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FreeRTOS V8.0.1 - Copyright (C) 2014 Real Time Engineers Ltd.
All rights reserved
* *
* FreeRTOS provides completely free yet professionally developed, *
* robust, strictly quality controlled, supported, and cross *
* platform software that has become a de facto standard. *
* *
* Help yourself get started quickly and support the FreeRTOS *
* project by purchasing a FreeRTOS tutorial book, reference *
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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. Full license text is available from the following
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* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong?" *
* *
* *
* *
*************************************************************************** - Documentation, books, training, latest versions,
license and Real Time Engineers Ltd. contact details. - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool, a DOS
compatible FAT file system, and our tiny thread aware UDP/IP stack. - Real Time Engineers ltd license FreeRTOS to High
Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS
licenses offer ticketed support, indemnification and middleware. - High Integrity Systems also provide a safety
engineered and independently SIL3 certified version for use in safety and
mission critical applications that require provable dependability.
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* NOTE 1: This project provides two demo applications. A low power tickless
* project, and a more comprehensive test and demo application. The
* configCREATE_LOW_POWER_DEMO setting in FreeRTOSConfig.h is used to
* select between the two. See the notes on using
* configCREATE_LOW_POWER_DEMO in FreeRTOSConfig.h. This file implements
* the comprehensive test and demo version.
* NOTE 2: This file only contains the source code that is specific to the
* full demo. Generic functions, such FreeRTOS hook functions, and functions
* required to configure the hardware, are defined in main.c.
* main_full() creates all the demo application tasks and a software timer, then
* starts the scheduler. The web documentation provides more details of the
* standard demo application tasks, which provide no particular functionality,
* but do provide a good example of how to use the FreeRTOS API.
* In addition to the standard demo tasks, the following tasks and tests are
* defined and/or created within this file:
* "Check" timer - The check software timer period is initially set to three
* seconds. The callback function associated with the check software timer
* checks that all the standard demo tasks are not only still executing, but
* are executing without reporting any errors. If the check software timer
* discovers that a task has either stalled, or reported an error, then it
* changes its own execution period from the initial three seconds, to just
* 200ms. The check software timer callback function also toggles an LED each
* time it is called. This provides a visual indication of the system status:
* If the LED toggles every three seconds, then no issues have been discovered.
* If the LED toggles every 200ms, then an issue has been discovered with at
* least one task.
* See the documentation page for this demo on the web site for
* full information, including hardware setup requirements.
/* Standard includes. */
#include <stdio.h>
/* Kernel includes. */
#include "FreeRTOS.h"
#include "task.h"
#include "timers.h"
#include "semphr.h"
/* Standard demo application includes. */
#include "PollQ.h"
#include "semtest.h"
#include "dynamic.h"
#include "BlockQ.h"
#include "blocktim.h"
#include "countsem.h"
#include "GenQTest.h"
#include "recmutex.h"
/* ST library functions. */
#include "stm32l1xx.h"
#include "discover_board.h"
#include "stm32l_discovery_lcd.h"
/* Priorities for the demo application tasks. */
/* A block time of zero simply means "don't block". */
#define mainDONT_BLOCK ( 0UL )
/* The period after which the check timer will expire providing no errors
have been reported by any of the standard demo tasks. ms are converted to the
equivalent in ticks using the portTICK_PERIOD_MS constant. */
#define mainCHECK_TIMER_PERIOD_MS ( 3000UL / portTICK_PERIOD_MS )
/* The period at which the check timer will expire, in ms, if an error has been
reported in one of the standard demo tasks. ms are converted to the equivalent
in ticks using the portTICK_PERIOD_MS constant. */
* The check timer callback function, as described at the top of this file.
static void prvCheckTimerCallback( TimerHandle_t xTimer );
* Configure the LCD, then write welcome message.
static void prvConfigureLCD( void );
void main_full( void )
TimerHandle_t xCheckTimer = NULL;
/* The LCD is only used in the Full demo. */
/* Start all the other standard demo/test tasks. They have not particular
functionality, but do demonstrate how to use the FreeRTOS API and test the
kernel port. */
vStartBlockingQueueTasks( mainBLOCK_Q_PRIORITY );
vStartGenericQueueTasks( tskIDLE_PRIORITY );
vStartPolledQueueTasks( mainQUEUE_POLL_PRIORITY );
vStartSemaphoreTasks( mainSEM_TEST_PRIORITY );
/* Create the software timer that performs the 'check' functionality,
as described at the top of this file. */
xCheckTimer = xTimerCreate( "CheckTimer", /* A text name, purely to help debugging. */
( mainCHECK_TIMER_PERIOD_MS ), /* The timer period, in this case 3000ms (3s). */
pdTRUE, /* This is an auto-reload timer, so xAutoReload is set to pdTRUE. */
( void * ) 0, /* The ID is not used, so can be set to anything. */
prvCheckTimerCallback /* The callback function that inspects the status of all the other tasks. */
if( xCheckTimer != NULL )
xTimerStart( xCheckTimer, mainDONT_BLOCK );
/* Start the scheduler. */
/* If all is well, the scheduler will now be running, and the following line
will never be reached. If the following line does execute, then there was
insufficient FreeRTOS heap memory available for the idle and/or timer tasks
to be created. See the memory management section on the FreeRTOS web site
for more details. */
for( ;; );
static void prvCheckTimerCallback( TimerHandle_t xTimer )
static long lChangedTimerPeriodAlready = pdFALSE;
unsigned long ulErrorFound = pdFALSE;
/* Check all the demo tasks to ensure they are all still running, and that
none have detected an error. */
if( xAreDynamicPriorityTasksStillRunning() != pdTRUE )
ulErrorFound = pdTRUE;
if( xAreBlockingQueuesStillRunning() != pdTRUE )
ulErrorFound = pdTRUE;
if ( xAreBlockTimeTestTasksStillRunning() != pdTRUE )
ulErrorFound = pdTRUE;
if ( xAreGenericQueueTasksStillRunning() != pdTRUE )
ulErrorFound = pdTRUE;
if ( xAreRecursiveMutexTasksStillRunning() != pdTRUE )
ulErrorFound = pdTRUE;
if( xArePollingQueuesStillRunning() != pdTRUE )
ulErrorFound = pdTRUE;
if( xAreSemaphoreTasksStillRunning() != pdTRUE )
ulErrorFound = pdTRUE;
/* Toggle the check LED to give an indication of the system status. If
the LED toggles every mainCHECK_TIMER_PERIOD_MS milliseconds then
everything is ok. A faster toggle indicates an error. */
/* Have any errors been latch in ulErrorFound? If so, shorten the
period of the check timer to mainERROR_CHECK_TIMER_PERIOD_MS milliseconds.
