
* See the co-routine section of the WEB documentation for information on
* passing data between tasks and co-routines and between ISR's and
* co-routines.
*
* @param xHandle The handle of the calling co-routine. This is the xHandle
* parameter of the co-routine function.
*
* @param pxQueue The handle of the queue on which the data will be posted.
* The handle is obtained as the return value when the queue is created using
* the xQueueCreate() API function.
*
* @param pvItemToQueue A pointer to the data being posted onto the queue.
* The number of bytes of each queued item is specified when the queue is
* created. This number of bytes is copied from pvItemToQueue into the queue
* itself.
*
* @param xTickToDelay The number of ticks that the co-routine should block
* to wait for space to become available on the queue, should space not be
* available immediately. The actual amount of time this equates to is defined
* by configTICK_RATE_HZ (set in FreeRTOSConfig.h). The constant
* portTICK_RATE_MS can be used to convert ticks to milliseconds (see example
* below).
*
* @param pxResult The variable pointed to by pxResult will be set to pdPASS if
* data was successfully posted onto the queue, otherwise it will be set to an
* error defined within ProjDefs.h.
*
* Example usage:
<pre>
// Co-routine function that blocks for a fixed period then posts a number onto
// a queue.
static void prvCoRoutineFlashTask( xCoRoutineHandle xHandle, unsigned portBASE_TYPE uxIndex )
{
// Variables in co-routines must be declared static if they must maintain value across a blocking call.
static portBASE_TYPE xNumberToPost = 0;
static portBASE_TYPE xResult;
// Co-routines must begin with a call to crSTART().
crSTART( xHandle );
for( ;; )
{
// This assumes the queue has already been created.
crQUEUE_SEND( xHandle, xCoRoutineQueue, &xNumberToPost, NO_DELAY, &xResult );
if( xResult != pdPASS )
{
// The message was not posted!
}
// Increment the number to be posted onto the queue.
xNumberToPost++;
// Delay for 100 ticks.
crDELAY( xHandle, 100 );
}
// Co-routines must end with a call to crEND().
crEND();
}</pre>
* \defgroup crQUEUE_SEND crQUEUE_SEND
* \ingroup Tasks
*/
#define crQUEUE_SEND( xHandle, pxQueue, pvItemToQueue, xTicksToWait, pxResult ) \
{ \
*( pxResult ) = xQueueCRSend( ( pxQueue) , ( pvItemToQueue) , ( xTicksToWait ) ); \
if( *( pxResult ) == errQUEUE_BLOCKED ) \
{ \
crSET_STATE0( ( xHandle ) ); \
*pxResult = xQueueCRSend( ( pxQueue ), ( pvItemToQueue ), 0 ); \
} \
if( *pxResult == errQUEUE_YIELD ) \
{ \
crSET_STATE1( ( xHandle ) ); \
*pxResult = pdPASS; \
} \
}
/**
* croutine. h
* <pre>
crQUEUE_RECEIVE(
xCoRoutineHandle xHandle,
xQueueHandle pxQueue,
void *pvBuffer,
portTickType xTicksToWait,
portBASE_TYPE *pxResult
)</pre>
*
* The macro's crQUEUE_SEND() and crQUEUE_RECEIVE() are the co-routine
* equivalent to the xQueueSend() and xQueueReceive() functions used by tasks.
*
* crQUEUE_SEND and crQUEUE_RECEIVE can only be used from a co-routine whereas
* xQueueSend() and xQueueReceive() can only be used from tasks.
*
* crQUEUE_RECEIVE can only be called from the co-routine function itself - not
* from within a function called by the co-routine function. This is because
* co-routines do not maintain their own stack.
*
* See the co-routine section of the WEB documentation for information on
* passing data between tasks and co-routines and between ISR's and
* co-routines.
*
* @param xHandle The handle of the calling co-routine. This is the xHandle
* parameter of the co-routine function.
*
* @param pxQueue The handle of the queue from which the data will be received.
* The handle is obtained as the return value when the queue is created using
* the xQueueCreate() API function.
*
* @param pvBuffer The buffer into which the received item is to be copied.
* The number of bytes of each queued item is specified when the queue is
* created. This number of bytes is copied into pvBuffer.
*
* @param xTickToDelay The number of ticks that the co-routine should block
* to wait for data to become available from the queue, should data not be
* available immediately. The actual amount of time this equates to is defined
* by configTICK_RATE_HZ (set in FreeRTOSConfig.h). The constant
* portTICK_RATE_MS can be used to convert ticks to milliseconds (see the
* crQUEUE_SEND example).
*
* @param pxResult The variable pointed to by pxResult will be set to pdPASS if
* data was successfully retrieved from the queue, otherwise it will be set to
* an error code as defined within ProjDefs.h.
*
* Example usage:
<pre>
// A co-routine receives the number of an LED to flash from a queue. It
// blocks on the queue until the number is received.
static void prvCoRoutineFlashWorkTask( xCoRoutineHandle xHandle, unsigned portBASE_TYPE uxIndex )
{
// Variables in co-routines must be declared static if they must maintain value across a blocking call.
static portBASE_TYPE xResult;
static unsigned portBASE_TYPE uxLEDToFlash;
// All co-routines must start with a call to crSTART().
crSTART( xHandle );
for( ;; )
{
// Wait for data to become available on the queue.
crQUEUE_RECEIVE( xHandle, xCoRoutineQueue, &uxLEDToFlash, portMAX_DELAY, &xResult );
if( xResult == pdPASS )
{
// We received the LED to flash - flash it!
vParTestToggleLED( uxLEDToFlash );
}
}
crEND();
}</pre>
* \defgroup crQUEUE_RECEIVE crQUEUE_RECEIVE
* \ingroup Tasks
*/
#define crQUEUE_RECEIVE( xHandle, pxQueue, pvBuffer, xTicksToWait, pxResult ) \
{ \
*( pxResult ) = xQueueCRReceive( ( pxQueue) , ( pvBuffer ), ( xTicksToWait ) ); \
if( *( pxResult ) == errQUEUE_BLOCKED ) \
{ \
crSET_STATE0( ( xHandle ) ); \
*( pxResult ) = xQueueCRReceive( ( pxQueue) , ( pvBuffer ), 0 ); \
} \
if( *( pxResult ) == errQUEUE_YIELD ) \
{ \
crSET_STATE1( ( xHandle ) ); \
*( pxResult ) = pdPASS; \
} \
}
/**
* croutine. h
* <pre>
crQUEUE_SEND_FROM_ISR(
xQueueHandle pxQueue,
void *pvItemToQueue,
portBASE_TYPE xCoRoutinePreviouslyWoken
)</pre>
*
* The macro's crQUEUE_SEND_FROM_ISR() and crQUEUE_RECEIVE_FROM_ISR() are the
* co-routine equivalent to the xQueueSendFromISR() and xQueueReceiveFromISR()
* functions used by tasks.
*
* crQUEUE_SEND_FROM_ISR() and crQUEUE_RECEIVE_FROM_ISR() can only be used to
* pass data between a co-routine and and ISR, whereas xQueueSendFromISR() and
* xQueueReceiveFromISR() can only be used to pass data between a task and and
* ISR.
*
* crQUEUE_SEND_FROM_ISR can only be called from an ISR to send data to a queue
* that is being used from within a co-routine.
*
* See the co-routine section of the WEB documentation for information on
* passing data between tasks and co-routines and between ISR's and
* co-routines.
*
* @param xQueue The handle to the queue on which the item is to be posted.
*
* @param pvItemToQueue A pointer to the item that is to be placed on the
* queue. The size of the items the queue will hold was defined when the
* queue was created, so this many bytes will be copied from pvItemToQueue
* into the queue storage area.
*
* @param xCoRoutinePreviouslyWoken This is included so an ISR can post onto
* the same queue multiple times from a single interrupt. The first call
* should always pass in pdFALSE. Subsequent calls should pass in
* the value returned from the previous call.
*
* @return pdTRUE if a co-routine was woken by posting onto the queue. This is
* used by the ISR to determine if a context switch may be required following
* the ISR.
*
* Example usage:
<pre>
// A co-routine that blocks on a queue waiting for characters to be received.
static void vReceivingCoRoutine( xCoRoutineHandle xHandle, unsigned portBASE_TYPE uxIndex )
{
char cRxedChar;
portBASE_TYPE xResult;
// All co-routines must start with a call to crSTART().
crSTART( xHandle );
for( ;; )
{
// Wait for data to become available on the queue. This assumes the
// queue xCommsRxQueue has already been created!
crQUEUE_RECEIVE( xHandle, xCommsRxQueue, &uxLEDToFlash, portMAX_DELAY, &xResult );
// Was a character received?
if( xResult == pdPASS )
{
// Process the character here.
}
}
// All co-routines must end with a call to crEND().
crEND();
}
// An ISR that uses a queue to send characters received on a serial port to
// a co-routine.
void vUART_ISR( void )
{
char cRxedChar;
portBASE_TYPE xCRWokenByPost = pdFALSE;
// We loop around reading characters until there are none left in the UART.
while( UART_RX_REG_NOT_EMPTY() )
{
// Obtain the character from the UART.
cRxedChar = UART_RX_REG;
// Post the character onto a queue. xCRWokenByPost will be pdFALSE
// the first time around the loop. If the post causes a co-routine
// to be woken (unblocked) then xCRWokenByPost will be set to pdTRUE.
// In this manner we can ensure that if more than one co-routine is
// blocked on the queue only one is woken by this ISR no matter how
// many characters are posted to the queue.
xCRWokenByPost = crQUEUE_SEND_FROM_ISR( xCommsRxQueue, &cRxedChar, xCRWokenByPost );
}
}</pre>
* \defgroup crQUEUE_SEND_FROM_ISR crQUEUE_SEND_FROM_ISR
* \ingroup Tasks
*/
#define crQUEUE_SEND_FROM_ISR( pxQueue, pvItemToQueue, xCoRoutinePreviouslyWoken ) xQueueCRSendFromISR( ( pxQueue ), ( pvItemToQueue ), ( xCoRoutinePreviouslyWoken ) )
/**
* croutine. h
* <pre>
crQUEUE_SEND_FROM_ISR(
xQueueHandle pxQueue,
void *pvBuffer,
portBASE_TYPE * pxCoRoutineWoken
)</pre>
*
* The macro's crQUEUE_SEND_FROM_ISR() and crQUEUE_RECEIVE_FROM_ISR() are the
* co-routine equivalent to the xQueueSendFromISR() and xQueueReceiveFromISR()
* functions used by tasks.
*
* crQUEUE_SEND_FROM_ISR() and crQUEUE_RECEIVE_FROM_ISR() can only be used to
* pass data between a co-routine and and ISR, whereas xQueueSendFromISR() and
* xQueueReceiveFromISR() can only be used to pass data between a task and and
* ISR.
*
* crQUEUE_RECEIVE_FROM_ISR can only be called from an ISR to receive data
* from a queue that is being used from within a co-routine (a co-routine
* posted to the queue).
*
* See the co-routine section of the WEB documentation for information on
* passing data between tasks and co-routines and between ISR's and
* co-routines.
*
* @param xQueue The handle to the queue on which the item is to be posted.
*
* @param pvBuffer A pointer to a buffer into which the received item will be
* placed. The size of the items the queue will hold was defined when the
* queue was created, so this many bytes will be copied from the queue into
* pvBuffer.
*
* @param pxCoRoutineWoken A co-routine may be blocked waiting for space to become
* available on the queue. If crQUEUE_RECEIVE_FROM_ISR causes such a
* co-routine to unblock *pxCoRoutineWoken will get set to pdTRUE, otherwise
* *pxCoRoutineWoken will remain unchanged.
*
* @return pdTRUE an item was successfully received from the queue, otherwise
* pdFALSE.
*
* Example usage:
<pre>
// A co-routine that posts a character to a queue then blocks for a fixed
// period. The character is incremented each time.
static void vSendingCoRoutine( xCoRoutineHandle xHandle, unsigned portBASE_TYPE uxIndex )
{
// cChar holds its value while this co-routine is blocked and must therefore
// be declared static.
static char cCharToTx = 'a';
portBASE_TYPE xResult;
// All co-routines must start with a call to crSTART().
crSTART( xHandle );
for( ;; )
{
// Send the next character to the queue.
crQUEUE_SEND( xHandle, xCoRoutineQueue, &cCharToTx, NO_DELAY, &xResult );
if( xResult == pdPASS )
{
// The character was successfully posted to the queue.
}
else
{
// Could not post the character to the queue.
}
// Enable the UART Tx interrupt to cause an interrupt in this
// hypothetical UART. The interrupt will obtain the character
// from the queue and send it.
ENABLE_RX_INTERRUPT();
// Increment to the next character then block for a fixed period.
// cCharToTx will maintain its value across the delay as it is
// declared static.
cCharToTx++;
if( cCharToTx > 'x' )
{
cCharToTx = 'a';
}
crDELAY( 100 );
}
// All co-routines must end with a call to crEND().
crEND();
}
// An ISR that uses a queue to receive characters to send on a UART.
void vUART_ISR( void )
{
char cCharToTx;
portBASE_TYPE xCRWokenByPost = pdFALSE;
while( UART_TX_REG_EMPTY() )
{
// Are there any characters in the queue waiting to be sent?
// xCRWokenByPost will automatically be set to pdTRUE if a co-routine
// is woken by the post - ensuring that only a single co-routine is
// woken no matter how many times we go around this loop.
if( crQUEUE_RECEIVE_FROM_ISR( pxQueue, &cCharToTx, &xCRWokenByPost ) )
{
SEND_CHARACTER( cCharToTx );
}
}
}</pre>
* \defgroup crQUEUE_RECEIVE_FROM_ISR crQUEUE_RECEIVE_FROM_ISR
* \ingroup Tasks
*/
#define crQUEUE_RECEIVE_FROM_ISR( pxQueue, pvBuffer, pxCoRoutineWoken ) xQueueCRReceiveFromISR( ( pxQueue ), ( pvBuffer ), ( pxCoRoutineWoken ) )
/*
* This function is intended for internal use by the co-routine macros only.
* The macro nature of the co-routine implementation requires that the
* prototype appears here. The function should not be used by application
* writers.
*
* Removes the current co-routine from its ready list and places it in the
* appropriate delayed list.
*/
void vCoRoutineAddToDelayedList( portTickType xTicksToDelay, xList *pxEventList );
/*
* This function is intended for internal use by the queue implementation only.
* The function should not be used by application writers.
*
* Removes the highest priority co-routine from the event list and places it in
* the pending ready list.
*/
signed portBASE_TYPE xCoRoutineRemoveFromEventList( const xList *pxEventList );
#ifdef __cplusplus
}
#endif
#endif /* CO_ROUTINE_H */

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FreeRTOS/Demo/CORTEX_M4_ATSAM4S_Atmel_Studio/src/asf/thirdparty/FreeRTOS/include/list.h vendored
Unescape Escape View File

@ -1,337 +0,0 @@
/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
/*
* This is the list implementation used by the scheduler. While it is tailored
* heavily for the schedulers needs, it is also available for use by
* application code.
*
* xLists can only store pointers to xListItems. Each xListItem contains a
* numeric value (xItemValue). Most of the time the lists are sorted in
* descending item value order.
*
* Lists are created already containing one list item. The value of this
* item is the maximum possible that can be stored, it is therefore always at
* the end of the list and acts as a marker. The list member pxHead always
* points to this marker - even though it is at the tail of the list. This
* is because the tail contains a wrap back pointer to the true head of
* the list.
*
* In addition to it's value, each list item contains a pointer to the next
* item in the list (pxNext), a pointer to the list it is in (pxContainer)
* and a pointer to back to the object that contains it. These later two
* pointers are included for efficiency of list manipulation. There is
* effectively a two way link between the object containing the list item and
* the list item itself.
*
*
* \page ListIntroduction List Implementation
* \ingroup FreeRTOSIntro
*/
#ifndef LIST_H
#define LIST_H
#ifdef __cplusplus
extern "C" {
#endif
/*
* Definition of the only type of object that a list can contain.
*/
struct xLIST_ITEM
{
portTickType xItemValue; /*< The value being listed. In most cases this is used to sort the list in descending order. */
volatile struct xLIST_ITEM * pxNext; /*< Pointer to the next xListItem in the list. */
volatile struct xLIST_ITEM * pxPrevious;/*< Pointer to the previous xListItem in the list. */
void * pvOwner; /*< Pointer to the object (normally a TCB) that contains the list item. There is therefore a two way link between the object containing the list item and the list item itself. */
void * pvContainer; /*< Pointer to the list in which this list item is placed (if any). */
};
typedef struct xLIST_ITEM xListItem; /* For some reason lint wants this as two separate definitions. */
struct xMINI_LIST_ITEM
{
portTickType xItemValue;
volatile struct xLIST_ITEM *pxNext;
volatile struct xLIST_ITEM *pxPrevious;
};
typedef struct xMINI_LIST_ITEM xMiniListItem;
/*
* Definition of the type of queue used by the scheduler.
*/
typedef struct xLIST
{
volatile unsigned portBASE_TYPE uxNumberOfItems;
volatile xListItem * pxIndex; /*< Used to walk through the list. Points to the last item returned by a call to pvListGetOwnerOfNextEntry (). */
volatile xMiniListItem xListEnd; /*< List item that contains the maximum possible item value meaning it is always at the end of the list and is therefore used as a marker. */
} xList;
/*
* Access macro to set the owner of a list item. The owner of a list item
* is the object (usually a TCB) that contains the list item.
*
* \page listSET_LIST_ITEM_OWNER listSET_LIST_ITEM_OWNER
* \ingroup LinkedList
*/
#define listSET_LIST_ITEM_OWNER( pxListItem, pxOwner ) ( pxListItem )->pvOwner = ( void * ) ( pxOwner )
/*
* Access macro to get the owner of a list item. The owner of a list item
* is the object (usually a TCB) that contains the list item.
*
* \page listSET_LIST_ITEM_OWNER listSET_LIST_ITEM_OWNER
* \ingroup LinkedList
*/
#define listGET_LIST_ITEM_OWNER( pxListItem ) ( pxListItem )->pvOwner
/*
* Access macro to set the value of the list item. In most cases the value is
* used to sort the list in descending order.
*
* \page listSET_LIST_ITEM_VALUE listSET_LIST_ITEM_VALUE
* \ingroup LinkedList
*/
#define listSET_LIST_ITEM_VALUE( pxListItem, xValue ) ( pxListItem )->xItemValue = ( xValue )
/*
* Access macro to retrieve the value of the list item. The value can
* represent anything - for example a the priority of a task, or the time at
* which a task should be unblocked.
*
* \page listGET_LIST_ITEM_VALUE listGET_LIST_ITEM_VALUE
* \ingroup LinkedList
*/
#define listGET_LIST_ITEM_VALUE( pxListItem ) ( ( pxListItem )->xItemValue )
/*
* Access macro the retrieve the value of the list item at the head of a given
* list.
