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Add in a basic USART driver and echo test task.
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Richard Barry
parent
4ab0313273
commit
28b5ea32a4
10 changed files with 269 additions and 425 deletions
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@ -61,27 +61,28 @@
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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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* "Check" task - This only executes every five seconds but has the highest
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* "Check" task - This only executes every five seconds but has the highest
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* priority so is guaranteed to get processor time. Its main function is to
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* check that all the standard demo tasks are still operational. The check task
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* will toggle LED 7 (PB15) every five seconds so long as no errors have been
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* will toggle LED 3 (PB11) every five seconds so long as no errors have been
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* detected. The toggle rate will increase to half a second if an error has
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* been found in any task.
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*
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* "Echo" task - This is a very basic task that simply echoes any characters
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* received on COM0 (USART1). This can be tested by transmitting a text file
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* from a dumb terminal to the STM32 USART.
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*/
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/* Standard includes. */
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#include <stdio.h>
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#include <string.h>
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/* Scheduler includes. */
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#include "FreeRTOS.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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/* Library includes. */
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#include "stm32f10x_it.h"
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#include "stm32f10x_tim.h"
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/* Demo app includes. */
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#include "BlockQ.h"
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@ -93,6 +94,9 @@
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#include "QPeek.h"
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#include "recmutex.h"
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/* Driver includes. */
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#include "STM32_USART.h"
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/* The time between cycles of the 'check' task - which depends on whether the
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check task has detected an error or not. */
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@ -107,9 +111,14 @@ check task has detected an error or not. */
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#define mainBLOCK_Q_PRIORITY ( tskIDLE_PRIORITY + 2 )
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#define mainCHECK_TASK_PRIORITY ( tskIDLE_PRIORITY + 3 )
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#define mainFLASH_TASK_PRIORITY ( tskIDLE_PRIORITY + 2 )
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#define mainECHO_TASK_PRIORITY ( tskIDLE_PRIORITY + 1 )
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#define mainINTEGER_TASK_PRIORITY ( tskIDLE_PRIORITY )
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#define mainGEN_QUEUE_TASK_PRIORITY ( tskIDLE_PRIORITY )
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/* COM port and baud rate used by the echo task. */
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#define mainCOM0 ( 0 )
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#define mainBAUD_RATE ( 115200 )
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/*-----------------------------------------------------------*/
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/*
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@ -120,6 +129,10 @@ static void prvSetupHardware( void );
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/* The 'check' task as described at the top of this file. */
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static void prvCheckTask( void *pvParameters );
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/* A simple task that echoes all the characters that are received on COM0
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(USART1). */
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static void prvUSARTEchoTask( void *pvParameters );
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/*-----------------------------------------------------------*/
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int main( void )
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@ -141,7 +154,10 @@ int main( void )
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vStartQueuePeekTasks();
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vStartRecursiveMutexTasks();
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/* Create the 'check' task, which is defined within this file. */
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/* Create the 'echo' task, which is also defined within this file. */
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xTaskCreate( prvUSARTEchoTask, ( signed char * ) "Echo", configMINIMAL_STACK_SIZE, NULL, mainECHO_TASK_PRIORITY, NULL );
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/* Create the 'check' task, which is also defined within this file. */
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xTaskCreate( prvCheckTask, ( signed char * ) "Check", configMINIMAL_STACK_SIZE, NULL, mainCHECK_TASK_PRIORITY, NULL );
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/* Start the scheduler. */
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@ -153,6 +169,7 @@ int main( void )
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}
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/*-----------------------------------------------------------*/
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/* Described at the top of this file. */
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static void prvCheckTask( void *pvParameters )
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{
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portTickType xLastExecutionTime;
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@ -204,6 +221,49 @@ unsigned long ulTicksToWait = mainCHECK_DELAY_NO_ERROR;
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}
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/*-----------------------------------------------------------*/
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/* Described at the top of this file. */
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static void prvUSARTEchoTask( void *pvParameters )
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{
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signed char cChar;
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/* String declared static to ensure it does not end up on the stack, no matter
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what the optimisation level. */
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static const char *pcLongishString =
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"ABBA was a Swedish pop music group formed in Stockholm in 1972, consisting of Anni-Frid Frida Lyngstad, "
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"Björn Ulvaeus, Benny Andersson and Agnetha Fältskog. Throughout the band's existence, Fältskog and Ulvaeus "
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"were a married couple, as were Lyngstad and Andersson - although both couples later divorced. They became one "
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"of the most commercially successful acts in the history of popular music, and they topped the charts worldwide "
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"from 1972 to 1983. ABBA gained international popularity employing catchy song hooks, simple lyrics, sound "
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"effects (reverb, phasing) and a Wall of Sound achieved by overdubbing the female singers' voices in multiple "
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"harmonies. As their popularity grew, they were sought after to tour Europe, Australia, and North America, drawing "
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"crowds of ardent fans, notably in Australia. Touring became a contentious issue, being particularly cumbersome for "
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"Fältskog, but they continued to release studio albums to widespread commercial success. At the height of their "
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"popularity, however, both relationships began suffering strain that led ultimately to the collapse of first the "
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"Ulvaeus-Fältskog marriage (in 1979) and then of the Andersson-Lyngstad marriage in 1981. In the late 1970s and early "
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"1980s these relationship changes began manifesting in the group's music, as they produced more thoughtful, "
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"introspective lyrics with different compositions.";
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/* Just to avoid compiler warnings. */
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( void ) pvParameters;
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/* Initialise COM0, which is USART1 according to the STM32 libraries. */
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lCOMPortInit( mainCOM0, mainBAUD_RATE );
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/* Try sending out a string all in one go, as a very basic test of the
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lSerialPutString() function. */
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lSerialPutString( mainCOM0, pcLongishString, strlen( pcLongishString ) );
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for( ;; )
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{
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/* Block to wait for a character to be received on COM0. */
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xSerialGetChar( mainCOM0, &cChar, portMAX_DELAY );
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/* Write the received character back to COM0. */
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xSerialPutChar( mainCOM0, cChar, 0 );
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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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/* RCC system reset(for debug purpose). */
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@ -262,9 +322,6 @@ static void prvSetupHardware( void )
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/* SPI2 Periph clock enable */
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RCC_APB1PeriphClockCmd( RCC_APB1Periph_SPI2, ENABLE );
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/* Initialize the SPI FLASH driver */
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SPI_FLASH_Init();
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}
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/*-----------------------------------------------------------*/
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