Add the comtest_strings.c and serial.c files - Tx is workings, but both files are still a work in progress.
Richard Barry
14 years ago
parent
2874006c7b
commit
7b24b4c30c
@ -0,0 +1,297 @@
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/*
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FreeRTOS V7.0.1 - Copyright (C) 2011 Real Time Engineers Ltd.
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***************************************************************************
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* *
|
||||
* 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! *
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||||
* *
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||||
***************************************************************************
|
||||
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||||
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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!
|
||||
|
||||
http://www.FreeRTOS.org - Documentation, latest information, license and
|
||||
contact details.
|
||||
|
||||
http://www.SafeRTOS.com - A version that is certified for use in safety
|
||||
critical systems.
|
||||
|
||||
http://www.OpenRTOS.com - Commercial support, development, porting,
|
||||
licensing and training services.
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||||
*/
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/*
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* This version of comtest. c is for use on systems that have limited stack
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* space and no display facilities. The complete version can be found in
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* the Demo/Common/Full directory.
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*
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* Creates two tasks that operate on an interrupt driven serial port. A
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* loopback connector should be used so that everything that is transmitted is
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* also received. The serial port does not use any flow control. On a
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* standard 9way 'D' connector pins two and three should be connected together.
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*
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* The first task posts a sequence of characters to the Tx queue, toggling an
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* LED on each successful post. At the end of the sequence it sleeps for a
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* pseudo-random period before resending the same sequence.
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*
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* The UART Tx end interrupt is enabled whenever data is available in the Tx
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* queue. The Tx end ISR removes a single character from the Tx queue and
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* passes it to the UART for transmission.
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*
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* The second task blocks on the Rx queue waiting for a character to become
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* available. When the UART Rx end interrupt receives a character it places
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* it in the Rx queue, waking the second task. The second task checks that the
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* characters removed from the Rx queue form the same sequence as those posted
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* to the Tx queue, and toggles an LED for each correct character.
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*
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* The receiving task is spawned with a higher priority than the transmitting
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* task. The receiver will therefore wake every time a character is
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* transmitted so neither the Tx or Rx queue should ever hold more than a few
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* characters.
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*
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*/
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/* Scheduler include files. */
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#include <stdlib.h>
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#include <string.h>
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#include "FreeRTOS.h"
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#include "task.h"
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/* Demo program include files. */
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#include "serial.h"
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#include "comtest_strings.h"
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#include "partest.h"
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#define comSTACK_SIZE configMINIMAL_STACK_SIZE
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#define comTX_LED_OFFSET ( 0 )
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#define comRX_LED_OFFSET ( 1 )
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#define comTOTAL_PERMISSIBLE_ERRORS ( 2 )
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/* The Tx task will transmit the sequence of characters at a pseudo random
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interval. This is the maximum and minimum block time between sends. */
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#define comTX_MAX_BLOCK_TIME ( ( portTickType ) 0x96 )
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#define comTX_MIN_BLOCK_TIME ( ( portTickType ) 0x32 )
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#define comOFFSET_TIME ( ( portTickType ) 3 )
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/* We should find that each character can be queued for Tx immediately and we
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don't have to block to send. */
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#define comNO_BLOCK ( ( portTickType ) 0 )
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/* The Rx task will block on the Rx queue for a long period. */
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#define comRX_BLOCK_TIME ( ( portTickType ) 0xffff )
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/* The string that is transmitted and received. */
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#define comTRANSACTED_STRING "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
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#define comBUFFER_LEN ( ( unsigned portBASE_TYPE ) ( comLAST_BYTE - comFIRST_BYTE ) + ( unsigned portBASE_TYPE ) 1 )
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#define comINITIAL_RX_COUNT_VALUE ( 0 )
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/* Handle to the com port used by both tasks. */
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static xComPortHandle xPort = NULL;
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/* The transmit task as described at the top of the file. */
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static void vComTxTask( void *pvParameters );
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/* The receive task as described at the top of the file. */
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static portTASK_FUNCTION_PROTO( vComRxTask, pvParameters );
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/* The LED that should be toggled by the Rx and Tx tasks. The Rx task will
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toggle LED ( uxBaseLED + comRX_LED_OFFSET). The Tx task will toggle LED
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( uxBaseLED + comTX_LED_OFFSET ). */
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static unsigned portBASE_TYPE uxBaseLED = 0;
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/* Check variable used to ensure no error have occurred. The Rx task will
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increment this variable after every successfully received sequence. If at any