*
* \page listGET_LIST_ITEM_VALUE listGET_LIST_ITEM_VALUE
* \ingroup LinkedList
*/
#define listGET_ITEM_VALUE_OF_HEAD_ENTRY( pxList ) ( (&( ( pxList )->xListEnd ))->pxNext->xItemValue )
/*
* Access macro to determine if a list contains any items. The macro will
* only have the value true if the list is empty.
*
* \page listLIST_IS_EMPTY listLIST_IS_EMPTY
* \ingroup LinkedList
*/
#define listLIST_IS_EMPTY( pxList ) ( ( pxList )->uxNumberOfItems == ( unsigned portBASE_TYPE ) 0 )
/*
* Access macro to return the number of items in the list.
*/
#define listCURRENT_LIST_LENGTH( pxList ) ( ( pxList )->uxNumberOfItems )
/*
* Access function to obtain the owner of the next entry in a list.
*
* The list member pxIndex is used to walk through a list. Calling
* listGET_OWNER_OF_NEXT_ENTRY increments pxIndex to the next item in the list
* and returns that entries pxOwner parameter. Using multiple calls to this
* function it is therefore possible to move through every item contained in
* a list.
*
* The pxOwner parameter of a list item is a pointer to the object that owns
* the list item. In the scheduler this is normally a task control block.
* The pxOwner parameter effectively creates a two way link between the list
* item and its owner.
*
* @param pxList The list from which the next item owner is to be returned.
*
* \page listGET_OWNER_OF_NEXT_ENTRY listGET_OWNER_OF_NEXT_ENTRY
* \ingroup LinkedList
*/
#define listGET_OWNER_OF_NEXT_ENTRY( pxTCB, pxList ) \
{ \
xList * const pxConstList = ( pxList ); \
/* Increment the index to the next item and return the item, ensuring */ \
/* we don't return the marker used at the end of the list. */ \
( pxConstList )->pxIndex = ( pxConstList )->pxIndex->pxNext; \
if( ( pxConstList )->pxIndex == ( xListItem * ) &( ( pxConstList )->xListEnd ) ) \
{ \
( pxConstList )->pxIndex = ( pxConstList )->pxIndex->pxNext; \
} \
( pxTCB ) = ( pxConstList )->pxIndex->pvOwner; \
}
/*
* Access function to obtain the owner of the first entry in a list. Lists
* are normally sorted in ascending item value order.
*
* This function returns the pxOwner member of the first item in the list.
* The pxOwner parameter of a list item is a pointer to the object that owns
* the list item. In the scheduler this is normally a task control block.
* The pxOwner parameter effectively creates a two way link between the list
* item and its owner.
*
* @param pxList The list from which the owner of the head item is to be
* returned.
*
* \page listGET_OWNER_OF_HEAD_ENTRY listGET_OWNER_OF_HEAD_ENTRY
* \ingroup LinkedList
*/
#define listGET_OWNER_OF_HEAD_ENTRY( pxList ) ( (&( ( pxList )->xListEnd ))->pxNext->pvOwner )
/*
* Check to see if a list item is within a list. The list item maintains a
* "container" pointer that points to the list it is in. All this macro does
* is check to see if the container and the list match.
*
* @param pxList The list we want to know if the list item is within.
* @param pxListItem The list item we want to know if is in the list.
* @return pdTRUE is the list item is in the list, otherwise pdFALSE.
* pointer against
*/
#define listIS_CONTAINED_WITHIN( pxList, pxListItem ) ( ( pxListItem )->pvContainer == ( void * ) ( pxList ) )
/*
* This provides a crude means of knowing if a list has been initialised, as
* pxList->xListEnd.xItemValue is set to portMAX_DELAY by the vListInitialise()
* function.
*/
#define listLIST_IS_INITIALISED( pxList ) ( ( pxList )->xListEnd.xItemValue == portMAX_DELAY )
/*
* Must be called before a list is used! This initialises all the members
* of the list structure and inserts the xListEnd item into the list as a
* marker to the back of the list.
*
* @param pxList Pointer to the list being initialised.
*
* \page vListInitialise vListInitialise
* \ingroup LinkedList
*/
void vListInitialise( xList *pxList );
/*
* Must be called before a list item is used. This sets the list container to
* null so the item does not think that it is already contained in a list.
*
* @param pxItem Pointer to the list item being initialised.
*
* \page vListInitialiseItem vListInitialiseItem
* \ingroup LinkedList
*/
void vListInitialiseItem( xListItem *pxItem );
/*
* Insert a list item into a list. The item will be inserted into the list in
* a position determined by its item value (descending item value order).
*
* @param pxList The list into which the item is to be inserted.
*
* @param pxNewListItem The item to that is to be placed in the list.
*
* \page vListInsert vListInsert
* \ingroup LinkedList
*/
void vListInsert( xList *pxList, xListItem *pxNewListItem );
/*
* Insert a list item into a list. The item will be inserted in a position
* such that it will be the last item within the list returned by multiple
* calls to listGET_OWNER_OF_NEXT_ENTRY.
*
* The list member pvIndex is used to walk through a list. Calling
* listGET_OWNER_OF_NEXT_ENTRY increments pvIndex to the next item in the list.
* Placing an item in a list using vListInsertEnd effectively places the item
* in the list position pointed to by pvIndex. This means that every other
* item within the list will be returned by listGET_OWNER_OF_NEXT_ENTRY before
* the pvIndex parameter again points to the item being inserted.
*
* @param pxList The list into which the item is to be inserted.
*
* @param pxNewListItem The list item to be inserted into the list.
*
* \page vListInsertEnd vListInsertEnd
* \ingroup LinkedList
*/
void vListInsertEnd( xList *pxList, xListItem *pxNewListItem );
/*
* Remove an item from a list. The list item has a pointer to the list that
* it is in, so only the list item need be passed into the function.
*
* @param vListRemove The item to be removed. The item will remove itself from
* the list pointed to by it's pxContainer parameter.
*
* \page vListRemove vListRemove
* \ingroup LinkedList
*/
void vListRemove( xListItem *pxItemToRemove );
#ifdef __cplusplus
}
#endif
#endif

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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
#ifndef MPU_WRAPPERS_H
#define MPU_WRAPPERS_H
/* This file redefines API functions to be called through a wrapper macro, but
only for ports that are using the MPU. */
#ifdef portUSING_MPU_WRAPPERS
/* MPU_WRAPPERS_INCLUDED_FROM_API_FILE will be defined when this file is
included from queue.c or task.c to prevent it from having an effect within
those files. */
#ifndef MPU_WRAPPERS_INCLUDED_FROM_API_FILE
#define xTaskGenericCreate MPU_xTaskGenericCreate
#define vTaskAllocateMPURegions MPU_vTaskAllocateMPURegions
#define vTaskDelete MPU_vTaskDelete
#define vTaskDelayUntil MPU_vTaskDelayUntil
#define vTaskDelay MPU_vTaskDelay
#define uxTaskPriorityGet MPU_uxTaskPriorityGet
#define vTaskPrioritySet MPU_vTaskPrioritySet
#define vTaskSuspend MPU_vTaskSuspend
#define xTaskIsTaskSuspended MPU_xTaskIsTaskSuspended
#define vTaskResume MPU_vTaskResume
#define vTaskSuspendAll MPU_vTaskSuspendAll
#define xTaskResumeAll MPU_xTaskResumeAll
#define xTaskGetTickCount MPU_xTaskGetTickCount
#define uxTaskGetNumberOfTasks MPU_uxTaskGetNumberOfTasks
#define vTaskList MPU_vTaskList
#define vTaskGetRunTimeStats MPU_vTaskGetRunTimeStats
#define vTaskStartTrace MPU_vTaskStartTrace
#define ulTaskEndTrace MPU_ulTaskEndTrace
#define vTaskSetApplicationTaskTag MPU_vTaskSetApplicationTaskTag
#define xTaskGetApplicationTaskTag MPU_xTaskGetApplicationTaskTag
#define xTaskCallApplicationTaskHook MPU_xTaskCallApplicationTaskHook
#define uxTaskGetStackHighWaterMark MPU_uxTaskGetStackHighWaterMark
#define xTaskGetCurrentTaskHandle MPU_xTaskGetCurrentTaskHandle
#define xTaskGetSchedulerState MPU_xTaskGetSchedulerState
#define xQueueGenericCreate MPU_xQueueGenericCreate
#define xQueueCreateMutex MPU_xQueueCreateMutex
#define xQueueGiveMutexRecursive MPU_xQueueGiveMutexRecursive
#define xQueueTakeMutexRecursive MPU_xQueueTakeMutexRecursive
#define xQueueCreateCountingSemaphore MPU_xQueueCreateCountingSemaphore
#define xQueueGenericSend MPU_xQueueGenericSend
#define xQueueAltGenericSend MPU_xQueueAltGenericSend
#define xQueueAltGenericReceive MPU_xQueueAltGenericReceive
#define xQueueGenericReceive MPU_xQueueGenericReceive
#define uxQueueMessagesWaiting MPU_uxQueueMessagesWaiting
#define vQueueDelete MPU_vQueueDelete
#define pvPortMalloc MPU_pvPortMalloc
#define vPortFree MPU_vPortFree
#define xPortGetFreeHeapSize MPU_xPortGetFreeHeapSize
#define vPortInitialiseBlocks MPU_vPortInitialiseBlocks
#if configQUEUE_REGISTRY_SIZE > 0
#define vQueueAddToRegistry MPU_vQueueAddToRegistry
#define vQueueUnregisterQueue MPU_vQueueUnregisterQueue
#endif
/* Remove the privileged function macro. */
#define PRIVILEGED_FUNCTION
#else /* MPU_WRAPPERS_INCLUDED_FROM_API_FILE */
/* Ensure API functions go in the privileged execution section. */
#define PRIVILEGED_FUNCTION __attribute__((section("privileged_functions")))
#define PRIVILEGED_DATA __attribute__((section("privileged_data")))
//#define PRIVILEGED_DATA
#endif /* MPU_WRAPPERS_INCLUDED_FROM_API_FILE */
#else /* portUSING_MPU_WRAPPERS */
#define PRIVILEGED_FUNCTION
#define PRIVILEGED_DATA
#define portUSING_MPU_WRAPPERS 0
#endif /* portUSING_MPU_WRAPPERS */
#endif /* MPU_WRAPPERS_H */

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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
/*-----------------------------------------------------------
* Portable layer API. Each function must be defined for each port.
*----------------------------------------------------------*/
#ifndef PORTABLE_H
#define PORTABLE_H
/* Include the macro file relevant to the port being used. */
#ifdef OPEN_WATCOM_INDUSTRIAL_PC_PORT
#include "..\..\Source\portable\owatcom\16bitdos\pc\portmacro.h"
typedef void ( __interrupt __far *pxISR )();
#endif
#ifdef OPEN_WATCOM_FLASH_LITE_186_PORT
#include "..\..\Source\portable\owatcom\16bitdos\flsh186\portmacro.h"
typedef void ( __interrupt __far *pxISR )();
#endif
#ifdef GCC_MEGA_AVR
#include "../portable/GCC/ATMega323/portmacro.h"
#endif
#ifdef IAR_MEGA_AVR
#include "../portable/IAR/ATMega323/portmacro.h"
#endif
#ifdef MPLAB_PIC24_PORT
#include "..\..\Source\portable\MPLAB\PIC24_dsPIC\portmacro.h"
#endif
#ifdef MPLAB_DSPIC_PORT
#include "..\..\Source\portable\MPLAB\PIC24_dsPIC\portmacro.h"
#endif
#ifdef MPLAB_PIC18F_PORT
#include "..\..\Source\portable\MPLAB\PIC18F\portmacro.h"
#endif
#ifdef MPLAB_PIC32MX_PORT
#include "..\..\Source\portable\MPLAB\PIC32MX\portmacro.h"
#endif
#ifdef _FEDPICC
#include "libFreeRTOS/Include/portmacro.h"
#endif
#ifdef SDCC_CYGNAL
#include "../../Source/portable/SDCC/Cygnal/portmacro.h"
#endif
#ifdef GCC_ARM7
#include "../../Source/portable/GCC/ARM7_LPC2000/portmacro.h"
#endif
#ifdef GCC_ARM7_ECLIPSE
#include "portmacro.h"
#endif
#ifdef ROWLEY_LPC23xx
#include "../../Source/portable/GCC/ARM7_LPC23xx/portmacro.h"
#endif
#ifdef IAR_MSP430
#include "..\..\Source\portable\IAR\MSP430\portmacro.h"
#endif
#ifdef GCC_MSP430
#include "../../Source/portable/GCC/MSP430F449/portmacro.h"
#endif
#ifdef ROWLEY_MSP430
#include "../../Source/portable/Rowley/MSP430F449/portmacro.h"
#endif
#ifdef ARM7_LPC21xx_KEIL_RVDS
#include "..\..\Source\portable\RVDS\ARM7_LPC21xx\portmacro.h"
#endif
#ifdef SAM7_GCC
#include "../../Source/portable/GCC/ARM7_AT91SAM7S/portmacro.h"
#endif
#ifdef SAM7_IAR
#include "..\..\Source\portable\IAR\AtmelSAM7S64\portmacro.h"
#endif
#ifdef SAM9XE_IAR
#include "..\..\Source\portable\IAR\AtmelSAM9XE\portmacro.h"
#endif
#ifdef LPC2000_IAR
#include "..\..\Source\portable\IAR\LPC2000\portmacro.h"
#endif
#ifdef STR71X_IAR
#include "..\..\Source\portable\IAR\STR71x\portmacro.h"
#endif
#ifdef STR75X_IAR
#include "..\..\Source\portable\IAR\STR75x\portmacro.h"
#endif
#ifdef STR75X_GCC
#include "..\..\Source\portable\GCC\STR75x\portmacro.h"
#endif
#ifdef STR91X_IAR
#include "..\..\Source\portable\IAR\STR91x\portmacro.h"
#endif
#ifdef GCC_H8S
#include "../../Source/portable/GCC/H8S2329/portmacro.h"
#endif
#ifdef GCC_AT91FR40008
#include "../../Source/portable/GCC/ARM7_AT91FR40008/portmacro.h"
#endif
#ifdef RVDS_ARMCM3_LM3S102
#include "../../Source/portable/RVDS/ARM_CM3/portmacro.h"
#endif
#ifdef GCC_ARMCM3_LM3S102
#include "../../Source/portable/GCC/ARM_CM3/portmacro.h"
#endif
#ifdef GCC_ARMCM3
#include "../../Source/portable/GCC/ARM_CM3/portmacro.h"
#endif
#ifdef IAR_ARM_CM3
#include "../../Source/portable/IAR/ARM_CM3/portmacro.h"
#endif
#ifdef IAR_ARMCM3_LM
#include "../../Source/portable/IAR/ARM_CM3/portmacro.h"
#endif
#ifdef HCS12_CODE_WARRIOR
#include "../../Source/portable/CodeWarrior/HCS12/portmacro.h"
#endif
#ifdef MICROBLAZE_GCC
#include "../../Source/portable/GCC/MicroBlaze/portmacro.h"
#endif
#ifdef TERN_EE
#include "..\..\Source\portable\Paradigm\Tern_EE\small\portmacro.h"
#endif
#ifdef GCC_HCS12
#include "../../Source/portable/GCC/HCS12/portmacro.h"
#endif
#ifdef GCC_MCF5235
#include "../../Source/portable/GCC/MCF5235/portmacro.h"
#endif
#ifdef COLDFIRE_V2_GCC
#include "../../../Source/portable/GCC/ColdFire_V2/portmacro.h"
#endif
#ifdef COLDFIRE_V2_CODEWARRIOR
#include "../../Source/portable/CodeWarrior/ColdFire_V2/portmacro.h"
#endif
#ifdef GCC_PPC405
#include "../../Source/portable/GCC/PPC405_Xilinx/portmacro.h"
#endif
#ifdef GCC_PPC440
#include "../../Source/portable/GCC/PPC440_Xilinx/portmacro.h"
#endif
#ifdef _16FX_SOFTUNE
#include "..\..\Source\portable\Softune\MB96340\portmacro.h"
#endif
#ifdef BCC_INDUSTRIAL_PC_PORT
/* A short file name has to be used in place of the normal
FreeRTOSConfig.h when using the Borland compiler. */
#include "frconfig.h"
#include "..\portable\BCC\16BitDOS\PC\prtmacro.h"
typedef void ( __interrupt __far *pxISR )();
#endif
#ifdef BCC_FLASH_LITE_186_PORT
/* A short file name has to be used in place of the normal
FreeRTOSConfig.h when using the Borland compiler. */
#include "frconfig.h"
#include "..\portable\BCC\16BitDOS\flsh186\prtmacro.h"
typedef void ( __interrupt __far *pxISR )();
#endif
#ifdef __GNUC__
#ifdef __AVR32_AVR32A__
#include "portmacro.h"
#endif
#endif
#ifdef __ICCAVR32__
#ifdef __CORE__
#if __CORE__ == __AVR32A__
#include "portmacro.h"
#endif
#endif
#endif
#ifdef __91467D
#include "portmacro.h"
#endif
#ifdef __96340
#include "portmacro.h"
#endif
#ifdef __IAR_V850ES_Fx3__
#include "../../Source/portable/IAR/V850ES/portmacro.h"
#endif
#ifdef __IAR_V850ES_Jx3__
#include "../../Source/portable/IAR/V850ES/portmacro.h"
#endif
#ifdef __IAR_V850ES_Jx3_L__
#include "../../Source/portable/IAR/V850ES/portmacro.h"
#endif
#ifdef __IAR_V850ES_Jx2__
#include "../../Source/portable/IAR/V850ES/portmacro.h"
#endif
#ifdef __IAR_V850ES_Hx2__
#include "../../Source/portable/IAR/V850ES/portmacro.h"
#endif
#ifdef __IAR_78K0R_Kx3__
#include "../../Source/portable/IAR/78K0R/portmacro.h"
#endif
#ifdef __IAR_78K0R_Kx3L__
#include "../../Source/portable/IAR/78K0R/portmacro.h"
#endif
/* Catch all to ensure portmacro.h is included in the build. Newer demos
have the path as part of the project options, rather than as relative from
the project location. If portENTER_CRITICAL() has not been defined then
portmacro.h has not yet been included - as every portmacro.h provides a
portENTER_CRITICAL() definition. Check the demo application for your demo
to find the path to the correct portmacro.h file. */
#ifndef portENTER_CRITICAL
#include "portmacro.h"
#endif
#if portBYTE_ALIGNMENT == 8
#define portBYTE_ALIGNMENT_MASK ( 0x0007 )
#endif
#if portBYTE_ALIGNMENT == 4
#define portBYTE_ALIGNMENT_MASK ( 0x0003 )
#endif
#if portBYTE_ALIGNMENT == 2
#define portBYTE_ALIGNMENT_MASK ( 0x0001 )
#endif
#if portBYTE_ALIGNMENT == 1
#define portBYTE_ALIGNMENT_MASK ( 0x0000 )
#endif
#ifndef portBYTE_ALIGNMENT_MASK
#error "Invalid portBYTE_ALIGNMENT definition"
#endif
#ifndef portNUM_CONFIGURABLE_REGIONS
#define portNUM_CONFIGURABLE_REGIONS 1
#endif
#ifdef __cplusplus
extern "C" {
#endif
#include "mpu_wrappers.h"
/*
* Setup the stack of a new task so it is ready to be placed under the
* scheduler control. The registers have to be placed on the stack in
* the order that the port expects to find them.
