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293 lines
12 KiB
C
293 lines
12 KiB
C
/*
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FreeRTOS V7.4.0 - Copyright (C) 2013 Real Time Engineers Ltd.
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FEATURES AND PORTS ARE ADDED TO FREERTOS ALL THE TIME. PLEASE VISIT
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http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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***************************************************************************
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* *
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* FreeRTOS tutorial books are available in pdf and paperback. *
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* Complete, revised, and edited pdf reference manuals are also *
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* available. *
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* *
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* Purchasing FreeRTOS documentation will not only help you, by *
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* ensuring you get running as quickly as possible and with an *
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* in-depth knowledge of how to use FreeRTOS, it will also help *
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* the FreeRTOS project to continue with its mission of providing *
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* professional grade, cross platform, de facto standard solutions *
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* for microcontrollers - completely free of charge! *
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* *
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* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
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* *
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* Thank you for using FreeRTOS, and thank you for your support! *
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* *
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***************************************************************************
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This file is part of the FreeRTOS distribution.
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FreeRTOS is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License (version 2) as published by the
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Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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>>>>>>NOTE<<<<<< The modification to the GPL is included to allow you to
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distribute a combined work that includes FreeRTOS without being obliged to
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provide the source code for proprietary components outside of the FreeRTOS
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kernel.
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FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details. You should have received a copy of the GNU General Public License
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and the FreeRTOS license exception along with FreeRTOS; if not itcan be
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viewed here: http://www.freertos.org/a00114.html and also obtained by
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writing to Real Time Engineers Ltd., contact details for whom are available
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on the FreeRTOS WEB site.
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1 tab == 4 spaces!
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***************************************************************************
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* *
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* Having a problem? Start by reading the FAQ "My application does *
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* not run, what could be wrong?" *
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* *
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* http://www.FreeRTOS.org/FAQHelp.html *
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* *
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***************************************************************************
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http://www.FreeRTOS.org - Documentation, books, training, latest versions,
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license and Real Time Engineers Ltd. contact details.
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http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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including FreeRTOS+Trace - an indispensable productivity tool, and our new
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fully thread aware and reentrant UDP/IP stack.
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http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
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Integrity Systems, who sell the code with commercial support,
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indemnification and middleware, under the OpenRTOS brand.
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http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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engineered and independently SIL3 certified version for use in safety and
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mission critical applications that require provable dependability.
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*/
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/*
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* Creates all the demo application tasks, then starts the scheduler. The WEB
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* documentation provides more details of the standard demo application tasks.
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* In addition to the standard demo tasks, the following tasks and tests are
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* defined and/or created within this file:
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*
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* "LCD test" task - the LCD task writes a continually repeating series of patterns
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* to the LCD display.
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*
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* "LED test" task - This is a very simple task that just turns on user LEDs
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* 8 to 15 in turn, before turning them off again.
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*
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* "Check task" - The check task only runs every five seconds but has the highest
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* priority so is guaranteed to get processing time. Its main job is to inspect
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* all the other standard demo tasks to ensure they are executing without error.
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* The Check task will toggle LED 0 every five seconds while no errors exist,
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* with the toggle frequency increasing to 200ms should an error be detected in
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* any other task.
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*
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* Both the check task and the idle task place the processor into energy saving
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* mode 1, which will be exited following each tick interrupt. The check task
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* is the highest priority task in the system, so while it is executing no other
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* task will execute. If the check task places the processor into a low power
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* mode without blocking then the energy consumption as viewed on the Energy
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* Micro Gecko board will go down noticeably as in effect no tasks will be running.
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* The check task places the processor into low power mode for two out of every
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* five seconds. The current use of low power modes is very basic. Future
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* FreeRTOS releases will aim to make significant improvements.
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*
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*/
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/* Scheduler includes. */
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#include "FreeRTOS.h"
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#include "croutine.h"
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#include "task.h"
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#include "queue.h"
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#include "semphr.h"
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/* Common demo application includes. */
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#include "partest.h"
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#include "GenQTest.h"
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#include "QPeek.h"
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#include "recmutex.h"
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#include "semtest.h"
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/* Demo application includes. */
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#include "lcdcontroller.h"
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#include "ledtest.h"
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#include "lcdtest.h"
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#include "chip.h"
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/* Task priorities. */
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#define mainLCD_TASK_PRIORITY ( tskIDLE_PRIORITY + 1 )
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#define mainLED_TASK_PRIORITY ( tskIDLE_PRIORITY + 2 )
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#define mainGEN_Q_TASK_PRIORITY ( tskIDLE_PRIORITY )
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#define mainSEMAPHORE_TASK_PRIORITY ( tskIDLE_PRIORITY + 1 )
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#define mainCHECK_TASK_PRIORITY ( tskIDLE_PRIORITY + 3 )
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/* A period of two seconds, adjusted to use the tick frequency. */
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#define mainTWO_SECONDS ( 2000 / portTICK_RATE_MS )
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/* The length of the delay between each cycle of the check task when an error
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has / has not been detected. */
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#define mainNO_ERROR_CHECK_FREQUENCY ( 5000 / portTICK_RATE_MS )
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#define mainERROR_CHECK_FREQUENCY ( 200 / portTICK_RATE_MS )
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/* The LED that is toggled by the check task. The rate of the toggle indicates
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whether or not an error has been found, as defined by the
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mainNO_ERROR_CHECK_FREQUENCY and mainERROR_CHECK_FREQUENCY definitions above. */
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#define mainCHECK_LED ( 0 )
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/*-----------------------------------------------------------*/
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/*
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* Configure the hardware as required by the demo.