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time the sequence is incorrect the the variable will stop being incremented. */
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static volatile unsigned portBASE_TYPE uxRxLoops = comINITIAL_RX_COUNT_VALUE;
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/*-----------------------------------------------------------*/
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void vStartComTestStringsTasks( unsigned portBASE_TYPE uxPriority, unsigned long ulBaudRate, unsigned portBASE_TYPE uxLED )
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{
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/* Initialise the com port then spawn the Rx and Tx tasks. */
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uxBaseLED = uxLED;
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xSerialPortInitMinimal( ulBaudRate, strlen( comTRANSACTED_STRING ) );
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/* The Tx task is spawned with a lower priority than the Rx task. */
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xTaskCreate( vComTxTask, ( signed char * ) "COMTx", comSTACK_SIZE, NULL, uxPriority - 1, ( xTaskHandle * ) NULL );
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xTaskCreate( vComRxTask, ( signed char * ) "COMRx", comSTACK_SIZE, NULL, uxPriority, ( xTaskHandle * ) NULL );
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}
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/*-----------------------------------------------------------*/
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static void vComTxTask( void * pvParameters )
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{
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portTickType xTimeToWait;
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size_t xStringLength;
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/* Just to stop compiler warnings. */
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( void ) pvParameters;
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xStringLength = strlen( comTRANSACTED_STRING );
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for( ;; )
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{
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/* Send the string. Setting the last parameter to pdTRUE ensures
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that vSerialPutString() will not return until the entire string has
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been sent to the UART. The UART interrupt is used to send more data
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to the UART as the UART FIFO empties, until the entire string has been
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sent. No CPU time is consumed by this task while it waits for the
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string to be sent to the UART. */
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vSerialPutString( xPort, ( const signed char * const ) comTRANSACTED_STRING, xStringLength );
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/* Toggle an LED to give a visible indication that another transmission
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has been performed. */
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vParTestToggleLED( uxBaseLED + comTX_LED_OFFSET );
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/* Wait a pseudo random time before sending the string again. */
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xTimeToWait = xTaskGetTickCount() + comOFFSET_TIME;
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/* Ensure the time to wait does not greater than comTX_MAX_BLOCK_TIME. */
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xTimeToWait %= comTX_MAX_BLOCK_TIME;
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/* Ensure the time to wait is not less than comTX_MIN_BLOCK_TIME. */
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if( xTimeToWait < comTX_MIN_BLOCK_TIME )
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{
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xTimeToWait = comTX_MIN_BLOCK_TIME;
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}
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vTaskDelay( xTimeToWait );
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}
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}
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/*-----------------------------------------------------------*/
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static void vComRxTask( void *pvParameters )
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{
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#if 0
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signed char cExpectedByte, cByteRxed;
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portBASE_TYPE xResyncRequired = pdFALSE, xErrorOccurred = pdFALSE;
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/* Just to stop compiler warnings. */
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( void ) pvParameters;
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for( ;; )
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{
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/* We expect to receive the characters from comFIRST_BYTE to
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comLAST_BYTE in an incrementing order. Loop to receive each byte. */
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for( cExpectedByte = comFIRST_BYTE; cExpectedByte <= comLAST_BYTE; cExpectedByte++ )
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{
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/* Block on the queue that contains received bytes until a byte is
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available. */
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if( xSerialGetChar( xPort, &cByteRxed, comRX_BLOCK_TIME ) )
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{
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/* Was this the byte we were expecting? If so, toggle the LED,
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otherwise we are out on sync and should break out of the loop
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until the expected character sequence is about to restart. */
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if( cByteRxed == cExpectedByte )
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{
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vParTestToggleLED( uxBaseLED + comRX_LED_OFFSET );
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}
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else
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{
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xResyncRequired = pdTRUE;
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break; /*lint !e960 Non-switch break allowed. */
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}
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}
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}
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/* Turn the LED off while we are not doing anything. */
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vParTestSetLED( uxBaseLED + comRX_LED_OFFSET, pdFALSE );
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/* Did we break out of the loop because the characters were received in
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an unexpected order? If so wait here until the character sequence is
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about to restart. */
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if( xResyncRequired == pdTRUE )
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{
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while( cByteRxed != comLAST_BYTE )
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{
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/* Block until the next char is available. */
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xSerialGetChar( xPort, &cByteRxed, comRX_BLOCK_TIME );
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}
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/* Note that an error occurred which caused us to have to resync.
