/* | |
FreeRTOS V8.0.1 - Copyright (C) 2014 Real Time Engineers Ltd. | |
All rights reserved | |
VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION. | |
*************************************************************************** | |
* * | |
* 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 * | |
* manual, or both from: http://www.FreeRTOS.org/Documentation * | |
* * | |
* Thank you! * | |
* * | |
*************************************************************************** | |
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 !<< | |
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>>! outside of the FreeRTOS kernel. !<< | |
FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY | |
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FOR A PARTICULAR PURPOSE. Full license text is available from the following | |
link: http://www.freertos.org/a00114.html | |
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*************************************************************************** | |
* * | |
* Having a problem? Start by reading the FAQ "My application does * | |
* not run, what could be wrong?" * | |
* * | |
* http://www.FreeRTOS.org/FAQHelp.html * | |
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*************************************************************************** | |
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license and Real Time Engineers Ltd. contact details. | |
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*/ | |
/* | |
* main-blinky.c is included when the "Blinky" build configuration is used. | |
* main-full.c is included when the "Full" build configuration is used. | |
* | |
* main-full.c (this file) defines a comprehensive demo that creates many | |
* tasks, queues, semaphores and timers. It also demonstrates how Cortex-M3 | |
* interrupts can interact with FreeRTOS tasks/timers. | |
* | |
* This demo project runs on the SK-FM3-64PMC1 evaluation board, which is | |
* populated with an MB9A300 microcontroller. | |
* | |
* The main() Function: | |
* main() creates three demo specific software timers, one demo specific queue, | |
* and two demo specific tasks. It then creates a whole host of 'standard | |
* demo' tasks/queues/semaphores, before starting the scheduler. The demo | |
* specific tasks and timers are described in the comments here. The standard | |
* demo tasks are described on the FreeRTOS.org web site. | |
* | |
* The standard demo tasks provide no specific functionality. They are | |
* included to both test the FreeRTOS port, and provide examples of how the | |
* various FreeRTOS API functions can be used. | |
* | |
* This demo creates 43 tasks in total. If you want a simpler demo, use the | |
* Blinky build configuration. | |
* | |
* The Demo Specific Queue Send Task: | |
* The queue send task is implemented by the prvQueueSendTask() function in | |
* this file. prvQueueSendTask() sits in a loop that causes it to repeatedly | |
* block for 200 milliseconds, before sending the value 100 to the queue that | |
* was created within main(). Once the value is sent, the task loops back | |
* around to block for another 200 milliseconds. | |
* | |
* The Demo Specific Queue Receive Task: | |
* The queue receive task is implemented by the prvQueueReceiveTask() function | |
* in this file. prvQueueReceiveTask() sits in a loop that causes it to | |
* repeatedly attempt to read data from the queue that was created within | |
* main(). When data is received, the task checks the value of the data, and | |
* if the value equals the expected 100, toggles an LED in the 7 segment display | |
* (see the documentation page for this demo on the FreeRTOS.org site to see | |
* which LED is used). The 'block time' parameter passed to the queue receive | |
* function specifies that the task should be held in the Blocked state | |
* indefinitely to wait for data to be available on the queue. The queue | |
* receive task will only leave the Blocked state when the queue send task | |
* writes to the queue. As the queue send task writes to the queue every 200 | |
* milliseconds, the queue receive task leaves the Blocked state every 200 | |
* milliseconds, and therefore toggles the LED every 200 milliseconds. | |
* | |
* The Demo Specific LED Software Timer and the Button Interrupt: | |
* The user button SW2 is configured to generate an interrupt each time it is | |
* pressed. The interrupt service routine switches an LED on, and resets the | |