*
*/
#if( portUSING_MPU_WRAPPERS == 1 )
portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters, portBASE_TYPE xRunPrivileged ) PRIVILEGED_FUNCTION;
#else
portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters );
#endif
/*
* Map to the memory management routines required for the port.
*/
void *pvPortMalloc( size_t xSize ) PRIVILEGED_FUNCTION;
void vPortFree( void *pv ) PRIVILEGED_FUNCTION;
void vPortInitialiseBlocks( void ) PRIVILEGED_FUNCTION;
size_t xPortGetFreeHeapSize( void ) PRIVILEGED_FUNCTION;
/*
* Setup the hardware ready for the scheduler to take control. This generally
* sets up a tick interrupt and sets timers for the correct tick frequency.
*/
portBASE_TYPE xPortStartScheduler( void ) PRIVILEGED_FUNCTION;
/*
* Undo any hardware/ISR setup that was performed by xPortStartScheduler() so
* the hardware is left in its original condition after the scheduler stops
* executing.
*/
void vPortEndScheduler( void ) PRIVILEGED_FUNCTION;
/*
* The structures and methods of manipulating the MPU are contained within the
* port layer.
*
* Fills the xMPUSettings structure with the memory region information
* contained in xRegions.
*/
#if( portUSING_MPU_WRAPPERS == 1 )
struct xMEMORY_REGION;
void vPortStoreTaskMPUSettings( xMPU_SETTINGS *xMPUSettings, const struct xMEMORY_REGION * const xRegions, portSTACK_TYPE *pxBottomOfStack, unsigned short usStackDepth ) PRIVILEGED_FUNCTION;
#endif
#ifdef __cplusplus
}
#endif
#endif /* PORTABLE_H */

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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
#ifndef PROJDEFS_H
#define PROJDEFS_H
/* Defines the prototype to which task functions must conform. */
typedef void (*pdTASK_CODE)( void * );
#define pdTRUE ( 1 )
#define pdFALSE ( 0 )
#define pdPASS ( 1 )
#define pdFAIL ( 0 )
#define errQUEUE_EMPTY ( 0 )
#define errQUEUE_FULL ( 0 )
/* Error definitions. */
#define errCOULD_NOT_ALLOCATE_REQUIRED_MEMORY ( -1 )
#define errNO_TASK_TO_RUN ( -2 )
#define errQUEUE_BLOCKED ( -4 )
#define errQUEUE_YIELD ( -5 )
#endif /* PROJDEFS_H */

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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
#ifndef SEMAPHORE_H
#define SEMAPHORE_H
#ifndef INC_FREERTOS_H
#error "include FreeRTOS.h" must appear in source files before "include semphr.h"
#endif
#include "queue.h"
typedef xQueueHandle xSemaphoreHandle;
#define semBINARY_SEMAPHORE_QUEUE_LENGTH ( ( unsigned char ) 1U )
#define semSEMAPHORE_QUEUE_ITEM_LENGTH ( ( unsigned char ) 0U )
#define semGIVE_BLOCK_TIME ( ( portTickType ) 0U )
/**
* semphr. h
* <pre>vSemaphoreCreateBinary( xSemaphoreHandle xSemaphore )</pre>
*
* <i>Macro</i> that implements a semaphore by using the existing queue mechanism.
* The queue length is 1 as this is a binary semaphore. The data size is 0
* as we don't want to actually store any data - we just want to know if the
* queue is empty or full.
*
* This type of semaphore can be used for pure synchronisation between tasks or
* between an interrupt and a task. The semaphore need not be given back once
* obtained, so one task/interrupt can continuously 'give' the semaphore while
* another continuously 'takes' the semaphore. For this reason this type of
* semaphore does not use a priority inheritance mechanism. For an alternative
* that does use priority inheritance see xSemaphoreCreateMutex().
*
* @param xSemaphore Handle to the created semaphore. Should be of type xSemaphoreHandle.
*
* Example usage:
<pre>
xSemaphoreHandle xSemaphore;
void vATask( void * pvParameters )
{
// Semaphore cannot be used before a call to vSemaphoreCreateBinary ().
// This is a macro so pass the variable in directly.
vSemaphoreCreateBinary( xSemaphore );
if( xSemaphore != NULL )
{
// The semaphore was created successfully.
// The semaphore can now be used.
}
}
</pre>
* \defgroup vSemaphoreCreateBinary vSemaphoreCreateBinary
* \ingroup Semaphores
*/
#define vSemaphoreCreateBinary( xSemaphore ) \
{ \
( xSemaphore ) = xQueueGenericCreate( ( unsigned portBASE_TYPE ) 1, semSEMAPHORE_QUEUE_ITEM_LENGTH, queueQUEUE_TYPE_BINARY_SEMAPHORE ); \
if( ( xSemaphore ) != NULL ) \
{ \
xSemaphoreGive( ( xSemaphore ) ); \
} \
}
/**
* semphr. h
* <pre>xSemaphoreTake(
* xSemaphoreHandle xSemaphore,
* portTickType xBlockTime
* )</pre>
*
* <i>Macro</i> to obtain a semaphore. The semaphore must have previously been
* created with a call to vSemaphoreCreateBinary(), xSemaphoreCreateMutex() or
* xSemaphoreCreateCounting().
*
* @param xSemaphore A handle to the semaphore being taken - obtained when
* the semaphore was created.
*
* @param xBlockTime The time in ticks to wait for the semaphore to become
* available. The macro portTICK_RATE_MS can be used to convert this to a
* real time. A block time of zero can be used to poll the semaphore. A block
* time of portMAX_DELAY can be used to block indefinitely (provided
* INCLUDE_vTaskSuspend is set to 1 in FreeRTOSConfig.h).
*
* @return pdTRUE if the semaphore was obtained. pdFALSE
* if xBlockTime expired without the semaphore becoming available.
*
* Example usage:
<pre>
xSemaphoreHandle xSemaphore = NULL;
// A task that creates a semaphore.
void vATask( void * pvParameters )
{
// Create the semaphore to guard a shared resource.
vSemaphoreCreateBinary( xSemaphore );
}
// A task that uses the semaphore.
void vAnotherTask( void * pvParameters )
{
// ... Do other things.
if( xSemaphore != NULL )
{
// See if we can obtain the semaphore. If the semaphore is not available
// wait 10 ticks to see if it becomes free.
if( xSemaphoreTake( xSemaphore, ( portTickType ) 10 ) == pdTRUE )
{
// We were able to obtain the semaphore and can now access the
// shared resource.
// ...
// We have finished accessing the shared resource. Release the
// semaphore.
xSemaphoreGive( xSemaphore );
}
else
{
// We could not obtain the semaphore and can therefore not access
// the shared resource safely.
}
}
}
</pre>
* \defgroup xSemaphoreTake xSemaphoreTake
* \ingroup Semaphores
*/
#define xSemaphoreTake( xSemaphore, xBlockTime ) xQueueGenericReceive( ( xQueueHandle ) ( xSemaphore ), NULL, ( xBlockTime ), pdFALSE )
/**
* semphr. h
* xSemaphoreTakeRecursive(
* xSemaphoreHandle xMutex,
* portTickType xBlockTime
* )
*
* <i>Macro</i> to recursively obtain, or 'take', a mutex type semaphore.
* The mutex must have previously been created using a call to
* xSemaphoreCreateRecursiveMutex();
*
* configUSE_RECURSIVE_MUTEXES must be set to 1 in FreeRTOSConfig.h for this
* macro to be available.
*
* This macro must not be used on mutexes created using xSemaphoreCreateMutex().
*
* A mutex used recursively can be 'taken' repeatedly by the owner. The mutex
* doesn't become available again until the owner has called
* xSemaphoreGiveRecursive() for each successful 'take' request. For example,
* if a task successfully 'takes' the same mutex 5 times then the mutex will
* not be available to any other task until it has also 'given' the mutex back
* exactly five times.
*
* @param xMutex A handle to the mutex being obtained. This is the
* handle returned by xSemaphoreCreateRecursiveMutex();
*
* @param xBlockTime The time in ticks to wait for the semaphore to become
* available. The macro portTICK_RATE_MS can be used to convert this to a
* real time. A block time of zero can be used to poll the semaphore. If
* the task already owns the semaphore then xSemaphoreTakeRecursive() will
* return immediately no matter what the value of xBlockTime.
*
* @return pdTRUE if the semaphore was obtained. pdFALSE if xBlockTime
* expired without the semaphore becoming available.
*
* Example usage:
<pre>
xSemaphoreHandle xMutex = NULL;
// A task that creates a mutex.
void vATask( void * pvParameters )
{
// Create the mutex to guard a shared resource.
xMutex = xSemaphoreCreateRecursiveMutex();
}
// A task that uses the mutex.
void vAnotherTask( void * pvParameters )
{
// ... Do other things.
if( xMutex != NULL )
{
// See if we can obtain the mutex. If the mutex is not available
// wait 10 ticks to see if it becomes free.
if( xSemaphoreTakeRecursive( xSemaphore, ( portTickType ) 10 ) == pdTRUE )
{
// We were able to obtain the mutex and can now access the
// shared resource.
// ...
// For some reason due to the nature of the code further calls to
// xSemaphoreTakeRecursive() are made on the same mutex. In real
// code these would not be just sequential calls as this would make
// no sense. Instead the calls are likely to be buried inside
// a more complex call structure.
xSemaphoreTakeRecursive( xMutex, ( portTickType ) 10 );
xSemaphoreTakeRecursive( xMutex, ( portTickType ) 10 );
// The mutex has now been 'taken' three times, so will not be
// available to another task until it has also been given back
// three times. Again it is unlikely that real code would have
// these calls sequentially, but instead buried in a more complex
// call structure. This is just for illustrative purposes.
xSemaphoreGiveRecursive( xMutex );
xSemaphoreGiveRecursive( xMutex );
xSemaphoreGiveRecursive( xMutex );
// Now the mutex can be taken by other tasks.
}
else
{
// We could not obtain the mutex and can therefore not access
// the shared resource safely.
}
}
}
</pre>
* \defgroup xSemaphoreTakeRecursive xSemaphoreTakeRecursive
* \ingroup Semaphores
*/
#define xSemaphoreTakeRecursive( xMutex, xBlockTime ) xQueueTakeMutexRecursive( ( xMutex ), ( xBlockTime ) )
/*
* xSemaphoreAltTake() is an alternative version of xSemaphoreTake().
*
* The source code that implements the alternative (Alt) API is much
* simpler because it executes everything from within a critical section.
* This is the approach taken by many other RTOSes, but FreeRTOS.org has the
* preferred fully featured API too. The fully featured API has more
* complex code that takes longer to execute, but makes much less use of
* critical sections. Therefore the alternative API sacrifices interrupt
* responsiveness to gain execution speed, whereas the fully featured API
* sacrifices execution speed to ensure better interrupt responsiveness.
*/
#define xSemaphoreAltTake( xSemaphore, xBlockTime ) xQueueAltGenericReceive( ( xQueueHandle ) ( xSemaphore ), NULL, ( xBlockTime ), pdFALSE )
/**
* semphr. h
* <pre>xSemaphoreGive( xSemaphoreHandle xSemaphore )</pre>
*
* <i>Macro</i> to release a semaphore. The semaphore must have previously been
* created with a call to vSemaphoreCreateBinary(), xSemaphoreCreateMutex() or
* xSemaphoreCreateCounting(). and obtained using sSemaphoreTake().
*
* This macro must not be used from an ISR. See xSemaphoreGiveFromISR () for
* an alternative which can be used from an ISR.
*
* This macro must also not be used on semaphores created using
* xSemaphoreCreateRecursiveMutex().
*
* @param xSemaphore A handle to the semaphore being released. This is the
* handle returned when the semaphore was created.
*
* @return pdTRUE if the semaphore was released. pdFALSE if an error occurred.
* Semaphores are implemented using queues. An error can occur if there is
* no space on the queue to post a message - indicating that the
* semaphore was not first obtained correctly.
*
* Example usage:
<pre>
xSemaphoreHandle xSemaphore = NULL;
void vATask( void * pvParameters )
{
// Create the semaphore to guard a shared resource.
vSemaphoreCreateBinary( xSemaphore );
if( xSemaphore != NULL )
{
if( xSemaphoreGive( xSemaphore ) != pdTRUE )
{
// We would expect this call to fail because we cannot give
// a semaphore without first "taking" it!
}
// Obtain the semaphore - don't block if the semaphore is not
// immediately available.
if( xSemaphoreTake( xSemaphore, ( portTickType ) 0 ) )
{
// We now have the semaphore and can access the shared resource.
// ...
// We have finished accessing the shared resource so can free the
// semaphore.
if( xSemaphoreGive( xSemaphore ) != pdTRUE )
{
// We would not expect this call to fail because we must have
// obtained the semaphore to get here.
}
}
}
}
</pre>
* \defgroup xSemaphoreGive xSemaphoreGive
* \ingroup Semaphores
*/
#define xSemaphoreGive( xSemaphore ) xQueueGenericSend( ( xQueueHandle ) ( xSemaphore ), NULL, semGIVE_BLOCK_TIME, queueSEND_TO_BACK )
/**
* semphr. h
* <pre>xSemaphoreGiveRecursive( xSemaphoreHandle xMutex )</pre>
*
* <i>Macro</i> to recursively release, or 'give', a mutex type semaphore.
* The mutex must have previously been created using a call to
* xSemaphoreCreateRecursiveMutex();
*
* configUSE_RECURSIVE_MUTEXES must be set to 1 in FreeRTOSConfig.h for this
* macro to be available.
*
* This macro must not be used on mutexes created using xSemaphoreCreateMutex().
*
* A mutex used recursively can be 'taken' repeatedly by the owner. The mutex
* doesn't become available again until the owner has called
* xSemaphoreGiveRecursive() for each successful 'take' request. For example,
* if a task successfully 'takes' the same mutex 5 times then the mutex will
* not be available to any other task until it has also 'given' the mutex back
* exactly five times.
*
* @param xMutex A handle to the mutex being released, or 'given'. This is the
* handle returned by xSemaphoreCreateMutex();
*
* @return pdTRUE if the semaphore was given.
*
* Example usage:
<pre>
xSemaphoreHandle xMutex = NULL;
// A task that creates a mutex.
void vATask( void * pvParameters )
{
// Create the mutex to guard a shared resource.
xMutex = xSemaphoreCreateRecursiveMutex();
}
// A task that uses the mutex.
void vAnotherTask( void * pvParameters )
{
// ... Do other things.
if( xMutex != NULL )
{
// See if we can obtain the mutex. If the mutex is not available
// wait 10 ticks to see if it becomes free.
if( xSemaphoreTakeRecursive( xMutex, ( portTickType ) 10 ) == pdTRUE )
{
// We were able to obtain the mutex and can now access the
// shared resource.
// ...
// For some reason due to the nature of the code further calls to
// xSemaphoreTakeRecursive() are made on the same mutex. In real
// code these would not be just sequential calls as this would make
// no sense. Instead the calls are likely to be buried inside
// a more complex call structure.
xSemaphoreTakeRecursive( xMutex, ( portTickType ) 10 );
xSemaphoreTakeRecursive( xMutex, ( portTickType ) 10 );
// The mutex has now been 'taken' three times, so will not be
// available to another task until it has also been given back
// three times. Again it is unlikely that real code would have
// these calls sequentially, it would be more likely that the calls
// to xSemaphoreGiveRecursive() would be called as a call stack
// unwound. This is just for demonstrative purposes.
xSemaphoreGiveRecursive( xMutex );
xSemaphoreGiveRecursive( xMutex );
xSemaphoreGiveRecursive( xMutex );
// Now the mutex can be taken by other tasks.
}
else
{
// We could not obtain the mutex and can therefore not access
// the shared resource safely.
}
}
}
</pre>
* \defgroup xSemaphoreGiveRecursive xSemaphoreGiveRecursive
* \ingroup Semaphores
*/
#define xSemaphoreGiveRecursive( xMutex ) xQueueGiveMutexRecursive( ( xMutex ) )
/*
* xSemaphoreAltGive() is an alternative version of xSemaphoreGive().
*
* The source code that implements the alternative (Alt) API is much
* simpler because it executes everything from within a critical section.
* This is the approach taken by many other RTOSes, but FreeRTOS.org has the
* preferred fully featured API too. The fully featured API has more
* complex code that takes longer to execute, but makes much less use of
* critical sections. Therefore the alternative API sacrifices interrupt
* responsiveness to gain execution speed, whereas the fully featured API
* sacrifices execution speed to ensure better interrupt responsiveness.
*/
#define xSemaphoreAltGive( xSemaphore ) xQueueAltGenericSend( ( xQueueHandle ) ( xSemaphore ), NULL, semGIVE_BLOCK_TIME, queueSEND_TO_BACK )
/**
* semphr. h
* <pre>
xSemaphoreGiveFromISR(
xSemaphoreHandle xSemaphore,
signed portBASE_TYPE *pxHigherPriorityTaskWoken
)</pre>
*
* <i>Macro</i> to release a semaphore. The semaphore must have previously been
* created with a call to vSemaphoreCreateBinary() or xSemaphoreCreateCounting().
*
* Mutex type semaphores (those created using a call to xSemaphoreCreateMutex())
* must not be used with this macro.
*
* This macro can be used from an ISR.
*
* @param xSemaphore A handle to the semaphore being released. This is the
* handle returned when the semaphore was created.
*
* @param pxHigherPriorityTaskWoken xSemaphoreGiveFromISR() will set
* *pxHigherPriorityTaskWoken to pdTRUE if giving the semaphore caused a task
* to unblock, and the unblocked task has a priority higher than the currently
* running task. If xSemaphoreGiveFromISR() sets this value to pdTRUE then
* a context switch should be requested before the interrupt is exited.
*
* @return pdTRUE if the semaphore was successfully given, otherwise errQUEUE_FULL.
*
* Example usage:
<pre>
\#define LONG_TIME 0xffff
\#define TICKS_TO_WAIT 10
xSemaphoreHandle xSemaphore = NULL;
// Repetitive task.
void vATask( void * pvParameters )
{
for( ;; )
{
// We want this task to run every 10 ticks of a timer. The semaphore
// was created before this task was started.
// Block waiting for the semaphore to become available.
if( xSemaphoreTake( xSemaphore, LONG_TIME ) == pdTRUE )
{
// It is time to execute.