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We use this to stop incrementing the loop counter so
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sAreComTestTasksStillRunning() will return false - indicating an
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error. */
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xErrorOccurred++;
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/* We have now resynced with the Tx task and can continue. */
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xResyncRequired = pdFALSE;
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}
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else
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{
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if( xErrorOccurred < comTOTAL_PERMISSIBLE_ERRORS )
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{
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/* Increment the count of successful loops. As error
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occurring (i.e. an unexpected character being received) will
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prevent this counter being incremented for the rest of the
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execution. Don't worry about mutual exclusion on this
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variable - it doesn't really matter as we just want it
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to change. */
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uxRxLoops++;
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}
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}
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}
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#else
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for( ;; )
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{
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vTaskDelay( 10000 );
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}
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#endif
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}
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/*-----------------------------------------------------------*/
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portBASE_TYPE xAreComTestTasksStillRunning( void )
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{
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portBASE_TYPE xReturn;
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/* If the count of successful reception loops has not changed than at
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some time an error occurred (i.e. a character was received out of sequence)
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and we will return false. */
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if( uxRxLoops == comINITIAL_RX_COUNT_VALUE )
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{
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xReturn = pdFALSE;
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}
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else
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{
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xReturn = pdTRUE;
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}
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/* Reset the count of successful Rx loops. When this function is called
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again we expect this to have been incremented. */
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uxRxLoops = comINITIAL_RX_COUNT_VALUE;
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return xReturn;
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}
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@ -0,0 +1,63 @@
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/*
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FreeRTOS V7.0.1 - Copyright (C) 2011 Real Time Engineers Ltd.
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||||
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||||
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***************************************************************************
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* *
|
||||
* 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!
|
||||
|
||||
http://www.FreeRTOS.org - Documentation, latest information, license and
|
||||
contact details.
|
||||
|
||||
http://www.SafeRTOS.com - A version that is certified for use in safety
|
||||
critical systems.
|
||||
|
||||
http://www.OpenRTOS.com - Commercial support, development, porting,
|
||||
licensing and training services.
|
||||
*/
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#ifndef COMTEST_H
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#define COMTEST_H
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void vAltStartComTestTasks( unsigned portBASE_TYPE uxPriority, unsigned long ulBaudRate, unsigned portBASE_TYPE uxLED );
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void vStartComTestTasks( unsigned portBASE_TYPE uxPriority, eCOMPort ePort, eBaud eBaudRate );
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portBASE_TYPE xAreComTestTasksStillRunning( void );
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void vComTestUnsuspendTask( void );
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#endif
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@ -0,0 +1,61 @@
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/*
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FreeRTOS V7.0.1 - Copyright (C) 2011 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!
|
||||
|
||||
http://www.FreeRTOS.org - Documentation, latest information, license and
|
||||
contact details.
|
||||
|
||||
http://www.SafeRTOS.com - A version that is certified for use in safety
|
||||
critical systems.
|
||||
|
||||
http://www.OpenRTOS.com - Commercial support, development, porting,
|
||||
licensing and training services.
|
||||
*/
|
||||
|
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#ifndef COMTEST_H
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#define COMTEST_H
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void vStartComTestStringsTasks( unsigned portBASE_TYPE uxPriority, unsigned long ulBaudRate, unsigned portBASE_TYPE uxLED );
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portBASE_TYPE xAreComTestTasksStillRunning( void );
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#endif
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@ -0,0 +1,124 @@
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/*
|
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FreeRTOS V7.0.1 - Copyright (C) 2011 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!
|
||||
|
||||
http://www.FreeRTOS.org - Documentation, latest information, license and
|
||||
contact details.
|
||||
|
||||
http://www.SafeRTOS.com - A version that is certified for use in safety
|
||||
critical systems.
|
||||
|
||||
http://www.OpenRTOS.com - Commercial support, development, porting,
|
||||
licensing and training services.