* LED software timer. The LED timer has a 5000 millisecond (5 second) period, | |
* and uses a callback function that is defined to just turn the LED off again. | |
* Therefore, pressing the user button will turn the LED on, and the LED will | |
* remain on until a full five seconds pass without the button being pressed. | |
* See the documentation page for this demo on the FreeRTOS.org web site to see | |
* which LED is used. | |
* | |
* The Demo Specific "Check" Callback Function: | |
* This is called each time the 'check' timer expires. The check timer | |
* callback function inspects all the standard demo tasks to see if they are | |
* all executing as expected. The check timer is initially configured to | |
* expire every three seconds, but will shorted this to every 500ms if an error | |
* is ever discovered. The check timer callback toggles the LED defined by | |
* the mainCHECK_LED definition each time it executes. Therefore, if LED | |
* mainCHECK_LED is toggling every three seconds, then no error have been found. | |
* If LED mainCHECK_LED is toggling every 500ms, then at least one errors has | |
* been found. The variable pcStatusMessage is set to a string that indicates | |
* which task reported an error. See the documentation page for this demo on | |
* the FreeRTOS.org web site to see which LED in the 7 segment display is used. | |
* | |
* The Demo Specific "Digit Counter" Callback Function: | |
* This is called each time the 'digit counter' timer expires. It causes the | |
* digits 0 to 9 to be displayed in turn as the first character of the two | |
* character display. The LEDs in the other digit of the two character | |
* display are used as general purpose LEDs, as described in this comment block. | |
* | |
* The Demo Specific Idle Hook Function: | |
* The idle hook function demonstrates how to query the amount of FreeRTOS heap | |
* space that is remaining (see vApplicationIdleHook() defined in this file). | |
* | |
* The Demo Specific Tick Hook Function: | |
* The tick hook function is used to test the interrupt safe software timer | |
* functionality. | |
*/ | |
/* Kernel includes. */ | |
#include "FreeRTOS.h" | |
#include "task.h" | |
#include "queue.h" | |
#include "timers.h" | |
/* Fujitsu drivers/libraries. */ | |
#include "mcu.h" | |
/* Common demo includes. */ | |
#include "partest.h" | |
#include "flash.h" | |
#include "BlockQ.h" | |
#include "death.h" | |
#include "blocktim.h" | |
#include "semtest.h" | |
#include "GenQTest.h" | |
#include "QPeek.h" | |
#include "recmutex.h" | |
#include "TimerDemo.h" | |
#include "comtest2.h" | |
#include "PollQ.h" | |
#include "countsem.h" | |
#include "dynamic.h" | |
/* The rate at which data is sent to the queue, specified in milliseconds, and | |
converted to ticks using the portTICK_PERIOD_MS constant. */ | |
#define mainQUEUE_SEND_FREQUENCY_MS ( 200 / portTICK_PERIOD_MS ) | |
/* The number of items the queue can hold. This is 1 as the receive task | |
will remove items as they are added, meaning the send task should always find | |
the queue empty. */ | |
#define mainQUEUE_LENGTH ( 1 ) | |
/* The LED toggled by the check timer callback function. This is an LED in the | |
second digit of the two digit 7 segment display. See the documentation page | |
for this demo on the FreeRTOS.org web site to see which LED this relates to. */ | |
#define mainCHECK_LED ( 1UL << 3UL ) | |
/* The LED toggle by the queue receive task. This is an LED in the second digit | |
of the two digit 7 segment display. See the documentation page for this demo on | |
the FreeRTOS.org web site to see which LED this relates to. */ | |
#define mainTASK_CONTROLLED_LED 0x07UL | |
/* The LED turned on by the button interrupt, and turned off by the LED timer. | |
This is an LED in the second digit of the two digit 7 segment display. See the | |
documentation page for this demo on the FreeRTOS.org web site to see which LED | |
this relates to. */ | |
#define mainTIMER_CONTROLLED_LED 0x05UL | |
/* The LED used by the comtest tasks. See the comtest.c file for more | |
information. The LEDs used by the comtest task are in the second digit of the | |
two digit 7 segment display. See the documentation page for this demo on the | |
FreeRTOS.org web site to see which LEDs this relates to. */ | |
#define mainCOM_TEST_LED 0x03UL | |
/* Constant used by the standard timer test functions. */ | |
#define mainTIMER_TEST_PERIOD ( 50 ) | |
/* Priorities used by the various different standard demo tasks. */ | |