// ...
// We have finished our task. Return to the top of the loop where
// we will block on the semaphore until it is time to execute
// again. Note when using the semaphore for synchronisation with an
// ISR in this manner there is no need to 'give' the semaphore back.
}
}
}
// Timer ISR
void vTimerISR( void * pvParameters )
{
static unsigned char ucLocalTickCount = 0;
static signed portBASE_TYPE xHigherPriorityTaskWoken;
// A timer tick has occurred.
// ... Do other time functions.
// Is it time for vATask () to run?
xHigherPriorityTaskWoken = pdFALSE;
ucLocalTickCount++;
if( ucLocalTickCount >= TICKS_TO_WAIT )
{
// Unblock the task by releasing the semaphore.
xSemaphoreGiveFromISR( xSemaphore, &xHigherPriorityTaskWoken );
// Reset the count so we release the semaphore again in 10 ticks time.
ucLocalTickCount = 0;
}
if( xHigherPriorityTaskWoken != pdFALSE )
{
// We can force a context switch here. Context switching from an
// ISR uses port specific syntax. Check the demo task for your port
// to find the syntax required.
}
}
</pre>
* \defgroup xSemaphoreGiveFromISR xSemaphoreGiveFromISR
* \ingroup Semaphores
*/
#define xSemaphoreGiveFromISR( xSemaphore, pxHigherPriorityTaskWoken ) xQueueGenericSendFromISR( ( xQueueHandle ) ( xSemaphore ), NULL, ( pxHigherPriorityTaskWoken ), queueSEND_TO_BACK )
/**
* semphr. h
* <pre>
xSemaphoreTakeFromISR(
xSemaphoreHandle xSemaphore,
signed portBASE_TYPE *pxHigherPriorityTaskWoken
)</pre>
*
* <i>Macro</i> to take a semaphore from an ISR. The semaphore must have
* previously been created with a call to vSemaphoreCreateBinary() or
* xSemaphoreCreateCounting().
*
* Mutex type semaphores (those created using a call to xSemaphoreCreateMutex())
* must not be used with this macro.
*
* This macro can be used from an ISR, however taking a semaphore from an ISR
* is not a common operation. It is likely to only be useful when taking a
* counting semaphore when an interrupt is obtaining an object from a resource
* pool (when the semaphore count indicates the number of resources available).
*
* @param xSemaphore A handle to the semaphore being taken. This is the
* handle returned when the semaphore was created.
*
* @param pxHigherPriorityTaskWoken xSemaphoreTakeFromISR() will set
* *pxHigherPriorityTaskWoken to pdTRUE if taking the semaphore caused a task
* to unblock, and the unblocked task has a priority higher than the currently
* running task. If xSemaphoreTakeFromISR() sets this value to pdTRUE then
* a context switch should be requested before the interrupt is exited.
*
* @return pdTRUE if the semaphore was successfully taken, otherwise
* pdFALSE
*/
#define xSemaphoreTakeFromISR( xSemaphore, pxHigherPriorityTaskWoken ) xQueueReceiveFromISR( ( xQueueHandle ) ( xSemaphore ), NULL, ( pxHigherPriorityTaskWoken ) )
/**
* semphr. h
* <pre>xSemaphoreHandle xSemaphoreCreateMutex( void )</pre>
*
* <i>Macro</i> that implements a mutex semaphore by using the existing queue
* mechanism.
*
* Mutexes created using this macro can be accessed using the xSemaphoreTake()
* and xSemaphoreGive() macros. The xSemaphoreTakeRecursive() and
* xSemaphoreGiveRecursive() macros should not be used.
*
* This type of semaphore uses a priority inheritance mechanism so a task
* 'taking' a semaphore MUST ALWAYS 'give' the semaphore back once the
* semaphore it is no longer required.
*
* Mutex type semaphores cannot be used from within interrupt service routines.
*
* See vSemaphoreCreateBinary() for an alternative implementation that can be
* used for pure synchronisation (where one task or interrupt always 'gives' the
* semaphore and another always 'takes' the semaphore) and from within interrupt
* service routines.
*
* @return xSemaphore Handle to the created mutex semaphore. Should be of type
* xSemaphoreHandle.
*
* Example usage:
<pre>
xSemaphoreHandle xSemaphore;
void vATask( void * pvParameters )
{
// Semaphore cannot be used before a call to xSemaphoreCreateMutex().
// This is a macro so pass the variable in directly.
xSemaphore = xSemaphoreCreateMutex();
if( xSemaphore != NULL )
{
// The semaphore was created successfully.
// The semaphore can now be used.
}
}
</pre>
* \defgroup vSemaphoreCreateMutex vSemaphoreCreateMutex
* \ingroup Semaphores
*/
#define xSemaphoreCreateMutex() xQueueCreateMutex( queueQUEUE_TYPE_MUTEX )
/**
* semphr. h
* <pre>xSemaphoreHandle xSemaphoreCreateRecursiveMutex( void )</pre>
*
* <i>Macro</i> that implements a recursive mutex by using the existing queue
* mechanism.
*
* Mutexes created using this macro can be accessed using the
* xSemaphoreTakeRecursive() and xSemaphoreGiveRecursive() macros. The
* xSemaphoreTake() and xSemaphoreGive() macros should not be used.
*
* A mutex used recursively can be 'taken' repeatedly by the owner. The mutex
* doesn't become available again until the owner has called
* xSemaphoreGiveRecursive() for each successful 'take' request. For example,
* if a task successfully 'takes' the same mutex 5 times then the mutex will
* not be available to any other task until it has also 'given' the mutex back
* exactly five times.
*
* This type of semaphore uses a priority inheritance mechanism so a task
* 'taking' a semaphore MUST ALWAYS 'give' the semaphore back once the
* semaphore it is no longer required.
*
* Mutex type semaphores cannot be used from within interrupt service routines.
*
* See vSemaphoreCreateBinary() for an alternative implementation that can be
* used for pure synchronisation (where one task or interrupt always 'gives' the
* semaphore and another always 'takes' the semaphore) and from within interrupt
* service routines.
*
* @return xSemaphore Handle to the created mutex semaphore. Should be of type
* xSemaphoreHandle.
*
* Example usage:
<pre>
xSemaphoreHandle xSemaphore;
void vATask( void * pvParameters )
{
// Semaphore cannot be used before a call to xSemaphoreCreateMutex().
// This is a macro so pass the variable in directly.
xSemaphore = xSemaphoreCreateRecursiveMutex();
if( xSemaphore != NULL )
{
// The semaphore was created successfully.
// The semaphore can now be used.
}
}
</pre>
* \defgroup vSemaphoreCreateMutex vSemaphoreCreateMutex
* \ingroup Semaphores
*/
#define xSemaphoreCreateRecursiveMutex() xQueueCreateMutex( queueQUEUE_TYPE_RECURSIVE_MUTEX )
/**
* semphr. h
* <pre>xSemaphoreHandle xSemaphoreCreateCounting( unsigned portBASE_TYPE uxMaxCount, unsigned portBASE_TYPE uxInitialCount )</pre>
*
* <i>Macro</i> that creates a counting semaphore by using the existing
* queue mechanism.
*
* Counting semaphores are typically used for two things:
*
* 1) Counting events.
*
* In this usage scenario an event handler will 'give' a semaphore each time
* an event occurs (incrementing the semaphore count value), and a handler
* task will 'take' a semaphore each time it processes an event
* (decrementing the semaphore count value). The count value is therefore
* the difference between the number of events that have occurred and the
* number that have been processed. In this case it is desirable for the
* initial count value to be zero.
*
* 2) Resource management.
*
* In this usage scenario the count value indicates the number of resources
* available. To obtain control of a resource a task must first obtain a
* semaphore - decrementing the semaphore count value. When the count value
* reaches zero there are no free resources. When a task finishes with the
* resource it 'gives' the semaphore back - incrementing the semaphore count
* value. In this case it is desirable for the initial count value to be
* equal to the maximum count value, indicating that all resources are free.
*
* @param uxMaxCount The maximum count value that can be reached. When the
* semaphore reaches this value it can no longer be 'given'.
*
* @param uxInitialCount The count value assigned to the semaphore when it is
* created.
*
* @return Handle to the created semaphore. Null if the semaphore could not be
* created.
*
* Example usage:
<pre>
xSemaphoreHandle xSemaphore;
void vATask( void * pvParameters )
{
xSemaphoreHandle xSemaphore = NULL;
// Semaphore cannot be used before a call to xSemaphoreCreateCounting().
// The max value to which the semaphore can count should be 10, and the
// initial value assigned to the count should be 0.
xSemaphore = xSemaphoreCreateCounting( 10, 0 );
if( xSemaphore != NULL )
{
// The semaphore was created successfully.
// The semaphore can now be used.
}
}
</pre>
* \defgroup xSemaphoreCreateCounting xSemaphoreCreateCounting
* \ingroup Semaphores
*/
#define xSemaphoreCreateCounting( uxMaxCount, uxInitialCount ) xQueueCreateCountingSemaphore( ( uxMaxCount ), ( uxInitialCount ) )
/**
* semphr. h
* <pre>void vSemaphoreDelete( xSemaphoreHandle xSemaphore );</pre>
*
* Delete a semaphore. This function must be used with care. For example,
* do not delete a mutex type semaphore if the mutex is held by a task.
*
* @param xSemaphore A handle to the semaphore to be deleted.
*
* \page vSemaphoreDelete vSemaphoreDelete
* \ingroup Semaphores
*/
#define vSemaphoreDelete( xSemaphore ) vQueueDelete( ( xQueueHandle ) ( xSemaphore ) )
/**
* semphr.h
* <pre>xTaskHandle xSemaphoreGetMutexHolder( xSemaphoreHandle xMutex );</pre>
*
* If xMutex is indeed a mutex type semaphore, return the current mutex holder.
* If xMutex is not a mutex type semaphore, or the mutex is available (not held
* by a task), return NULL.
*
* Note: This Is is a good way of determining if the calling task is the mutex
* holder, but not a good way of determining the identity of the mutex holder as
* the holder may change between the function exiting and the returned value
* being tested.
*/
#define xSemaphoreGetMutexHolder( xSemaphore ) xQueueGetMutexHolder( ( xSemaphore ) )
#endif /* SEMAPHORE_H */

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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
#ifndef TIMERS_H
#define TIMERS_H
#ifndef INC_FREERTOS_H
#error "include FreeRTOS.h must appear in source files before include timers.h"
#endif
#include "portable.h"
#include "list.h"
#include "task.h"
#ifdef __cplusplus
extern "C" {
#endif
/* IDs for commands that can be sent/received on the timer queue. These are to
be used solely through the macros that make up the public software timer API,
as defined below. */
#define tmrCOMMAND_START 0
#define tmrCOMMAND_STOP 1
#define tmrCOMMAND_CHANGE_PERIOD 2
#define tmrCOMMAND_DELETE 3
/*-----------------------------------------------------------
* MACROS AND DEFINITIONS
*----------------------------------------------------------*/
/**
* Type by which software timers are referenced. For example, a call to
* xTimerCreate() returns an xTimerHandle variable that can then be used to
* reference the subject timer in calls to other software timer API functions
* (for example, xTimerStart(), xTimerReset(), etc.).
*/
typedef void * xTimerHandle;
/* Define the prototype to which timer callback functions must conform. */
typedef void (*tmrTIMER_CALLBACK)( xTimerHandle xTimer );
/**
* xTimerHandle xTimerCreate( const signed char *pcTimerName,
* portTickType xTimerPeriodInTicks,
* unsigned portBASE_TYPE uxAutoReload,
* void * pvTimerID,
* tmrTIMER_CALLBACK pxCallbackFunction );
*
* Creates a new software timer instance. This allocates the storage required
* by the new timer, initialises the new timers internal state, and returns a
* handle by which the new timer can be referenced.
*
* Timers are created in the dormant state. The xTimerStart(), xTimerReset(),
* xTimerStartFromISR(), xTimerResetFromISR(), xTimerChangePeriod() and
* xTimerChangePeriodFromISR() API functions can all be used to transition a timer into the
* active state.
*
* @param pcTimerName A text name that is assigned to the timer. This is done
* purely to assist debugging. The kernel itself only ever references a timer by
* its handle, and never by its name.
*
* @param xTimerPeriodInTicks The timer period. The time is defined in tick periods so
* the constant portTICK_RATE_MS can be used to convert a time that has been
* specified in milliseconds. For example, if the timer must expire after 100
* ticks, then xTimerPeriodInTicks should be set to 100. Alternatively, if the timer
* must expire after 500ms, then xPeriod can be set to ( 500 / portTICK_RATE_MS )
* provided configTICK_RATE_HZ is less than or equal to 1000.
*
* @param uxAutoReload If uxAutoReload is set to pdTRUE then the timer will
* expire repeatedly with a frequency set by the xTimerPeriodInTicks parameter. If
* uxAutoReload is set to pdFALSE then the timer will be a one-shot timer and
* enter the dormant state after it expires.
*
* @param pvTimerID An identifier that is assigned to the timer being created.
* Typically this would be used in the timer callback function to identify which
* timer expired when the same callback function is assigned to more than one
* timer.
*
* @param pxCallbackFunction The function to call when the timer expires.
* Callback functions must have the prototype defined by tmrTIMER_CALLBACK,
* which is "void vCallbackFunction( xTimerHandle xTimer );".
*
* @return If the timer is successfully create then a handle to the newly
* created timer is returned. If the timer cannot be created (because either
* there is insufficient FreeRTOS heap remaining to allocate the timer
* structures, or the timer period was set to 0) then 0 is returned.
*
* Example usage:
*
* #define NUM_TIMERS 5
*
* // An array to hold handles to the created timers.
* xTimerHandle xTimers[ NUM_TIMERS ];
*
* // An array to hold a count of the number of times each timer expires.
* long lExpireCounters[ NUM_TIMERS ] = { 0 };
*
* // Define a callback function that will be used by multiple timer instances.
* // The callback function does nothing but count the number of times the
* // associated timer expires, and stop the timer once the timer has expired
* // 10 times.
* void vTimerCallback( xTimerHandle pxTimer )
* {
* long lArrayIndex;
* const long xMaxExpiryCountBeforeStopping = 10;
*
* // Optionally do something if the pxTimer parameter is NULL.
* configASSERT( pxTimer );
*
* // Which timer expired?
* lArrayIndex = ( long ) pvTimerGetTimerID( pxTimer );
*
* // Increment the number of times that pxTimer has expired.
* lExpireCounters[ lArrayIndex ] += 1;
*
* // If the timer has expired 10 times then stop it from running.
* if( lExpireCounters[ lArrayIndex ] == xMaxExpiryCountBeforeStopping )
* {
* // Do not use a block time if calling a timer API function from a
* // timer callback function, as doing so could cause a deadlock!
* xTimerStop( pxTimer, 0 );
* }
* }
*
* void main( void )
* {
* long x;
*
* // Create then start some timers. Starting the timers before the scheduler
* // has been started means the timers will start running immediately that
* // the scheduler starts.
* for( x = 0; x < NUM_TIMERS; x++ )
* {
* xTimers[ x ] = xTimerCreate( "Timer", // Just a text name, not used by the kernel.
* ( 100 * x ), // The timer period in ticks.
* pdTRUE, // The timers will auto-reload themselves when they expire.
* ( void * ) x, // Assign each timer a unique id equal to its array index.
* vTimerCallback // Each timer calls the same callback when it expires.
* );
*
* if( xTimers[ x ] == NULL )
* {
* // The timer was not created.
* }
* else
* {
* // Start the timer. No block time is specified, and even if one was
* // it would be ignored because the scheduler has not yet been
* // started.
* if( xTimerStart( xTimers[ x ], 0 ) != pdPASS )
* {
* // The timer could not be set into the Active state.
* }
* }
* }
*
* // ...
* // Create tasks here.
* // ...
*
* // Starting the scheduler will start the timers running as they have already
* // been set into the active state.
* xTaskStartScheduler();
*
* // Should not reach here.
* for( ;; );
* }
*/
xTimerHandle xTimerCreate( const signed char *pcTimerName, portTickType xTimerPeriodInTicks, unsigned portBASE_TYPE uxAutoReload, void * pvTimerID, tmrTIMER_CALLBACK pxCallbackFunction ) PRIVILEGED_FUNCTION;
/**
* void *pvTimerGetTimerID( xTimerHandle xTimer );
*
* Returns the ID assigned to the timer.
*
* IDs are assigned to timers using the pvTimerID parameter of the call to
* xTimerCreated() that was used to create the timer.
*
* If the same callback function is assigned to multiple timers then the timer
* ID can be used within the callback function to identify which timer actually
* expired.
*
* @param xTimer The timer being queried.
*
* @return The ID assigned to the timer being queried.
*
* Example usage:
*
* See the xTimerCreate() API function example usage scenario.
*/
void *pvTimerGetTimerID( xTimerHandle xTimer ) PRIVILEGED_FUNCTION;
/**
* portBASE_TYPE xTimerIsTimerActive( xTimerHandle xTimer );
*
* Queries a timer to see if it is active or dormant.
*
* A timer will be dormant if:
* 1) It has been created but not started, or
* 2) It is an expired on-shot timer that has not been restarted.
*
* Timers are created in the dormant state. The xTimerStart(), xTimerReset(),
* xTimerStartFromISR(), xTimerResetFromISR(), xTimerChangePeriod() and
* xTimerChangePeriodFromISR() API functions can all be used to transition a timer into the
* active state.
*
* @param xTimer The timer being queried.
*
* @return pdFALSE will be returned if the timer is dormant. A value other than
* pdFALSE will be returned if the timer is active.
*
* Example usage:
*
* // This function assumes xTimer has already been created.
* void vAFunction( xTimerHandle xTimer )
* {
* if( xTimerIsTimerActive( xTimer ) != pdFALSE ) // or more simply and equivalently "if( xTimerIsTimerActive( xTimer ) )"
* {
* // xTimer is active, do something.
* }
* else
* {
* // xTimer is not active, do something else.
* }
* }
*/
portBASE_TYPE xTimerIsTimerActive( xTimerHandle xTimer ) PRIVILEGED_FUNCTION;
/**
* xTimerGetTimerDaemonTaskHandle() is only available if
* INCLUDE_xTimerGetTimerDaemonTaskHandle is set to 1 in FreeRTOSConfig.h.
*
* Simply returns the handle of the timer service/daemon task. It it not valid
* to call xTimerGetTimerDaemonTaskHandle() before the scheduler has been started.
*/
xTaskHandle xTimerGetTimerDaemonTaskHandle( void );
/**
* portBASE_TYPE xTimerStart( xTimerHandle xTimer, portTickType xBlockTime );
*
* Timer functionality is provided by a timer service/daemon task. Many of the
* public FreeRTOS timer API functions send commands to the timer service task
* though a queue called the timer command queue. The timer command queue is
* private to the kernel itself and is not directly accessible to application
* code. The length of the timer command queue is set by the
* configTIMER_QUEUE_LENGTH configuration constant.