|
||||
*/
|
||||
|
||||
#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
|
||||
|
||||
@ -0,0 +1,241 @@
|
||||
/*
|
||||
FreeRTOS V7.0.1 - Copyright (C) 2011 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!
|
||||
|
||||
http://www.FreeRTOS.org - Documentation, latest information, license and
|
||||
contact details.
|
||||
|
||||
http://www.SafeRTOS.com - A version that is certified for use in safety
|
||||
critical systems.
|
||||
|
||||
http://www.OpenRTOS.com - Commercial support, development, porting,
|
||||
licensing and training services.
|
||||
*/
|
||||
|
||||
/*
|
||||
BASIC INTERRUPT DRIVEN SERIAL PORT DRIVER FOR UART0.
|
||||
|
||||
***Note*** This example uses queues to send each character into an interrupt
|
||||
service routine and out of an interrupt service routine individually. This
|
||||
is done to demonstrate queues being used in an interrupt, and to deliberately
|
||||
load the system to test the FreeRTOS port. It is *NOT* meant to be an
|
||||
example of an efficient implementation. An efficient implementation should
|
||||
use FIFOs or DMA if available, and only use FreeRTOS API functions when
|
||||
enough has been received to warrant a task being unblocked to process the
|
||||
data.
|
||||
*/
|
||||
|
||||
/* Scheduler includes. */
|
||||
#include "FreeRTOS.h"
|
||||
#include "queue.h"
|
||||
#include "semphr.h"
|
||||
#include "task.h" /*_RB_ remove this when the file is working. */
|
||||
#include "comtest_strings.h"
|
||||
|
||||
/* Library includes. */
|
||||
#include "xuartlite.h"
|
||||
#include "xuartlite_l.h"
|
||||
|
||||
/* Demo application includes. */
|
||||
#include "serial.h"
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/* Misc defines. */
|
||||
#define serINVALID_QUEUE ( ( xQueueHandle ) 0 )
|
||||
#define serNO_BLOCK ( ( portTickType ) 0 )
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/* The queue used to hold received characters. */
|
||||
static xQueueHandle xRxedChars;
|
||||
static xQueueHandle xCharsForTx;
|
||||
|
||||
static XUartLite xUartLiteInstance;
|
||||
|
||||
static void prvRxHandler( void *pvUnused, unsigned portBASE_TYPE uxByteCount );
|
||||
static void prvTxHandler( void *pvUnused, unsigned portBASE_TYPE uxByteCount );
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/*
|
||||
* See the serial2.h header file.
|
||||
*/
|
||||
xComPortHandle xSerialPortInitMinimal( unsigned long ulWantedBaud, unsigned portBASE_TYPE uxQueueLength )
|
||||
{
|
||||
portBASE_TYPE xStatus;
|
||||
|
||||
/* Create the queues used to hold Rx/Tx characters. */
|
||||
xRxedChars = xQueueCreate( uxQueueLength, ( unsigned portBASE_TYPE ) sizeof( signed char ) );
|
||||
xCharsForTx = xQueueCreate( uxQueueLength + 1, ( unsigned portBASE_TYPE ) sizeof( signed char ) );
|
||||
|
||||
/* If the queues were created correctly then setup the serial port
|
||||
hardware. */
|
||||
if( ( xRxedChars != serINVALID_QUEUE ) && ( xCharsForTx != serINVALID_QUEUE ) )
|
||||
{
|
||||
xStatus = XUartLite_Initialize( &xUartLiteInstance, XPAR_UARTLITE_1_DEVICE_ID );
|
||||
|
||||
if( xStatus == XST_SUCCESS )
|
||||
{
|
||||
XUartLite_ResetFifos( &xUartLiteInstance );
|
||||
XUartLite_SetRecvHandler( &xUartLiteInstance, ( XUartLite_Handler ) prvRxHandler, NULL );
|
||||
XUartLite_SetSendHandler( &xUartLiteInstance, ( XUartLite_Handler ) prvTxHandler, NULL );
|
||||
xStatus = xPortInstallInterruptHandler( XPAR_INTC_0_UARTLITE_1_VEC_ID, ( XInterruptHandler ) XUartLite_InterruptHandler, &xUartLiteInstance );
|
||||
XUartLite_EnableIntr( xUartLiteInstance.RegBaseAddress );