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*/
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static void prvSetupHardware( void );
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/*
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* The check task as described at the top of this file.
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*/
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static void prvCheckTask( void *pvParameters );
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/*
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* Put the CPU into the least low power low power mode.
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*/
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static void prvLowPowerMode1( void );
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/*-----------------------------------------------------------*/
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int main( void )
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{
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/* Perform the necessary hardware configuration. */
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prvSetupHardware();
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/* Create the task that writes various text and patterns to the LCD. */
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xTaskCreate( vLCDTask, "LCD", configMINIMAL_STACK_SIZE, NULL, mainLCD_TASK_PRIORITY, NULL );
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/* Create a task that writes to LEDs 8 to 15. */
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xTaskCreate( vLEDTask, "LCDTask", configMINIMAL_STACK_SIZE, NULL, mainLED_TASK_PRIORITY, NULL );
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/* Create some of the standard demo tasks. These just test the port and
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demonstrate how the FreeRTOS API can be used. They do not provide any
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specific functionality. */
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vStartGenericQueueTasks( mainGEN_Q_TASK_PRIORITY );
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vStartQueuePeekTasks();
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vStartRecursiveMutexTasks();
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vStartSemaphoreTasks( mainSEMAPHORE_TASK_PRIORITY );
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/* Create the check task as described at the top of this file. */
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xTaskCreate( prvCheckTask, "Check", configMINIMAL_STACK_SIZE, NULL, mainCHECK_TASK_PRIORITY, NULL );
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/* Start the scheduler. */
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vTaskStartScheduler();
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/* The scheduler should now be running the tasks so the following code should
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never be reached. If it is reached then there was insufficient heap space
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for the idle task to be created. In this case the heap size is set by
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configTOTAL_HEAP_SIZE in FreeRTOSConfig.h. */
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for( ;; );
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}
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/*-----------------------------------------------------------*/
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void vApplicationIdleHook( void )
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{
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/* Use the idle task to place the CPU into a low power mode. Greater power
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saving could be achieved by not including any demo tasks that never block. */
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prvLowPowerMode1();
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}
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/*-----------------------------------------------------------*/
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void vApplicationStackOverflowHook( xTaskHandle pxTask, signed char *pcTaskName )
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{
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/* This function will be called if a task overflows its stack, if
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configCHECK_FOR_STACK_OVERFLOW != 0. It might be that the function
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parameters have been corrupted, depending on the severity of the stack
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overflow. When this is the case pxCurrentTCB can be inspected in the
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debugger to find the offending task. */
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for( ;; );
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}
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/*-----------------------------------------------------------*/
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static void prvCheckTask( void *pvParameters )
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{
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portTickType xLastExecutionTime, xFrequency = mainNO_ERROR_CHECK_FREQUENCY;
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long lCount;
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/* Initialise xLastExecutionTime so the first call to vTaskDelayUntil()
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works correctly. */
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xLastExecutionTime = xTaskGetTickCount();
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for( ;; )
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{
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/* Perform this check at a frequency that indicates whether or not an
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error has been found. */
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vTaskDelayUntil( &xLastExecutionTime, xFrequency );
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/* Check all the other tasks are running without error. */
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if( xAreGenericQueueTasksStillRunning() != pdPASS )
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{
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xFrequency = mainERROR_CHECK_FREQUENCY;
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}
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if( xAreQueuePeekTasksStillRunning() != pdPASS )
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{
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xFrequency = mainERROR_CHECK_FREQUENCY;
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}
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if( xAreRecursiveMutexTasksStillRunning() != pdPASS )
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{
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xFrequency = mainERROR_CHECK_FREQUENCY;
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}
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if( xAreSemaphoreTasksStillRunning() != pdPASS )
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{
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xFrequency = mainERROR_CHECK_FREQUENCY;
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}
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/* Toggle the LED to show that the check hook function is running.
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The toggle freequency will increase if an error has been found in any
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task. */
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vParTestToggleLED( mainCHECK_LED );
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/* Just loop around putting the processor into low power mode 1 for
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a while. This is the highest priority task, and this loop does not
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cause it to block, so it will remain as the running task. Each time it
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runs for the next two seconds it will simply put the processor to sleep.
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No other task will run so nothing else will happen. This periodic two
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seconds of lower power should be viewable using the Advanced Energy
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Monitor on the Energy Micro Gecko board. */
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for( lCount = 0; lCount < mainTWO_SECONDS; lCount++ )
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{
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prvLowPowerMode1();
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}
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}
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}
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/*-----------------------------------------------------------*/
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static void prvSetupHardware( void )
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{
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/* Initialise the LEDs. */
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vParTestInitialise();
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/* Configure the LCD. */
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LCD_Init( LCD );
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}
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/*-----------------------------------------------------------*/
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static void prvLowPowerMode1( void )
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{
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/* Clear SLEEPDEEP for EM1 */
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SCB->SCR &= ~( 1 << SCB_SCR_SLEEPDEEP_Pos );
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/* Power down. */
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__WFI();
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}
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