*
* xTimerStart() starts a timer that was previously created using the
* xTimerCreate() API function. If the timer had already been started and was
* already in the active state, then xTimerStart() has equivalent functionality
* to the xTimerReset() API function.
*
* Starting a timer ensures the timer is in the active state. If the timer
* is not stopped, deleted, or reset in the mean time, the callback function
* associated with the timer will get called 'n' ticks after xTimerStart() was
* called, where 'n' is the timers defined period.
*
* It is valid to call xTimerStart() before the scheduler has been started, but
* when this is done the timer will not actually start until the scheduler is
* started, and the timers expiry time will be relative to when the scheduler is
* started, not relative to when xTimerStart() was called.
*
* The configUSE_TIMERS configuration constant must be set to 1 for xTimerStart()
* to be available.
*
* @param xTimer The handle of the timer being started/restarted.
*
* @param xBlockTime Specifies the time, in ticks, that the calling task should
* be held in the Blocked state to wait for the start command to be successfully
* sent to the timer command queue, should the queue already be full when
* xTimerStart() was called. xBlockTime is ignored if xTimerStart() is called
* before the scheduler is started.
*
* @return pdFAIL will be returned if the start command could not be sent to
* the timer command queue even after xBlockTime ticks had passed. pdPASS will
* be returned if the command was successfully sent to the timer command queue.
* When the command is actually processed will depend on the priority of the
* timer service/daemon task relative to other tasks in the system, although the
* timers expiry time is relative to when xTimerStart() is actually called. The
* timer service/daemon task priority is set by the configTIMER_TASK_PRIORITY
* configuration constant.
*
* Example usage:
*
* See the xTimerCreate() API function example usage scenario.
*
*/
#define xTimerStart( xTimer, xBlockTime ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_START, ( xTaskGetTickCount() ), NULL, ( xBlockTime ) )
/**
* portBASE_TYPE xTimerStop( xTimerHandle xTimer, portTickType xBlockTime );
*
* Timer functionality is provided by a timer service/daemon task. Many of the
* public FreeRTOS timer API functions send commands to the timer service task
* though a queue called the timer command queue. The timer command queue is
* private to the kernel itself and is not directly accessible to application
* code. The length of the timer command queue is set by the
* configTIMER_QUEUE_LENGTH configuration constant.
*
* xTimerStop() stops a timer that was previously started using either of the
* The xTimerStart(), xTimerReset(), xTimerStartFromISR(), xTimerResetFromISR(),
* xTimerChangePeriod() or xTimerChangePeriodFromISR() API functions.
*
* Stopping a timer ensures the timer is not in the active state.
*
* The configUSE_TIMERS configuration constant must be set to 1 for xTimerStop()
* to be available.
*
* @param xTimer The handle of the timer being stopped.
*
* @param xBlockTime Specifies the time, in ticks, that the calling task should
* be held in the Blocked state to wait for the stop command to be successfully
* sent to the timer command queue, should the queue already be full when
* xTimerStop() was called. xBlockTime is ignored if xTimerStop() is called
* before the scheduler is started.
*
* @return pdFAIL will be returned if the stop command could not be sent to
* the timer command queue even after xBlockTime ticks had passed. pdPASS will
* be returned if the command was successfully sent to the timer command queue.
* When the command is actually processed will depend on the priority of the
* timer service/daemon task relative to other tasks in the system. The timer
* service/daemon task priority is set by the configTIMER_TASK_PRIORITY
* configuration constant.
*
* Example usage:
*
* See the xTimerCreate() API function example usage scenario.
*
*/
#define xTimerStop( xTimer, xBlockTime ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_STOP, 0U, NULL, ( xBlockTime ) )
/**
* portBASE_TYPE xTimerChangePeriod( xTimerHandle xTimer,
* portTickType xNewPeriod,
* portTickType xBlockTime );
*
* Timer functionality is provided by a timer service/daemon task. Many of the
* public FreeRTOS timer API functions send commands to the timer service task
* though a queue called the timer command queue. The timer command queue is
* private to the kernel itself and is not directly accessible to application
* code. The length of the timer command queue is set by the
* configTIMER_QUEUE_LENGTH configuration constant.
*
* xTimerChangePeriod() changes the period of a timer that was previously
* created using the xTimerCreate() API function.
*
* xTimerChangePeriod() can be called to change the period of an active or
* dormant state timer.
*
* The configUSE_TIMERS configuration constant must be set to 1 for
* xTimerChangePeriod() to be available.
*
* @param xTimer The handle of the timer that is having its period changed.
*
* @param xNewPeriod The new period for xTimer. Timer periods are specified in
* tick periods, so the constant portTICK_RATE_MS can be used to convert a time
* that has been specified in milliseconds. For example, if the timer must
* expire after 100 ticks, then xNewPeriod should be set to 100. Alternatively,
* if the timer must expire after 500ms, then xNewPeriod can be set to
* ( 500 / portTICK_RATE_MS ) provided configTICK_RATE_HZ is less than
* or equal to 1000.
*
* @param xBlockTime Specifies the time, in ticks, that the calling task should
* be held in the Blocked state to wait for the change period command to be
* successfully sent to the timer command queue, should the queue already be
* full when xTimerChangePeriod() was called. xBlockTime is ignored if
* xTimerChangePeriod() is called before the scheduler is started.
*
* @return pdFAIL will be returned if the change period command could not be
* sent to the timer command queue even after xBlockTime ticks had passed.
* pdPASS will be returned if the command was successfully sent to the timer
* command queue. When the command is actually processed will depend on the
* priority of the timer service/daemon task relative to other tasks in the
* system. The timer service/daemon task priority is set by the
* configTIMER_TASK_PRIORITY configuration constant.
*
* Example usage:
*
* // This function assumes xTimer has already been created. If the timer
* // referenced by xTimer is already active when it is called, then the timer
* // is deleted. If the timer referenced by xTimer is not active when it is
* // called, then the period of the timer is set to 500ms and the timer is
* // started.
* void vAFunction( xTimerHandle xTimer )
* {
* if( xTimerIsTimerActive( xTimer ) != pdFALSE ) // or more simply and equivalently "if( xTimerIsTimerActive( xTimer ) )"
* {
* // xTimer is already active - delete it.
* xTimerDelete( xTimer );
* }
* else
* {
* // xTimer is not active, change its period to 500ms. This will also
* // cause the timer to start. Block for a maximum of 100 ticks if the
* // change period command cannot immediately be sent to the timer
* // command queue.
* if( xTimerChangePeriod( xTimer, 500 / portTICK_RATE_MS, 100 ) == pdPASS )
* {
* // The command was successfully sent.
* }
* else
* {
* // The command could not be sent, even after waiting for 100 ticks
* // to pass. Take appropriate action here.
* }
* }
* }
*/
#define xTimerChangePeriod( xTimer, xNewPeriod, xBlockTime ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_CHANGE_PERIOD, ( xNewPeriod ), NULL, ( xBlockTime ) )
/**
* portBASE_TYPE xTimerDelete( xTimerHandle xTimer, portTickType xBlockTime );
*
* Timer functionality is provided by a timer service/daemon task. Many of the
* public FreeRTOS timer API functions send commands to the timer service task
* though a queue called the timer command queue. The timer command queue is
* private to the kernel itself and is not directly accessible to application
* code. The length of the timer command queue is set by the
* configTIMER_QUEUE_LENGTH configuration constant.
*
* xTimerDelete() deletes a timer that was previously created using the
* xTimerCreate() API function.
*
* The configUSE_TIMERS configuration constant must be set to 1 for
* xTimerDelete() to be available.
*
* @param xTimer The handle of the timer being deleted.
*
* @param xBlockTime Specifies the time, in ticks, that the calling task should
* be held in the Blocked state to wait for the delete command to be
* successfully sent to the timer command queue, should the queue already be
* full when xTimerDelete() was called. xBlockTime is ignored if xTimerDelete()
* is called before the scheduler is started.
*
* @return pdFAIL will be returned if the delete command could not be sent to
* the timer command queue even after xBlockTime ticks had passed. pdPASS will
* be returned if the command was successfully sent to the timer command queue.
* When the command is actually processed will depend on the priority of the
* timer service/daemon task relative to other tasks in the system. The timer
* service/daemon task priority is set by the configTIMER_TASK_PRIORITY
* configuration constant.
*
* Example usage:
*
* See the xTimerChangePeriod() API function example usage scenario.
*/
#define xTimerDelete( xTimer, xBlockTime ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_DELETE, 0U, NULL, ( xBlockTime ) )
/**
* portBASE_TYPE xTimerReset( xTimerHandle xTimer, portTickType xBlockTime );
*
* Timer functionality is provided by a timer service/daemon task. Many of the
* public FreeRTOS timer API functions send commands to the timer service task
* though a queue called the timer command queue. The timer command queue is
* private to the kernel itself and is not directly accessible to application
* code. The length of the timer command queue is set by the
* configTIMER_QUEUE_LENGTH configuration constant.
*
* xTimerReset() re-starts a timer that was previously created using the
* xTimerCreate() API function. If the timer had already been started and was
* already in the active state, then xTimerReset() will cause the timer to
* re-evaluate its expiry time so that it is relative to when xTimerReset() was
* called. If the timer was in the dormant state then xTimerReset() has
* equivalent functionality to the xTimerStart() API function.
*
* Resetting a timer ensures the timer is in the active state. If the timer
* is not stopped, deleted, or reset in the mean time, the callback function
* associated with the timer will get called 'n' ticks after xTimerReset() was
* called, where 'n' is the timers defined period.
*
* It is valid to call xTimerReset() before the scheduler has been started, but
* when this is done the timer will not actually start until the scheduler is
* started, and the timers expiry time will be relative to when the scheduler is
* started, not relative to when xTimerReset() was called.
*
* The configUSE_TIMERS configuration constant must be set to 1 for xTimerReset()
* to be available.
*
* @param xTimer The handle of the timer being reset/started/restarted.
*
* @param xBlockTime Specifies the time, in ticks, that the calling task should
* be held in the Blocked state to wait for the reset command to be successfully
* sent to the timer command queue, should the queue already be full when
* xTimerReset() was called. xBlockTime is ignored if xTimerReset() is called
* before the scheduler is started.
*
* @return pdFAIL will be returned if the reset command could not be sent to
* the timer command queue even after xBlockTime ticks had passed. pdPASS will
* be returned if the command was successfully sent to the timer command queue.
* When the command is actually processed will depend on the priority of the
* timer service/daemon task relative to other tasks in the system, although the
* timers expiry time is relative to when xTimerStart() is actually called. The
* timer service/daemon task priority is set by the configTIMER_TASK_PRIORITY
* configuration constant.
*
* Example usage:
*
* // When a key is pressed, an LCD back-light is switched on. If 5 seconds pass
* // without a key being pressed, then the LCD back-light is switched off. In
* // this case, the timer is a one-shot timer.
*
* xTimerHandle xBacklightTimer = NULL;
*
* // The callback function assigned to the one-shot timer. In this case the
* // parameter is not used.
* void vBacklightTimerCallback( xTimerHandle pxTimer )
* {
* // The timer expired, therefore 5 seconds must have passed since a key
* // was pressed. Switch off the LCD back-light.
* vSetBacklightState( BACKLIGHT_OFF );
* }
*
* // The key press event handler.
* void vKeyPressEventHandler( char cKey )
* {
* // Ensure the LCD back-light is on, then reset the timer that is
* // responsible for turning the back-light off after 5 seconds of
* // key inactivity. Wait 10 ticks for the command to be successfully sent
* // if it cannot be sent immediately.
* vSetBacklightState( BACKLIGHT_ON );
* if( xTimerReset( xBacklightTimer, 100 ) != pdPASS )
* {
* // The reset command was not executed successfully. Take appropriate
* // action here.
* }
*
* // Perform the rest of the key processing here.
* }
*
* void main( void )
* {
* long x;
*
* // Create then start the one-shot timer that is responsible for turning
* // the back-light off if no keys are pressed within a 5 second period.
* xBacklightTimer = xTimerCreate( "BacklightTimer", // Just a text name, not used by the kernel.
* ( 5000 / portTICK_RATE_MS), // The timer period in ticks.
* pdFALSE, // The timer is a one-shot timer.
* 0, // The id is not used by the callback so can take any value.
* vBacklightTimerCallback // The callback function that switches the LCD back-light off.
* );
*
* if( xBacklightTimer == NULL )
* {
* // The timer was not created.
* }
* else
* {
* // Start the timer. No block time is specified, and even if one was
* // it would be ignored because the scheduler has not yet been
* // started.
* if( xTimerStart( xBacklightTimer, 0 ) != pdPASS )
* {
* // The timer could not be set into the Active state.
* }
* }
*
* // ...
* // Create tasks here.
* // ...
*
* // Starting the scheduler will start the timer running as it has already
* // been set into the active state.
* xTaskStartScheduler();
*
* // Should not reach here.
* for( ;; );
* }
*/
#define xTimerReset( xTimer, xBlockTime ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_START, ( xTaskGetTickCount() ), NULL, ( xBlockTime ) )
/**
* portBASE_TYPE xTimerStartFromISR( xTimerHandle xTimer,
* portBASE_TYPE *pxHigherPriorityTaskWoken );
*
* A version of xTimerStart() that can be called from an interrupt service
* routine.
*
* @param xTimer The handle of the timer being started/restarted.
*
* @param pxHigherPriorityTaskWoken The timer service/daemon task spends most
* of its time in the Blocked state, waiting for messages to arrive on the timer
* command queue. Calling xTimerStartFromISR() writes a message to the timer
* command queue, so has the potential to transition the timer service/daemon
* task out of the Blocked state. If calling xTimerStartFromISR() causes the
* timer service/daemon task to leave the Blocked state, and the timer service/
* daemon task has a priority equal to or greater than the currently executing
* task (the task that was interrupted), then *pxHigherPriorityTaskWoken will
* get set to pdTRUE internally within the xTimerStartFromISR() function. If
* xTimerStartFromISR() sets this value to pdTRUE then a context switch should
* be performed before the interrupt exits.
*
* @return pdFAIL will be returned if the start command could not be sent to
* the timer command queue. pdPASS will be returned if the command was
* successfully sent to the timer command queue. When the command is actually
* processed will depend on the priority of the timer service/daemon task
* relative to other tasks in the system, although the timers expiry time is
* relative to when xTimerStartFromISR() is actually called. The timer service/daemon
* task priority is set by the configTIMER_TASK_PRIORITY configuration constant.
*
* Example usage:
*
* // This scenario assumes xBacklightTimer has already been created. When a
* // key is pressed, an LCD back-light is switched on. If 5 seconds pass
* // without a key being pressed, then the LCD back-light is switched off. In
* // this case, the timer is a one-shot timer, and unlike the example given for
* // the xTimerReset() function, the key press event handler is an interrupt
* // service routine.
*
* // The callback function assigned to the one-shot timer. In this case the
* // parameter is not used.
* void vBacklightTimerCallback( xTimerHandle pxTimer )
* {
* // The timer expired, therefore 5 seconds must have passed since a key
* // was pressed. Switch off the LCD back-light.
* vSetBacklightState( BACKLIGHT_OFF );
* }
*
* // The key press interrupt service routine.
* void vKeyPressEventInterruptHandler( void )
* {
* portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;
*
* // Ensure the LCD back-light is on, then restart the timer that is
* // responsible for turning the back-light off after 5 seconds of
* // key inactivity. This is an interrupt service routine so can only
* // call FreeRTOS API functions that end in "FromISR".
* vSetBacklightState( BACKLIGHT_ON );
*
* // xTimerStartFromISR() or xTimerResetFromISR() could be called here
* // as both cause the timer to re-calculate its expiry time.
* // xHigherPriorityTaskWoken was initialised to pdFALSE when it was
* // declared (in this function).
* if( xTimerStartFromISR( xBacklightTimer, &xHigherPriorityTaskWoken ) != pdPASS )
* {
* // The start command was not executed successfully. Take appropriate
* // action here.
* }
*
* // Perform the rest of the key processing here.
*
* // If xHigherPriorityTaskWoken equals pdTRUE, then a context switch
* // should be performed. The syntax required to perform a context switch
* // from inside an ISR varies from port to port, and from compiler to
* // compiler. Inspect the demos for the port you are using to find the
* // actual syntax required.
* if( xHigherPriorityTaskWoken != pdFALSE )
* {
* // Call the interrupt safe yield function here (actual function
* // depends on the FreeRTOS port being used.
* }
* }
*/
#define xTimerStartFromISR( xTimer, pxHigherPriorityTaskWoken ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_START, ( xTaskGetTickCountFromISR() ), ( pxHigherPriorityTaskWoken ), 0U )
/**
* portBASE_TYPE xTimerStopFromISR( xTimerHandle xTimer,
* portBASE_TYPE *pxHigherPriorityTaskWoken );
*
* A version of xTimerStop() that can be called from an interrupt service
* routine.
*
* @param xTimer The handle of the timer being stopped.
*
* @param pxHigherPriorityTaskWoken The timer service/daemon task spends most
* of its time in the Blocked state, waiting for messages to arrive on the timer
* command queue. Calling xTimerStopFromISR() writes a message to the timer
* command queue, so has the potential to transition the timer service/daemon
* task out of the Blocked state. If calling xTimerStopFromISR() causes the
* timer service/daemon task to leave the Blocked state, and the timer service/
* daemon task has a priority equal to or greater than the currently executing
* task (the task that was interrupted), then *pxHigherPriorityTaskWoken will
* get set to pdTRUE internally within the xTimerStopFromISR() function. If
* xTimerStopFromISR() sets this value to pdTRUE then a context switch should
* be performed before the interrupt exits.
*
* @return pdFAIL will be returned if the stop command could not be sent to
* the timer command queue. pdPASS will be returned if the command was
* successfully sent to the timer command queue. When the command is actually
* processed will depend on the priority of the timer service/daemon task
* relative to other tasks in the system. The timer service/daemon task
* priority is set by the configTIMER_TASK_PRIORITY configuration constant.
*
* Example usage:
*
* // This scenario assumes xTimer has already been created and started. When
* // an interrupt occurs, the timer should be simply stopped.
*
* // The interrupt service routine that stops the timer.
* void vAnExampleInterruptServiceRoutine( void )
* {
* portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;
*
* // The interrupt has occurred - simply stop the timer.
* // xHigherPriorityTaskWoken was set to pdFALSE where it was defined
* // (within this function). As this is an interrupt service routine, only
* // FreeRTOS API functions that end in "FromISR" can be used.
* if( xTimerStopFromISR( xTimer, &xHigherPriorityTaskWoken ) != pdPASS )
* {
* // The stop command was not executed successfully. Take appropriate
* // action here.
* }
*
* // If xHigherPriorityTaskWoken equals pdTRUE, then a context switch
* // should be performed. The syntax required to perform a context switch
* // from inside an ISR varies from port to port, and from compiler to
* // compiler. Inspect the demos for the port you are using to find the
* // actual syntax required.