|
||||
vPortEnableInterrupt( XPAR_INTC_0_UARTLITE_1_VEC_ID );
|
||||
}
|
||||
|
||||
configASSERT( xStatus == pdPASS );
|
||||
}
|
||||
|
||||
/* This demo file only supports a single port but something must be
|
||||
returned to comply with the standard demo header file. */
|
||||
return ( xComPortHandle ) 0;
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
portBASE_TYPE xSerialGetChar( xComPortHandle pxPort, signed char *pcRxedChar, portTickType xBlockTime )
|
||||
{
|
||||
extern u8 XUartLite_RecvByte(u32 BaseAddress);
|
||||
|
||||
// *pcRxedChar = XUartLite_RecvByte( xUartLiteInstance.RegBaseAddress );
|
||||
|
||||
vTaskDelay( 1000 );
|
||||
return pdTRUE;
|
||||
#if 0
|
||||
/* The port handle is not required as this driver only supports one port. */
|
||||
( void ) pxPort;
|
||||
|
||||
/* Get the next character from the buffer. Return false if no characters
|
||||
are available, or arrive before xBlockTime expires. */
|
||||
if( xQueueReceive( xRxedChars, pcRxedChar, xBlockTime ) )
|
||||
{
|
||||
return pdTRUE;
|
||||
}
|
||||
else
|
||||
{
|
||||
return pdFALSE;
|
||||
}
|
||||
#endif
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
void vSerialPutString( xComPortHandle pxPort, const signed char * const pcString, unsigned short usStringLength )
|
||||
{
|
||||
XUartLite_Send( &xUartLiteInstance, ( unsigned char * ) pcString, ( unsigned portBASE_TYPE ) usStringLength );
|
||||
|
||||
#if 0
|
||||
unsigned portBASE_TYPE uxReturn = 0U;
|
||||
|
||||
char *pc = pc;
|
||||
extern void XUartLite_SendByte(u32 BaseAddress, u8 Data);
|
||||
|
||||
/* Just to avoid compiler warnings. */
|
||||
( void ) pxPort;
|
||||
|
||||
while( uxReturn != usStringLength )
|
||||
{
|
||||
XUartLite_SendByte( xUartLiteInstance.RegBaseAddress, *pc );
|
||||
pc++;
|
||||
uxReturn++;
|
||||
// uxReturn += XUartLite_Send( &xUartLiteInstance, ( unsigned char * ) pcString, ( ( unsigned portBASE_TYPE ) usStringLength ) - uxReturn );
|
||||
while( XUartLite_IsSending( &xUartLiteInstance ) != pdFALSE )
|
||||
{
|
||||
/*_RB_ This function is not yet written to make use of the RTOS. */
|
||||
}
|
||||
}
|
||||
#endif
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
signed portBASE_TYPE xSerialPutChar( xComPortHandle pxPort, signed char cOutChar, portTickType xBlockTime )
|
||||
{
|
||||
#if 1
|
||||
extern void XUartLite_SendByte(u32 BaseAddress, u8 Data);
|
||||
|
||||
// for( ;; )
|
||||
// {
|
||||
XUartLite_SendByte( xUartLiteInstance.RegBaseAddress, cOutChar );
|
||||
// }
|
||||
// vTaskDelay( 2 );
|
||||
return 1;
|
||||
#else
|
||||
signed portBASE_TYPE xReturn;
|
||||
|
||||
if( xQueueSend( xCharsForTx, &cOutChar, xBlockTime ) == pdPASS )
|
||||
{
|
||||
xReturn = pdPASS;
|
||||
|
||||
/* Enable the UART Tx interrupt. */
|
||||
XUartLite_EnableIntr( xUartLiteInstance.RegBaseAddress );
|
||||
}
|
||||
else
|
||||
{
|
||||
xReturn = pdFAIL;
|
||||
}
|
||||
|
||||
return xReturn;
|
||||
#endif
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
void vSerialClose( xComPortHandle xPort )
|
||||
{
|
||||
/* Not supported as not required by the demo application. */
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
static void prvRxHandler( void *pvUnused, unsigned portBASE_TYPE uxByteCount )
|
||||
{
|
||||
portNOP();
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
static void prvTxHandler( void *pvUnused, unsigned portBASE_TYPE uxByteCount )
|
||||
{
|
||||
portNOP();
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
Loading…
Reference in New Issue