This will result in an increase in the rate at which mainCHECK_LED
toggles. */
if( ulErrorFound != pdFALSE )
if( lChangedTimerPeriodAlready == pdFALSE )
lChangedTimerPeriodAlready = pdTRUE;
/* This call to xTimerChangePeriod() uses a zero block time.
Functions called from inside of a timer callback function must
*never* attempt to block. */
xTimerChangePeriod( xTimer, ( mainERROR_CHECK_TIMER_PERIOD_MS ), mainDONT_BLOCK );
static void prvConfigureLCD( void )
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable necessary clocks. */
RCC_APB1PeriphClockCmd( RCC_APB1Periph_LCD, ENABLE );
/* Configure Port A LCD Output pins as alternate function. */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_8 | GPIO_Pin_9 |GPIO_Pin_10 |GPIO_Pin_15;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_Init( GPIOA, &GPIO_InitStructure );
/* Select LCD alternate function for Port A LCD Output pins. */
GPIO_PinAFConfig( GPIOA, GPIO_PinSource1, GPIO_AF_LCD );
GPIO_PinAFConfig( GPIOA, GPIO_PinSource2, GPIO_AF_LCD );
GPIO_PinAFConfig( GPIOA, GPIO_PinSource3, GPIO_AF_LCD );
GPIO_PinAFConfig( GPIOA, GPIO_PinSource8, GPIO_AF_LCD );
GPIO_PinAFConfig( GPIOA, GPIO_PinSource9, GPIO_AF_LCD );
GPIO_PinAFConfig( GPIOA, GPIO_PinSource10, GPIO_AF_LCD );
GPIO_PinAFConfig( GPIOA, GPIO_PinSource15, GPIO_AF_LCD );
/* Configure Port B LCD Output pins as alternate function */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_Init( GPIOB, &GPIO_InitStructure );
/* Select LCD alternate function for Port B LCD Output pins */
GPIO_PinAFConfig( GPIOB, GPIO_PinSource3, GPIO_AF_LCD );
GPIO_PinAFConfig( GPIOB, GPIO_PinSource4, GPIO_AF_LCD );
GPIO_PinAFConfig( GPIOB, GPIO_PinSource5, GPIO_AF_LCD );
GPIO_PinAFConfig( GPIOB, GPIO_PinSource8, GPIO_AF_LCD );
GPIO_PinAFConfig( GPIOB, GPIO_PinSource9, GPIO_AF_LCD );
GPIO_PinAFConfig( GPIOB, GPIO_PinSource10, GPIO_AF_LCD );
GPIO_PinAFConfig( GPIOB, GPIO_PinSource11, GPIO_AF_LCD );
GPIO_PinAFConfig( GPIOB, GPIO_PinSource12, GPIO_AF_LCD );
GPIO_PinAFConfig( GPIOB, GPIO_PinSource13, GPIO_AF_LCD );
GPIO_PinAFConfig( GPIOB, GPIO_PinSource14, GPIO_AF_LCD );
GPIO_PinAFConfig( GPIOB, GPIO_PinSource15, GPIO_AF_LCD );
/* Configure Port C LCD Output pins as alternate function */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 |GPIO_Pin_11 ;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_Init( GPIOC, &GPIO_InitStructure );
/* Select LCD alternate function for Port B LCD Output pins */
GPIO_PinAFConfig( GPIOC, GPIO_PinSource0, GPIO_AF_LCD );
GPIO_PinAFConfig( GPIOC, GPIO_PinSource1, GPIO_AF_LCD );
GPIO_PinAFConfig( GPIOC, GPIO_PinSource2, GPIO_AF_LCD );
GPIO_PinAFConfig( GPIOC, GPIO_PinSource3, GPIO_AF_LCD );
GPIO_PinAFConfig( GPIOC, GPIO_PinSource6, GPIO_AF_LCD );
GPIO_PinAFConfig( GPIOC, GPIO_PinSource7, GPIO_AF_LCD );
GPIO_PinAFConfig( GPIOC, GPIO_PinSource8, GPIO_AF_LCD );
GPIO_PinAFConfig( GPIOC, GPIO_PinSource9, GPIO_AF_LCD );
GPIO_PinAFConfig( GPIOC, GPIO_PinSource10, GPIO_AF_LCD );
GPIO_PinAFConfig( GPIOC, GPIO_PinSource11, GPIO_AF_LCD );
LCD_GLASS_DisplayString( "F'RTOS" );