* if( xHigherPriorityTaskWoken != pdFALSE )
* {
* // Call the interrupt safe yield function here (actual function
* // depends on the FreeRTOS port being used.
* }
* }
*/
#define xTimerStopFromISR( xTimer, pxHigherPriorityTaskWoken ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_STOP, 0, ( pxHigherPriorityTaskWoken ), 0U )
/**
* portBASE_TYPE xTimerChangePeriodFromISR( xTimerHandle xTimer,
* portTickType xNewPeriod,
* portBASE_TYPE *pxHigherPriorityTaskWoken );
*
* A version of xTimerChangePeriod() that can be called from an interrupt
* service routine.
*
* @param xTimer The handle of the timer that is having its period changed.
*
* @param xNewPeriod The new period for xTimer. Timer periods are specified in
* tick periods, so the constant portTICK_RATE_MS can be used to convert a time
* that has been specified in milliseconds. For example, if the timer must
* expire after 100 ticks, then xNewPeriod should be set to 100. Alternatively,
* if the timer must expire after 500ms, then xNewPeriod can be set to
* ( 500 / portTICK_RATE_MS ) provided configTICK_RATE_HZ is less than
* or equal to 1000.
*
* @param pxHigherPriorityTaskWoken The timer service/daemon task spends most
* of its time in the Blocked state, waiting for messages to arrive on the timer
* command queue. Calling xTimerChangePeriodFromISR() writes a message to the
* timer command queue, so has the potential to transition the timer service/
* daemon task out of the Blocked state. If calling xTimerChangePeriodFromISR()
* causes the timer service/daemon task to leave the Blocked state, and the
* timer service/daemon task has a priority equal to or greater than the
* currently executing task (the task that was interrupted), then
* *pxHigherPriorityTaskWoken will get set to pdTRUE internally within the
* xTimerChangePeriodFromISR() function. If xTimerChangePeriodFromISR() sets
* this value to pdTRUE then a context switch should be performed before the
* interrupt exits.
*
* @return pdFAIL will be returned if the command to change the timers period
* could not be sent to the timer command queue. pdPASS will be returned if the
* command was successfully sent to the timer command queue. When the command
* is actually processed will depend on the priority of the timer service/daemon
* task relative to other tasks in the system. The timer service/daemon task
* priority is set by the configTIMER_TASK_PRIORITY configuration constant.
*
* Example usage:
*
* // This scenario assumes xTimer has already been created and started. When
* // an interrupt occurs, the period of xTimer should be changed to 500ms.
*
* // The interrupt service routine that changes the period of xTimer.
* void vAnExampleInterruptServiceRoutine( void )
* {
* portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;
*
* // The interrupt has occurred - change the period of xTimer to 500ms.
* // xHigherPriorityTaskWoken was set to pdFALSE where it was defined
* // (within this function). As this is an interrupt service routine, only
* // FreeRTOS API functions that end in "FromISR" can be used.
* if( xTimerChangePeriodFromISR( xTimer, &xHigherPriorityTaskWoken ) != pdPASS )
* {
* // The command to change the timers period was not executed
* // successfully. Take appropriate action here.
* }
*
* // If xHigherPriorityTaskWoken equals pdTRUE, then a context switch
* // should be performed. The syntax required to perform a context switch
* // from inside an ISR varies from port to port, and from compiler to
* // compiler. Inspect the demos for the port you are using to find the
* // actual syntax required.
* if( xHigherPriorityTaskWoken != pdFALSE )
* {
* // Call the interrupt safe yield function here (actual function
* // depends on the FreeRTOS port being used.
* }
* }
*/
#define xTimerChangePeriodFromISR( xTimer, xNewPeriod, pxHigherPriorityTaskWoken ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_CHANGE_PERIOD, ( xNewPeriod ), ( pxHigherPriorityTaskWoken ), 0U )
/**
* portBASE_TYPE xTimerResetFromISR( xTimerHandle xTimer,
* portBASE_TYPE *pxHigherPriorityTaskWoken );
*
* A version of xTimerReset() that can be called from an interrupt service
* routine.
*
* @param xTimer The handle of the timer that is to be started, reset, or
* restarted.
*
* @param pxHigherPriorityTaskWoken The timer service/daemon task spends most
* of its time in the Blocked state, waiting for messages to arrive on the timer
* command queue. Calling xTimerResetFromISR() writes a message to the timer
* command queue, so has the potential to transition the timer service/daemon
* task out of the Blocked state. If calling xTimerResetFromISR() causes the
* timer service/daemon task to leave the Blocked state, and the timer service/
* daemon task has a priority equal to or greater than the currently executing
* task (the task that was interrupted), then *pxHigherPriorityTaskWoken will
* get set to pdTRUE internally within the xTimerResetFromISR() function. If
* xTimerResetFromISR() sets this value to pdTRUE then a context switch should
* be performed before the interrupt exits.
*
* @return pdFAIL will be returned if the reset command could not be sent to
* the timer command queue. pdPASS will be returned if the command was
* successfully sent to the timer command queue. When the command is actually
* processed will depend on the priority of the timer service/daemon task
* relative to other tasks in the system, although the timers expiry time is
* relative to when xTimerResetFromISR() is actually called. The timer service/daemon
* task priority is set by the configTIMER_TASK_PRIORITY configuration constant.
*
* Example usage:
*
* // This scenario assumes xBacklightTimer has already been created. When a
* // key is pressed, an LCD back-light is switched on. If 5 seconds pass
* // without a key being pressed, then the LCD back-light is switched off. In
* // this case, the timer is a one-shot timer, and unlike the example given for
* // the xTimerReset() function, the key press event handler is an interrupt
* // service routine.
*
* // The callback function assigned to the one-shot timer. In this case the
* // parameter is not used.
* void vBacklightTimerCallback( xTimerHandle pxTimer )
* {
* // The timer expired, therefore 5 seconds must have passed since a key
* // was pressed. Switch off the LCD back-light.
* vSetBacklightState( BACKLIGHT_OFF );
* }
*
* // The key press interrupt service routine.
* void vKeyPressEventInterruptHandler( void )
* {
* portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;
*
* // Ensure the LCD back-light is on, then reset the timer that is
* // responsible for turning the back-light off after 5 seconds of
* // key inactivity. This is an interrupt service routine so can only
* // call FreeRTOS API functions that end in "FromISR".
* vSetBacklightState( BACKLIGHT_ON );
*
* // xTimerStartFromISR() or xTimerResetFromISR() could be called here
* // as both cause the timer to re-calculate its expiry time.
* // xHigherPriorityTaskWoken was initialised to pdFALSE when it was
* // declared (in this function).
* if( xTimerResetFromISR( xBacklightTimer, &xHigherPriorityTaskWoken ) != pdPASS )
* {
* // The reset command was not executed successfully. Take appropriate
* // action here.
* }
*
* // Perform the rest of the key processing here.
*
* // If xHigherPriorityTaskWoken equals pdTRUE, then a context switch
* // should be performed. The syntax required to perform a context switch
* // from inside an ISR varies from port to port, and from compiler to
* // compiler. Inspect the demos for the port you are using to find the
* // actual syntax required.
* if( xHigherPriorityTaskWoken != pdFALSE )
* {
* // Call the interrupt safe yield function here (actual function
* // depends on the FreeRTOS port being used.
* }
* }
*/
#define xTimerResetFromISR( xTimer, pxHigherPriorityTaskWoken ) xTimerGenericCommand( ( xTimer ), tmrCOMMAND_START, ( xTaskGetTickCountFromISR() ), ( pxHigherPriorityTaskWoken ), 0U )
/*
* Functions beyond this part are not part of the public API and are intended
* for use by the kernel only.
*/
portBASE_TYPE xTimerCreateTimerTask( void ) PRIVILEGED_FUNCTION;
portBASE_TYPE xTimerGenericCommand( xTimerHandle xTimer, portBASE_TYPE xCommandID, portTickType xOptionalValue, signed portBASE_TYPE *pxHigherPriorityTaskWoken, portTickType xBlockTime ) PRIVILEGED_FUNCTION;
#ifdef __cplusplus
}
#endif
#endif /* TIMERS_H */

204
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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
#include <stdlib.h>
#include "FreeRTOS.h"
#include "list.h"
/*-----------------------------------------------------------
* PUBLIC LIST API documented in list.h
*----------------------------------------------------------*/
void vListInitialise( xList *pxList )
{
/* The list structure contains a list item which is used to mark the
end of the list. To initialise the list the list end is inserted
as the only list entry. */
pxList->pxIndex = ( xListItem * ) &( pxList->xListEnd );
/* The list end value is the highest possible value in the list to
ensure it remains at the end of the list. */
pxList->xListEnd.xItemValue = portMAX_DELAY;
/* The list end next and previous pointers point to itself so we know
when the list is empty. */
pxList->xListEnd.pxNext = ( xListItem * ) &( pxList->xListEnd );
pxList->xListEnd.pxPrevious = ( xListItem * ) &( pxList->xListEnd );
pxList->uxNumberOfItems = ( unsigned portBASE_TYPE ) 0U;
}
/*-----------------------------------------------------------*/
void vListInitialiseItem( xListItem *pxItem )
{
/* Make sure the list item is not recorded as being on a list. */
pxItem->pvContainer = NULL;
}
/*-----------------------------------------------------------*/
void vListInsertEnd( xList *pxList, xListItem *pxNewListItem )
{
volatile xListItem * pxIndex;
/* Insert a new list item into pxList, but rather than sort the list,
makes the new list item the last item to be removed by a call to
pvListGetOwnerOfNextEntry. This means it has to be the item pointed to by
the pxIndex member. */
pxIndex = pxList->pxIndex;
pxNewListItem->pxNext = pxIndex->pxNext;
pxNewListItem->pxPrevious = pxList->pxIndex;
pxIndex->pxNext->pxPrevious = ( volatile xListItem * ) pxNewListItem;
pxIndex->pxNext = ( volatile xListItem * ) pxNewListItem;
pxList->pxIndex = ( volatile xListItem * ) pxNewListItem;
/* Remember which list the item is in. */
pxNewListItem->pvContainer = ( void * ) pxList;
( pxList->uxNumberOfItems )++;
}
/*-----------------------------------------------------------*/
void vListInsert( xList *pxList, xListItem *pxNewListItem )
{
volatile xListItem *pxIterator;
portTickType xValueOfInsertion;
/* Insert the new list item into the list, sorted in ulListItem order. */
xValueOfInsertion = pxNewListItem->xItemValue;
/* If the list already contains a list item with the same item value then
the new list item should be placed after it. This ensures that TCB's which
are stored in ready lists (all of which have the same ulListItem value)
get an equal share of the CPU. However, if the xItemValue is the same as
the back marker the iteration loop below will not end. This means we need
to guard against this by checking the value first and modifying the
algorithm slightly if necessary. */
if( xValueOfInsertion == portMAX_DELAY )
{
pxIterator = pxList->xListEnd.pxPrevious;
}
else
{
/* *** NOTE ***********************************************************
If you find your application is crashing here then likely causes are:
1) Stack overflow -
see http://www.freertos.org/Stacks-and-stack-overflow-checking.html
2) Incorrect interrupt priority assignment, especially on Cortex-M3
parts where numerically high priority values denote low actual
interrupt priories, which can seem counter intuitive. See
configMAX_SYSCALL_INTERRUPT_PRIORITY on http://www.freertos.org/a00110.html
3) Calling an API function from within a critical section or when
the scheduler is suspended.
4) Using a queue or semaphore before it has been initialised or
before the scheduler has been started (are interrupts firing
before vTaskStartScheduler() has been called?).
See http://www.freertos.org/FAQHelp.html for more tips.
**********************************************************************/
for( pxIterator = ( xListItem * ) &( pxList->xListEnd ); pxIterator->pxNext->xItemValue <= xValueOfInsertion; pxIterator = pxIterator->pxNext )
{
/* There is nothing to do here, we are just iterating to the
wanted insertion position. */
}
}
pxNewListItem->pxNext = pxIterator->pxNext;
pxNewListItem->pxNext->pxPrevious = ( volatile xListItem * ) pxNewListItem;
pxNewListItem->pxPrevious = pxIterator;
pxIterator->pxNext = ( volatile xListItem * ) pxNewListItem;
/* Remember which list the item is in. This allows fast removal of the
item later. */
pxNewListItem->pvContainer = ( void * ) pxList;
( pxList->uxNumberOfItems )++;
}
/*-----------------------------------------------------------*/
void vListRemove( xListItem *pxItemToRemove )
{
xList * pxList;
pxItemToRemove->pxNext->pxPrevious = pxItemToRemove->pxPrevious;
pxItemToRemove->pxPrevious->pxNext = pxItemToRemove->pxNext;
/* The list item knows which list it is in. Obtain the list from the list
item. */
pxList = ( xList * ) pxItemToRemove->pvContainer;
/* Make sure the index is left pointing to a valid item. */
if( pxList->pxIndex == pxItemToRemove )
{
pxList->pxIndex = pxItemToRemove->pxPrevious;
}
pxItemToRemove->pvContainer = NULL;
( pxList->uxNumberOfItems )--;
}
/*-----------------------------------------------------------*/

300
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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
/*-----------------------------------------------------------
* Implementation of functions defined in portable.h for the ARM CM3 port.
*----------------------------------------------------------*/
/* Scheduler includes. */
#include "FreeRTOS.h"
#include "task.h"
/* For backward compatibility, ensure configKERNEL_INTERRUPT_PRIORITY is
defined. The value should also ensure backward compatibility.
FreeRTOS.org versions prior to V4.4.0 did not include this definition. */
#ifndef configKERNEL_INTERRUPT_PRIORITY
#define configKERNEL_INTERRUPT_PRIORITY 255
#endif
#if configMAX_SYSCALL_INTERRUPT_PRIORITY == 0
#error configMAX_SYSCALL_INTERRUPT_PRIORITY must not be set to 0. See http://www.FreeRTOS.org/RTOS-Cortex-M3-M4.html
#endif
/* Constants required to manipulate the NVIC. */
#define portNVIC_SYSTICK_CTRL ( ( volatile unsigned long *) 0xe000e010 )
#define portNVIC_SYSTICK_LOAD ( ( volatile unsigned long *) 0xe000e014 )
#define portNVIC_INT_CTRL ( ( volatile unsigned long *) 0xe000ed04 )
#define portNVIC_SYSPRI2 ( ( volatile unsigned long *) 0xe000ed20 )
#define portNVIC_SYSTICK_CLK 0x00000004
#define portNVIC_SYSTICK_INT 0x00000002
#define portNVIC_SYSTICK_ENABLE 0x00000001
#define portNVIC_PENDSVSET 0x10000000
#define portNVIC_PENDSV_PRI ( ( ( unsigned long ) configKERNEL_INTERRUPT_PRIORITY ) << 16 )
#define portNVIC_SYSTICK_PRI ( ( ( unsigned long ) configKERNEL_INTERRUPT_PRIORITY ) << 24 )
/* Constants required to set up the initial stack. */
#define portINITIAL_XPSR ( 0x01000000 )
/* The priority used by the kernel is assigned to a variable to make access
from inline assembler easier. */
const unsigned long ulKernelPriority = configKERNEL_INTERRUPT_PRIORITY;
/* Each task maintains its own interrupt status in the critical nesting
variable. */
static unsigned portBASE_TYPE uxCriticalNesting = 0xaaaaaaaa;
/*
* Setup the timer to generate the tick interrupts.
*/
static void prvSetupTimerInterrupt( void );
/*
* Exception handlers.
*/
void xPortPendSVHandler( void ) __attribute__ (( naked ));
void xPortSysTickHandler( void );
void vPortSVCHandler( void ) __attribute__ (( naked ));
/*
* Start first task is a separate function so it can be tested in isolation.
*/
static void prvPortStartFirstTask( void ) __attribute__ (( naked ));
/*-----------------------------------------------------------*/
/*
* See header file for description.
*/
portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters )
{
/* Simulate the stack frame as it would be created by a context switch
interrupt. */
pxTopOfStack--; /* Offset added to account for the way the MCU uses the stack on entry/exit of interrupts. */
*pxTopOfStack = portINITIAL_XPSR; /* xPSR */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) pxCode; /* PC */
pxTopOfStack--;
*pxTopOfStack = 0; /* LR */
pxTopOfStack -= 5; /* R12, R3, R2 and R1. */
*pxTopOfStack = ( portSTACK_TYPE ) pvParameters; /* R0 */
pxTopOfStack -= 8; /* R11, R10, R9, R8, R7, R6, R5 and R4. */
return pxTopOfStack;
}
/*-----------------------------------------------------------*/
void vPortSVCHandler( void )
{
__asm volatile (
" ldr r3, pxCurrentTCBConst2 \n" /* Restore the context. */
" ldr r1, [r3] \n" /* Use pxCurrentTCBConst to get the pxCurrentTCB address. */
" ldr r0, [r1] \n" /* The first item in pxCurrentTCB is the task top of stack. */
" ldmia r0!, {r4-r11} \n" /* Pop the registers that are not automatically saved on exception entry and the critical nesting count. */
" msr psp, r0 \n" /* Restore the task stack pointer. */
" mov r0, #0 \n"
" msr basepri, r0 \n"
" orr r14, #0xd \n"
" bx r14 \n"
" \n"
" .align 2 \n"
"pxCurrentTCBConst2: .word pxCurrentTCB \n"
);
}
/*-----------------------------------------------------------*/
static void prvPortStartFirstTask( void )
{
__asm volatile(
" ldr r0, =0xE000ED08 \n" /* Use the NVIC offset register to locate the stack. */
" ldr r0, [r0] \n"
" ldr r0, [r0] \n"
" msr msp, r0 \n" /* Set the msp back to the start of the stack. */
" cpsie i \n" /* Globally enable interrupts. */
" svc 0 \n" /* System call to start first task. */
" nop \n"
);
}
/*-----------------------------------------------------------*/
/*
* See header file for description.
*/
portBASE_TYPE xPortStartScheduler( void )
{
/* Make PendSV, CallSV and SysTick the same priroity as the kernel. */
*(portNVIC_SYSPRI2) |= portNVIC_PENDSV_PRI;
*(portNVIC_SYSPRI2) |= portNVIC_SYSTICK_PRI;
/* Start the timer that generates the tick ISR. Interrupts are disabled
here already. */
prvSetupTimerInterrupt();
/* Initialise the critical nesting count ready for the first task. */
uxCriticalNesting = 0;
/* Start the first task. */
prvPortStartFirstTask();
/* Should not get here! */
return 0;
}
/*-----------------------------------------------------------*/
void vPortEndScheduler( void )
{
/* It is unlikely that the CM3 port will require this function as there
is nothing to return to. */
}
/*-----------------------------------------------------------*/
void vPortYieldFromISR( void )
{
/* Set a PendSV to request a context switch. */
*(portNVIC_INT_CTRL) = portNVIC_PENDSVSET;
}
/*-----------------------------------------------------------*/
void vPortEnterCritical( void )
{
portDISABLE_INTERRUPTS();
uxCriticalNesting++;
}
/*-----------------------------------------------------------*/
void vPortExitCritical( void )
{
uxCriticalNesting--;
if( uxCriticalNesting == 0 )
{
portENABLE_INTERRUPTS();
}
}
/*-----------------------------------------------------------*/
void xPortPendSVHandler( void )
{
/* This is a naked function. */
__asm volatile
(
" mrs r0, psp \n"
" \n"
" ldr r3, pxCurrentTCBConst \n" /* Get the location of the current TCB. */
" ldr r2, [r3] \n"
" \n"
" stmdb r0!, {r4-r11} \n" /* Save the remaining registers. */
" str r0, [r2] \n" /* Save the new top of stack into the first member of the TCB. */
" \n"
" stmdb sp!, {r3, r14} \n"
" mov r0, %0 \n"
" msr basepri, r0 \n"
" bl vTaskSwitchContext \n"
" mov r0, #0 \n"
" msr basepri, r0 \n"
" ldmia sp!, {r3, r14} \n"
" \n" /* Restore the context, including the critical nesting count. */
" ldr r1, [r3] \n"
" ldr r0, [r1] \n" /* The first item in pxCurrentTCB is the task top of stack. */
" ldmia r0!, {r4-r11} \n" /* Pop the registers. */
" msr psp, r0 \n"
" bx r14 \n"
" \n"
" .align 2 \n"
"pxCurrentTCBConst: .word pxCurrentTCB \n"
::"i"(configMAX_SYSCALL_INTERRUPT_PRIORITY)
);
}
/*-----------------------------------------------------------*/
void xPortSysTickHandler( void )
{
unsigned long ulDummy;
/* If using preemption, also force a context switch. */
#if configUSE_PREEMPTION == 1
*(portNVIC_INT_CTRL) = portNVIC_PENDSVSET;
#endif
ulDummy = portSET_INTERRUPT_MASK_FROM_ISR();
{
vTaskIncrementTick();
}
portCLEAR_INTERRUPT_MASK_FROM_ISR( ulDummy );
}
/*-----------------------------------------------------------*/
/*
* Setup the systick timer to generate the tick interrupts at the required
* frequency.
*/
void prvSetupTimerInterrupt( void )
{
/* Configure SysTick to interrupt at the requested rate. */
*(portNVIC_SYSTICK_LOAD) = ( configCPU_CLOCK_HZ / configTICK_RATE_HZ ) - 1UL;
*(portNVIC_SYSTICK_CTRL) = portNVIC_SYSTICK_CLK | portNVIC_SYSTICK_INT | portNVIC_SYSTICK_ENABLE;
}
/*-----------------------------------------------------------*/

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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
#ifndef PORTMACRO_H
#define PORTMACRO_H
#ifdef __cplusplus
extern "C" {
#endif
/*-----------------------------------------------------------
* Port specific definitions.
*
* The settings in this file configure FreeRTOS correctly for the
* given hardware and compiler.
*
* These settings should not be altered.
*-----------------------------------------------------------
*/
/* Type definitions. */
#define portCHAR char
#define portFLOAT float
#define portDOUBLE double
#define portLONG long
#define portSHORT short
#define portSTACK_TYPE unsigned portLONG
#define portBASE_TYPE long
#if( configUSE_16_BIT_TICKS == 1 )
typedef unsigned portSHORT portTickType;
#define portMAX_DELAY ( portTickType ) 0xffff
#else
typedef unsigned portLONG portTickType;
#define portMAX_DELAY ( portTickType ) 0xffffffff
#endif
/*-----------------------------------------------------------*/
/* Architecture specifics. */
#define portSTACK_GROWTH ( -1 )
#define portTICK_RATE_MS ( ( portTickType ) 1000 / configTICK_RATE_HZ )
#define portBYTE_ALIGNMENT 8
/*-----------------------------------------------------------*/
/* Scheduler utilities. */
extern void vPortYieldFromISR( void );
#define portYIELD() vPortYieldFromISR()
#define portEND_SWITCHING_ISR( xSwitchRequired ) if( xSwitchRequired ) vPortYieldFromISR()
/*-----------------------------------------------------------*/
/* Critical section management. */
/*
* Set basepri to portMAX_SYSCALL_INTERRUPT_PRIORITY without effecting other
* registers. r0 is clobbered.
*/
#define portSET_INTERRUPT_MASK() \
__asm volatile \
( \
" mov r0, %0 \n" \
" msr basepri, r0 \n" \
::"i"(configMAX_SYSCALL_INTERRUPT_PRIORITY):"r0" \
)
/*
* Set basepri back to 0 without effective other registers.
* r0 is clobbered.
*/
#define portCLEAR_INTERRUPT_MASK() \
__asm volatile \
( \
" mov r0, #0 \n" \
" msr basepri, r0 \n" \
:::"r0" \
)
#define portSET_INTERRUPT_MASK_FROM_ISR() 0;portSET_INTERRUPT_MASK()
#define portCLEAR_INTERRUPT_MASK_FROM_ISR(x) portCLEAR_INTERRUPT_MASK();(void)x
extern void vPortEnterCritical( void );
extern void vPortExitCritical( void );
#define portDISABLE_INTERRUPTS() portSET_INTERRUPT_MASK()
#define portENABLE_INTERRUPTS() portCLEAR_INTERRUPT_MASK()
#define portENTER_CRITICAL() vPortEnterCritical()
#define portEXIT_CRITICAL() vPortExitCritical()
/*-----------------------------------------------------------*/
/* Task function macros as described on the FreeRTOS.org WEB site. */
#define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters )
#define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters )
#define portNOP()
#ifdef __cplusplus
}
#endif
#endif /* PORTMACRO_H */

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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
/*
* A sample implementation of pvPortMalloc() and vPortFree() that permits
* allocated blocks to be freed, but does not combine adjacent free blocks
* into a single larger block.
*
* See heap_1.c and heap_3.c for alternative implementations, and the memory
* management pages of http://www.FreeRTOS.org for more information.
*/
#include <stdlib.h>
/* Defining MPU_WRAPPERS_INCLUDED_FROM_API_FILE prevents task.h from redefining
all the API functions to use the MPU wrappers. That should only be done when
task.h is included from an application file. */
#define MPU_WRAPPERS_INCLUDED_FROM_API_FILE
#include "FreeRTOS.h"
#include "task.h"
#undef MPU_WRAPPERS_INCLUDED_FROM_API_FILE
/* Allocate the memory for the heap. The struct is used to force byte
alignment without using any non-portable code. */
static union xRTOS_HEAP
{
#if portBYTE_ALIGNMENT == 8
volatile portDOUBLE dDummy;
#else
volatile unsigned long ulDummy;
#endif
unsigned char ucHeap[ configTOTAL_HEAP_SIZE ];
} xHeap;
/* Define the linked list structure. This is used to link free blocks in order
of their size. */
typedef struct A_BLOCK_LINK
{
struct A_BLOCK_LINK *pxNextFreeBlock; /*<< The next free block in the list. */
size_t xBlockSize; /*<< The size of the free block. */
} xBlockLink;
static const unsigned short heapSTRUCT_SIZE = ( sizeof( xBlockLink ) + portBYTE_ALIGNMENT - ( sizeof( xBlockLink ) % portBYTE_ALIGNMENT ) );
#define heapMINIMUM_BLOCK_SIZE ( ( size_t ) ( heapSTRUCT_SIZE * 2 ) )
/* Create a couple of list links to mark the start and end of the list. */
static xBlockLink xStart, xEnd;
/* Keeps track of the number of free bytes remaining, but says nothing about
fragmentation. */
static size_t xFreeBytesRemaining = configTOTAL_HEAP_SIZE;
/* STATIC FUNCTIONS ARE DEFINED AS MACROS TO MINIMIZE THE FUNCTION CALL DEPTH. */
/*
* Insert a block into the list of free blocks - which is ordered by size of
* the block. Small blocks at the start of the list and large blocks at the end
* of the list.
*/
#define prvInsertBlockIntoFreeList( pxBlockToInsert ) \
{ \
xBlockLink *pxIterator; \
size_t xBlockSize; \
\
xBlockSize = pxBlockToInsert->xBlockSize; \
\
/* Iterate through the list until a block is found that has a larger size */ \
/* than the block we are inserting. */ \
for( pxIterator = &xStart; pxIterator->pxNextFreeBlock->xBlockSize < xBlockSize; pxIterator = pxIterator->pxNextFreeBlock ) \
{ \
/* There is nothing to do here - just iterate to the correct position. */ \
} \
\
/* Update the list to include the block being inserted in the correct */ \
/* position. */ \
pxBlockToInsert->pxNextFreeBlock = pxIterator->pxNextFreeBlock; \
pxIterator->pxNextFreeBlock = pxBlockToInsert; \
}
/*-----------------------------------------------------------*/
#define prvHeapInit() \
{ \
xBlockLink *pxFirstFreeBlock; \
\
/* xStart is used to hold a pointer to the first item in the list of free */ \
/* blocks. The void cast is used to prevent compiler warnings. */ \
xStart.pxNextFreeBlock = ( void * ) xHeap.ucHeap; \
xStart.xBlockSize = ( size_t ) 0; \
\
/* xEnd is used to mark the end of the list of free blocks. */ \
xEnd.xBlockSize = configTOTAL_HEAP_SIZE; \
xEnd.pxNextFreeBlock = NULL; \
\
/* To start with there is a single free block that is sized to take up the \
entire heap space. */ \
pxFirstFreeBlock = ( void * ) xHeap.ucHeap; \
pxFirstFreeBlock->xBlockSize = configTOTAL_HEAP_SIZE; \
pxFirstFreeBlock->pxNextFreeBlock = &xEnd; \
}
/*-----------------------------------------------------------*/
void *pvPortMalloc( size_t xWantedSize )
{
xBlockLink *pxBlock, *pxPreviousBlock, *pxNewBlockLink;
static portBASE_TYPE xHeapHasBeenInitialised = pdFALSE;
void *pvReturn = NULL;
vTaskSuspendAll();
{
/* If this is the first call to malloc then the heap will require
initialisation to setup the list of free blocks. */
if( xHeapHasBeenInitialised == pdFALSE )
{
prvHeapInit();
xHeapHasBeenInitialised = pdTRUE;
}
/* The wanted size is increased so it can contain a xBlockLink
structure in addition to the requested amount of bytes. */
if( xWantedSize > 0 )
{
xWantedSize += heapSTRUCT_SIZE;
/* Ensure that blocks are always aligned to the required number of bytes. */
if( xWantedSize & portBYTE_ALIGNMENT_MASK )
{
/* Byte alignment required. */
xWantedSize += ( portBYTE_ALIGNMENT - ( xWantedSize & portBYTE_ALIGNMENT_MASK ) );
}
}
if( ( xWantedSize > 0 ) && ( xWantedSize < configTOTAL_HEAP_SIZE ) )
{
/* Blocks are stored in byte order - traverse the list from the start
(smallest) block until one of adequate size is found. */
pxPreviousBlock = &xStart;
pxBlock = xStart.pxNextFreeBlock;
while( ( pxBlock->xBlockSize < xWantedSize ) && ( pxBlock->pxNextFreeBlock ) )
{
pxPreviousBlock = pxBlock;
pxBlock = pxBlock->pxNextFreeBlock;
}
/* If we found the end marker then a block of adequate size was not found. */
if( pxBlock != &xEnd )
{
/* Return the memory space - jumping over the xBlockLink structure
at its start. */
pvReturn = ( void * ) ( ( ( unsigned char * ) pxPreviousBlock->pxNextFreeBlock ) + heapSTRUCT_SIZE );
/* This block is being returned for use so must be taken our of the
list of free blocks. */
pxPreviousBlock->pxNextFreeBlock = pxBlock->pxNextFreeBlock;
/* If the block is larger than required it can be split into two. */
if( ( pxBlock->xBlockSize - xWantedSize ) > heapMINIMUM_BLOCK_SIZE )
{
/* This block is to be split into two. Create a new block
following the number of bytes requested. The void cast is
used to prevent byte alignment warnings from the compiler. */
pxNewBlockLink = ( void * ) ( ( ( unsigned char * ) pxBlock ) + xWantedSize );
/* Calculate the sizes of two blocks split from the single
block. */
pxNewBlockLink->xBlockSize = pxBlock->xBlockSize - xWantedSize;
pxBlock->xBlockSize = xWantedSize;
/* Insert the new block into the list of free blocks. */
prvInsertBlockIntoFreeList( ( pxNewBlockLink ) );
}
xFreeBytesRemaining -= pxBlock->xBlockSize;
}
}
}
xTaskResumeAll();
#if( configUSE_MALLOC_FAILED_HOOK == 1 )
{
if( pvReturn == NULL )
{
extern void vApplicationMallocFailedHook( void );
vApplicationMallocFailedHook();
}
}
#endif
return pvReturn;
}
/*-----------------------------------------------------------*/
void vPortFree( void *pv )
{
unsigned char *puc = ( unsigned char * ) pv;
xBlockLink *pxLink;
if( pv )
{
/* The memory being freed will have an xBlockLink structure immediately
before it. */
puc -= heapSTRUCT_SIZE;
/* This casting is to keep the compiler from issuing warnings. */
pxLink = ( void * ) puc;
vTaskSuspendAll();
{
/* Add this block to the list of free blocks. */
prvInsertBlockIntoFreeList( ( ( xBlockLink * ) pxLink ) );
xFreeBytesRemaining += pxLink->xBlockSize;
}
xTaskResumeAll();
}
}
/*-----------------------------------------------------------*/
size_t xPortGetFreeHeapSize( void )
{
return xFreeBytesRemaining;
}
/*-----------------------------------------------------------*/
void vPortInitialiseBlocks( void )
{
/* This just exists to keep the linker quiet. */
}

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/*
FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
>>>NOTE<<< The modification to the GPL is included to allow you to
distribute a combined work that includes FreeRTOS without being obliged to
provide the source code for proprietary components outside of the FreeRTOS
kernel. FreeRTOS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong? *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, training, latest information,
license and contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool.
Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
the code with commercial support, indemnification, and middleware, under
the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand: http://www.SafeRTOS.com.
*/
/* Defining MPU_WRAPPERS_INCLUDED_FROM_API_FILE prevents task.h from redefining
all the API functions to use the MPU wrappers. That should only be done when
task.h is included from an application file. */
#define MPU_WRAPPERS_INCLUDED_FROM_API_FILE
#include "FreeRTOS.h"
#include "task.h"
#include "queue.h"
#include "timers.h"
#undef MPU_WRAPPERS_INCLUDED_FROM_API_FILE
/* This entire source file will be skipped if the application is not configured
to include software timer functionality. This #if is closed at the very bottom
of this file. If you want to include software timer functionality then ensure
configUSE_TIMERS is set to 1 in FreeRTOSConfig.h. */
#if ( configUSE_TIMERS == 1 )
/* Misc definitions. */
#define tmrNO_DELAY ( portTickType ) 0U
/* The definition of the timers themselves. */
typedef struct tmrTimerControl
{
const signed char *pcTimerName; /*<< Text name. This is not used by the kernel, it is included simply to make debugging easier. */
xListItem xTimerListItem; /*<< Standard linked list item as used by all kernel features for event management. */
portTickType xTimerPeriodInTicks;/*<< How quickly and often the timer expires. */
unsigned portBASE_TYPE uxAutoReload; /*<< Set to pdTRUE if the timer should be automatically restarted once expired. Set to pdFALSE if the timer is, in effect, a one shot timer. */
void *pvTimerID; /*<< An ID to identify the timer. This allows the timer to be identified when the same callback is used for multiple timers. */
tmrTIMER_CALLBACK pxCallbackFunction; /*<< The function that will be called when the timer expires. */
} xTIMER;
/* The definition of messages that can be sent and received on the timer
queue. */
typedef struct tmrTimerQueueMessage
{
portBASE_TYPE xMessageID; /*<< The command being sent to the timer service task. */
portTickType xMessageValue; /*<< An optional value used by a subset of commands, for example, when changing the period of a timer. */
xTIMER * pxTimer; /*<< The timer to which the command will be applied. */
} xTIMER_MESSAGE;
/* The list in which active timers are stored. Timers are referenced in expire
time order, with the nearest expiry time at the front of the list. Only the
timer service task is allowed to access xActiveTimerList. */
PRIVILEGED_DATA static xList xActiveTimerList1;
PRIVILEGED_DATA static xList xActiveTimerList2;
PRIVILEGED_DATA static xList *pxCurrentTimerList;
PRIVILEGED_DATA static xList *pxOverflowTimerList;
/* A queue that is used to send commands to the timer service task. */
PRIVILEGED_DATA static xQueueHandle xTimerQueue = NULL;
#if ( INCLUDE_xTimerGetTimerDaemonTaskHandle == 1 )
PRIVILEGED_DATA static xTaskHandle xTimerTaskHandle = NULL;
#endif
/*-----------------------------------------------------------*/
/*
* Initialise the infrastructure used by the timer service task if it has not
* been initialised already.
*/
static void prvCheckForValidListAndQueue( void ) PRIVILEGED_FUNCTION;
/*
* The timer service task (daemon). Timer functionality is controlled by this
* task. Other tasks communicate with the timer service task using the
* xTimerQueue queue.
*/
static void prvTimerTask( void *pvParameters ) PRIVILEGED_FUNCTION;
/*
* Called by the timer service task to interpret and process a command it
* received on the timer queue.
*/
static void prvProcessReceivedCommands( void ) PRIVILEGED_FUNCTION;
/*
* Insert the timer into either xActiveTimerList1, or xActiveTimerList2,
* depending on if the expire time causes a timer counter overflow.
*/
static portBASE_TYPE prvInsertTimerInActiveList( xTIMER *pxTimer, portTickType xNextExpiryTime, portTickType xTimeNow, portTickType xCommandTime ) PRIVILEGED_FUNCTION;
/*
* An active timer has reached its expire time. Reload the timer if it is an
* auto reload timer, then call its callback.
*/
static void prvProcessExpiredTimer( portTickType xNextExpireTime, portTickType xTimeNow ) PRIVILEGED_FUNCTION;
/*
* The tick count has overflowed. Switch the timer lists after ensuring the
* current timer list does not still reference some timers.
*/
static void prvSwitchTimerLists( portTickType xLastTime ) PRIVILEGED_FUNCTION;
/*
* Obtain the current tick count, setting *pxTimerListsWereSwitched to pdTRUE
* if a tick count overflow occurred since prvSampleTimeNow() was last called.
*/
static portTickType prvSampleTimeNow( portBASE_TYPE *pxTimerListsWereSwitched ) PRIVILEGED_FUNCTION;
/*
* If the timer list contains any active timers then return the expire time of
* the timer that will expire first and set *pxListWasEmpty to false. If the
* timer list does not contain any timers then return 0 and set *pxListWasEmpty
* to pdTRUE.
*/
static portTickType prvGetNextExpireTime( portBASE_TYPE *pxListWasEmpty ) PRIVILEGED_FUNCTION;
/*
* If a timer has expired, process it. Otherwise, block the timer service task
* until either a timer does expire or a command is received.
*/
static void prvProcessTimerOrBlockTask( portTickType xNextExpireTime, portBASE_TYPE xListWasEmpty ) PRIVILEGED_FUNCTION;
/*-----------------------------------------------------------*/
portBASE_TYPE xTimerCreateTimerTask( void )
{
portBASE_TYPE xReturn = pdFAIL;
/* This function is called when the scheduler is started if
configUSE_TIMERS is set to 1. Check that the infrastructure used by the
timer service task has been created/initialised. If timers have already
been created then the initialisation will already have been performed. */
prvCheckForValidListAndQueue();
if( xTimerQueue != NULL )
{
#if ( INCLUDE_xTimerGetTimerDaemonTaskHandle == 1 )
{
/* Create the timer task, storing its handle in xTimerTaskHandle so
it can be returned by the xTimerGetTimerDaemonTaskHandle() function. */
xReturn = xTaskCreate( prvTimerTask, ( const signed char * ) "Tmr Svc", ( unsigned short ) configTIMER_TASK_STACK_DEPTH, NULL, ( unsigned portBASE_TYPE ) configTIMER_TASK_PRIORITY, &xTimerTaskHandle );
}
#else
{
/* Create the timer task without storing its handle. */
xReturn = xTaskCreate( prvTimerTask, ( const signed char * ) "Tmr Svc", ( unsigned short ) configTIMER_TASK_STACK_DEPTH, NULL, ( unsigned portBASE_TYPE ) configTIMER_TASK_PRIORITY, NULL);
}
#endif
}
configASSERT( xReturn );
return xReturn;
}
/*-----------------------------------------------------------*/
xTimerHandle xTimerCreate( const signed char *pcTimerName, portTickType xTimerPeriodInTicks, unsigned portBASE_TYPE uxAutoReload, void *pvTimerID, tmrTIMER_CALLBACK pxCallbackFunction )
{
xTIMER *pxNewTimer;
/* Allocate the timer structure. */
if( xTimerPeriodInTicks == ( portTickType ) 0U )
{
pxNewTimer = NULL;
configASSERT( ( xTimerPeriodInTicks > 0 ) );
}
else
{
pxNewTimer = ( xTIMER * ) pvPortMalloc( sizeof( xTIMER ) );
if( pxNewTimer != NULL )
{
/* Ensure the infrastructure used by the timer service task has been
created/initialised. */
prvCheckForValidListAndQueue();
/* Initialise the timer structure members using the function parameters. */
pxNewTimer->pcTimerName = pcTimerName;
pxNewTimer->xTimerPeriodInTicks = xTimerPeriodInTicks;
pxNewTimer->uxAutoReload = uxAutoReload;
pxNewTimer->pvTimerID = pvTimerID;
pxNewTimer->pxCallbackFunction = pxCallbackFunction;
vListInitialiseItem( &( pxNewTimer->xTimerListItem ) );
traceTIMER_CREATE( pxNewTimer );
}
else
{
traceTIMER_CREATE_FAILED();
}
}
return ( xTimerHandle ) pxNewTimer;
}
/*-----------------------------------------------------------*/
portBASE_TYPE xTimerGenericCommand( xTimerHandle xTimer, portBASE_TYPE xCommandID, portTickType xOptionalValue, signed portBASE_TYPE *pxHigherPriorityTaskWoken, portTickType xBlockTime )
{
portBASE_TYPE xReturn = pdFAIL;
xTIMER_MESSAGE xMessage;
/* Send a message to the timer service task to perform a particular action
on a particular timer definition. */
if( xTimerQueue != NULL )
{
/* Send a command to the timer service task to start the xTimer timer. */
xMessage.xMessageID = xCommandID;
xMessage.xMessageValue = xOptionalValue;
xMessage.pxTimer = ( xTIMER * ) xTimer;
if( pxHigherPriorityTaskWoken == NULL )
{
if( xTaskGetSchedulerState() == taskSCHEDULER_RUNNING )
{
xReturn = xQueueSendToBack( xTimerQueue, &xMessage, xBlockTime );
}
else
{
xReturn = xQueueSendToBack( xTimerQueue, &xMessage, tmrNO_DELAY );
}
}
else
{
xReturn = xQueueSendToBackFromISR( xTimerQueue, &xMessage, pxHigherPriorityTaskWoken );
}
traceTIMER_COMMAND_SEND( xTimer, xCommandID, xOptionalValue, xReturn );
}
return xReturn;
}
/*-----------------------------------------------------------*/
#if ( INCLUDE_xTimerGetTimerDaemonTaskHandle == 1 )
xTaskHandle xTimerGetTimerDaemonTaskHandle( void )
{
/* If xTimerGetTimerDaemonTaskHandle() is called before the scheduler has been
started, then xTimerTaskHandle will be NULL. */
configASSERT( ( xTimerTaskHandle != NULL ) );
return xTimerTaskHandle;
}
#endif
/*-----------------------------------------------------------*/
static void prvProcessExpiredTimer( portTickType xNextExpireTime, portTickType xTimeNow )
{
xTIMER *pxTimer;
portBASE_TYPE xResult;
/* Remove the timer from the list of active timers. A check has already
been performed to ensure the list is not empty. */
pxTimer = ( xTIMER * ) listGET_OWNER_OF_HEAD_ENTRY( pxCurrentTimerList );
vListRemove( &( pxTimer->xTimerListItem ) );
traceTIMER_EXPIRED( pxTimer );
/* If the timer is an auto reload timer then calculate the next
expiry time and re-insert the timer in the list of active timers. */
if( pxTimer->uxAutoReload == ( unsigned portBASE_TYPE ) pdTRUE )
{
/* This is the only time a timer is inserted into a list using
a time relative to anything other than the current time. It
will therefore be inserted into the correct list relative to
the time this task thinks it is now, even if a command to
switch lists due to a tick count overflow is already waiting in
the timer queue. */
if( prvInsertTimerInActiveList( pxTimer, ( xNextExpireTime + pxTimer->xTimerPeriodInTicks ), xTimeNow, xNextExpireTime ) == pdTRUE )
{
/* The timer expired before it was added to the active timer
list. Reload it now. */
xResult = xTimerGenericCommand( pxTimer, tmrCOMMAND_START, xNextExpireTime, NULL, tmrNO_DELAY );
configASSERT( xResult );
( void ) xResult;
}
}
/* Call the timer callback. */
pxTimer->pxCallbackFunction( ( xTimerHandle ) pxTimer );
}
/*-----------------------------------------------------------*/
static void prvTimerTask( void *pvParameters )
{
portTickType xNextExpireTime;
portBASE_TYPE xListWasEmpty;
/* Just to avoid compiler warnings. */
( void ) pvParameters;
for( ;; )
{
/* Query the timers list to see if it contains any timers, and if so,
obtain the time at which the next timer will expire. */
xNextExpireTime = prvGetNextExpireTime( &xListWasEmpty );
/* If a timer has expired, process it. Otherwise, block this task
until either a timer does expire, or a command is received. */
prvProcessTimerOrBlockTask( xNextExpireTime, xListWasEmpty );
/* Empty the command queue. */
prvProcessReceivedCommands();
}
}
/*-----------------------------------------------------------*/
static void prvProcessTimerOrBlockTask( portTickType xNextExpireTime, portBASE_TYPE xListWasEmpty )
{
portTickType xTimeNow;
portBASE_TYPE xTimerListsWereSwitched;
vTaskSuspendAll();
{
/* Obtain the time now to make an assessment as to whether the timer
has expired or not. If obtaining the time causes the lists to switch
then don't process this timer as any timers that remained in the list
when the lists were switched will have been processed within the
prvSampelTimeNow() function. */
xTimeNow = prvSampleTimeNow( &xTimerListsWereSwitched );
if( xTimerListsWereSwitched == pdFALSE )
{
/* The tick count has not overflowed, has the timer expired? */
if( ( xListWasEmpty == pdFALSE ) && ( xNextExpireTime <= xTimeNow ) )
{
xTaskResumeAll();
prvProcessExpiredTimer( xNextExpireTime, xTimeNow );
}
else
{
/* The tick count has not overflowed, and the next expire
time has not been reached yet. This task should therefore
block to wait for the next expire time or a command to be
received - whichever comes first. The following line cannot
be reached unless xNextExpireTime > xTimeNow, except in the
case when the current timer list is empty. */
vQueueWaitForMessageRestricted( xTimerQueue, ( xNextExpireTime - xTimeNow ) );
if( xTaskResumeAll() == pdFALSE )
{
/* Yield to wait for either a command to arrive, or the block time
to expire. If a command arrived between the critical section being
exited and this yield then the yield will not cause the task
to block. */
portYIELD_WITHIN_API();
}
}
}
else
{
xTaskResumeAll();
}
}
}
/*-----------------------------------------------------------*/
static portTickType prvGetNextExpireTime( portBASE_TYPE *pxListWasEmpty )
{
portTickType xNextExpireTime;
/* Timers are listed in expiry time order, with the head of the list
referencing the task that will expire first. Obtain the time at which
the timer with the nearest expiry time will expire. If there are no
active timers then just set the next expire time to 0. That will cause
this task to unblock when the tick count overflows, at which point the
timer lists will be switched and the next expiry time can be
re-assessed. */
*pxListWasEmpty = listLIST_IS_EMPTY( pxCurrentTimerList );
if( *pxListWasEmpty == pdFALSE )
{
xNextExpireTime = listGET_ITEM_VALUE_OF_HEAD_ENTRY( pxCurrentTimerList );
}
else
{
/* Ensure the task unblocks when the tick count rolls over. */
xNextExpireTime = ( portTickType ) 0U;
}
return xNextExpireTime;
}
/*-----------------------------------------------------------*/
static portTickType prvSampleTimeNow( portBASE_TYPE *pxTimerListsWereSwitched )
{
portTickType xTimeNow;
static portTickType xLastTime = ( portTickType ) 0U;
xTimeNow = xTaskGetTickCount();
if( xTimeNow < xLastTime )
{
prvSwitchTimerLists( xLastTime );
*pxTimerListsWereSwitched = pdTRUE;
}
else
{
*pxTimerListsWereSwitched = pdFALSE;
}
xLastTime = xTimeNow;
return xTimeNow;
}
/*-----------------------------------------------------------*/
static portBASE_TYPE prvInsertTimerInActiveList( xTIMER *pxTimer, portTickType xNextExpiryTime, portTickType xTimeNow, portTickType xCommandTime )
{
portBASE_TYPE xProcessTimerNow = pdFALSE;
listSET_LIST_ITEM_VALUE( &( pxTimer->xTimerListItem ), xNextExpiryTime );
listSET_LIST_ITEM_OWNER( &( pxTimer->xTimerListItem ), pxTimer );
if( xNextExpiryTime <= xTimeNow )
{
/* Has the expiry time elapsed between the command to start/reset a
timer was issued, and the time the command was processed? */
if( ( ( portTickType ) ( xTimeNow - xCommandTime ) ) >= pxTimer->xTimerPeriodInTicks )
{
/* The time between a command being issued and the command being
processed actually exceeds the timers period. */
xProcessTimerNow = pdTRUE;
}
else
{
vListInsert( pxOverflowTimerList, &( pxTimer->xTimerListItem ) );
}
}
else
{
if( ( xTimeNow < xCommandTime ) && ( xNextExpiryTime >= xCommandTime ) )
{
/* If, since the command was issued, the tick count has overflowed
but the expiry time has not, then the timer must have already passed
its expiry time and should be processed immediately. */
xProcessTimerNow = pdTRUE;
}
else
{
vListInsert( pxCurrentTimerList, &( pxTimer->xTimerListItem ) );
}
}
return xProcessTimerNow;
}
/*-----------------------------------------------------------*/
static void prvProcessReceivedCommands( void )
{
xTIMER_MESSAGE xMessage;
xTIMER *pxTimer;
portBASE_TYPE xTimerListsWereSwitched, xResult;
portTickType xTimeNow;
/* In this case the xTimerListsWereSwitched parameter is not used, but it
must be present in the function call. */
xTimeNow = prvSampleTimeNow( &xTimerListsWereSwitched );
while( xQueueReceive( xTimerQueue, &xMessage, tmrNO_DELAY ) != pdFAIL )
{
pxTimer = xMessage.pxTimer;
/* Is the timer already in a list of active timers? When the command
is trmCOMMAND_PROCESS_TIMER_OVERFLOW, the timer will be NULL as the
command is to the task rather than to an individual timer. */
if( pxTimer != NULL )
{
if( listIS_CONTAINED_WITHIN( NULL, &( pxTimer->xTimerListItem ) ) == pdFALSE )
{
/* The timer is in a list, remove it. */
vListRemove( &( pxTimer->xTimerListItem ) );
}
}
traceTIMER_COMMAND_RECEIVED( pxTimer, xMessage.xMessageID, xMessage.xMessageValue );
switch( xMessage.xMessageID )
{
case tmrCOMMAND_START :
/* Start or restart a timer. */
if( prvInsertTimerInActiveList( pxTimer, xMessage.xMessageValue + pxTimer->xTimerPeriodInTicks, xTimeNow, xMessage.xMessageValue ) == pdTRUE )
{
/* The timer expired before it was added to the active timer
list. Process it now. */
pxTimer->pxCallbackFunction( ( xTimerHandle ) pxTimer );
if( pxTimer->uxAutoReload == ( unsigned portBASE_TYPE ) pdTRUE )
{
xResult = xTimerGenericCommand( pxTimer, tmrCOMMAND_START, xMessage.xMessageValue + pxTimer->xTimerPeriodInTicks, NULL, tmrNO_DELAY );
configASSERT( xResult );
( void ) xResult;
}
}
break;
case tmrCOMMAND_STOP :
/* The timer has already been removed from the active list.
There is nothing to do here. */
break;
case tmrCOMMAND_CHANGE_PERIOD :
pxTimer->xTimerPeriodInTicks = xMessage.xMessageValue;
configASSERT( ( pxTimer->xTimerPeriodInTicks > 0 ) );
prvInsertTimerInActiveList( pxTimer, ( xTimeNow + pxTimer->xTimerPeriodInTicks ), xTimeNow, xTimeNow );
break;
case tmrCOMMAND_DELETE :
/* The timer has already been removed from the active list,
just free up the memory. */
vPortFree( pxTimer );
break;
default :
/* Don't expect to get here. */
break;
}
}
}
/*-----------------------------------------------------------*/
static void prvSwitchTimerLists( portTickType xLastTime )
{
portTickType xNextExpireTime, xReloadTime;
xList *pxTemp;
xTIMER *pxTimer;
portBASE_TYPE xResult;
/* Remove compiler warnings if configASSERT() is not defined. */
( void ) xLastTime;
/* The tick count has overflowed. The timer lists must be switched.
If there are any timers still referenced from the current timer list
then they must have expired and should be processed before the lists
are switched. */
while( listLIST_IS_EMPTY( pxCurrentTimerList ) == pdFALSE )
{
xNextExpireTime = listGET_ITEM_VALUE_OF_HEAD_ENTRY( pxCurrentTimerList );
/* Remove the timer from the list. */
pxTimer = ( xTIMER * ) listGET_OWNER_OF_HEAD_ENTRY( pxCurrentTimerList );
vListRemove( &( pxTimer->xTimerListItem ) );
/* Execute its callback, then send a command to restart the timer if
it is an auto-reload timer. It cannot be restarted here as the lists
have not yet been switched. */
pxTimer->pxCallbackFunction( ( xTimerHandle ) pxTimer );
if( pxTimer->uxAutoReload == ( unsigned portBASE_TYPE ) pdTRUE )
{
/* Calculate the reload value, and if the reload value results in
the timer going into the same timer list then it has already expired
and the timer should be re-inserted into the current list so it is
processed again within this loop. Otherwise a command should be sent
to restart the timer to ensure it is only inserted into a list after
the lists have been swapped. */
xReloadTime = ( xNextExpireTime + pxTimer->xTimerPeriodInTicks );
if( xReloadTime > xNextExpireTime )
{
listSET_LIST_ITEM_VALUE( &( pxTimer->xTimerListItem ), xReloadTime );
listSET_LIST_ITEM_OWNER( &( pxTimer->xTimerListItem ), pxTimer );
vListInsert( pxCurrentTimerList, &( pxTimer->xTimerListItem ) );
}
else
{
xResult = xTimerGenericCommand( pxTimer, tmrCOMMAND_START, xNextExpireTime, NULL, tmrNO_DELAY );
configASSERT( xResult );
( void ) xResult;
}
}
}
pxTemp = pxCurrentTimerList;
pxCurrentTimerList = pxOverflowTimerList;
pxOverflowTimerList = pxTemp;
}
/*-----------------------------------------------------------*/
static void prvCheckForValidListAndQueue( void )
{
/* Check that the list from which active timers are referenced, and the
queue used to communicate with the timer service, have been
initialised. */
taskENTER_CRITICAL();
{
if( xTimerQueue == NULL )
{
vListInitialise( &xActiveTimerList1 );
vListInitialise( &xActiveTimerList2 );
pxCurrentTimerList = &xActiveTimerList1;
pxOverflowTimerList = &xActiveTimerList2;
xTimerQueue = xQueueCreate( ( unsigned portBASE_TYPE ) configTIMER_QUEUE_LENGTH, sizeof( xTIMER_MESSAGE ) );
}
}
taskEXIT_CRITICAL();
}
/*-----------------------------------------------------------*/
portBASE_TYPE xTimerIsTimerActive( xTimerHandle xTimer )
{
portBASE_TYPE xTimerIsInActiveList;
xTIMER *pxTimer = ( xTIMER * ) xTimer;
/* Is the timer in the list of active timers? */
taskENTER_CRITICAL();
{
/* Checking to see if it is in the NULL list in effect checks to see if
it is referenced from either the current or the overflow timer lists in
one go, but the logic has to be reversed, hence the '!'. */
xTimerIsInActiveList = !( listIS_CONTAINED_WITHIN( NULL, &( pxTimer->xTimerListItem ) ) );
}
taskEXIT_CRITICAL();
return xTimerIsInActiveList;
}
/*-----------------------------------------------------------*/
void *pvTimerGetTimerID( xTimerHandle xTimer )
{
xTIMER *pxTimer = ( xTIMER * ) xTimer;
return pxTimer->pvTimerID;
}
/*-----------------------------------------------------------*/
/* This entire source file will be skipped if the application is not configured
to include software timer functionality. If you want to include software timer
functionality then ensure configUSE_TIMERS is set to 1 in FreeRTOSConfig.h. */
#endif /* configUSE_TIMERS == 1 */
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