#define mainCHECK_TASK_PRIORITY ( configMAX_PRIORITIES - 1 ) | |
#define mainQUEUE_POLL_PRIORITY ( tskIDLE_PRIORITY + 1 ) | |
#define mainSEM_TEST_PRIORITY ( tskIDLE_PRIORITY + 1 ) | |
#define mainBLOCK_Q_PRIORITY ( tskIDLE_PRIORITY + 2 ) | |
#define mainCREATOR_TASK_PRIORITY ( tskIDLE_PRIORITY + 3 ) | |
#define mainFLASH_TASK_PRIORITY ( tskIDLE_PRIORITY + 1 ) | |
#define mainINTEGER_TASK_PRIORITY ( tskIDLE_PRIORITY ) | |
#define mainGEN_QUEUE_TASK_PRIORITY ( tskIDLE_PRIORITY ) | |
#define mainCOM_TEST_PRIORITY ( tskIDLE_PRIORITY + 2 ) | |
/* Priorities defined in this main-full.c file. */ | |
#define mainQUEUE_RECEIVE_TASK_PRIORITY ( tskIDLE_PRIORITY + 2 ) | |
#define mainQUEUE_SEND_TASK_PRIORITY ( tskIDLE_PRIORITY + 1 ) | |
/* The period at which the check timer will expire, in ms, provided 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. */ | |
#define mainERROR_CHECK_TIMER_PERIOD_MS ( 500UL / portTICK_PERIOD_MS ) | |
/* The period at which the digit counter timer will expire, in ms, and converted | |
to ticks using the portTICK_PERIOD_MS constant. */ | |
#define mainDIGIT_COUNTER_TIMER_PERIOD_MS ( 250UL / portTICK_PERIOD_MS ) | |
/* The LED will remain on until the button has not been pushed for a full | |
5000ms. */ | |
#define mainLED_TIMER_PERIOD_MS ( 5000UL / portTICK_PERIOD_MS ) | |
/* A zero block time. */ | |
#define mainDONT_BLOCK ( 0UL ) | |
/* Baud rate used by the comtest tasks. */ | |
#define mainCOM_TEST_BAUD_RATE ( 115200UL ) | |
/*-----------------------------------------------------------*/ | |
/* | |
* Setup the NVIC, LED outputs, and button inputs. | |
*/ | |
static void prvSetupHardware( void ); | |
/* | |
* The application specific (not common demo) tasks as described in the comments | |
* at the top of this file. | |
*/ | |
static void prvQueueReceiveTask( void *pvParameters ); | |
static void prvQueueSendTask( void *pvParameters ); | |
/* | |
* The LED timer callback function. This does nothing but switch an LED off. | |
*/ | |
static void prvLEDTimerCallback( TimerHandle_t xTimer ); | |
/* | |
* The check timer callback function, as described at the top of this file. | |
*/ | |
static void prvCheckTimerCallback( TimerHandle_t xTimer ); | |
/* | |
* The digit counter callback function, as described at the top of this file. | |
*/ | |
static void prvDigitCounterTimerCallback( TimerHandle_t xTimer ); | |
/* | |
* This is not a 'standard' partest function, so the prototype is not in | |
* partest.h, and is instead included here. | |
*/ | |
void vParTestSetLEDFromISR( unsigned portBASE_TYPE uxLED, signed portBASE_TYPE xValue ); | |
/*-----------------------------------------------------------*/ | |
/* The queue used by both application specific demo tasks defined in this file. */ | |
static QueueHandle_t xQueue = NULL; | |
/* The LED software timer. This uses prvLEDTimerCallback() as it's callback | |
function. */ | |
static TimerHandle_t xLEDTimer = NULL; | |
/* The digit counter software timer. This displays a counting digit on one half | |
of the seven segment displays. */ | |
static TimerHandle_t xDigitCounterTimer = NULL; | |
/* The check timer. This uses prvCheckTimerCallback() as its callback | |
function. */ | |
static TimerHandle_t xCheckTimer = NULL; | |
/* If an error is detected in a standard demo task, then pcStatusMessage will | |
be set to point to a string that identifies the offending task. This is just | |
to make debugging easier. */ | |
static const char *pcStatusMessage = NULL; | |
/*-----------------------------------------------------------*/ | |
int main(void) | |
{ | |
/* Configure the NVIC, LED outputs and button inputs. */ | |
prvSetupHardware(); | |
/* Create the queue. */ | |
xQueue = xQueueCreate( mainQUEUE_LENGTH, sizeof( unsigned long ) ); | |
if( xQueue != NULL ) | |
{ | |
/* Start the two application specific demo tasks, as described in the | |
comments at the top of this file. */ | |
xTaskCreate( prvQueueReceiveTask, "Rx", configMINIMAL_STACK_SIZE, NULL, mainQUEUE_RECEIVE_TASK_PRIORITY, NULL ); | |
xTaskCreate( prvQueueSendTask, "TX", configMINIMAL_STACK_SIZE, NULL, mainQUEUE_SEND_TASK_PRIORITY, NULL ); | |
/* Create the software timer that is responsible for turning off the LED | |
if the button is not pushed within 5000ms, as described at the top of | |
this file. */ | |
xLEDTimer = xTimerCreate( "LEDTimer", /* A text name, purely to help debugging. */ | |
( mainLED_TIMER_PERIOD_MS ),/* The timer period, in this case 5000ms (5s). */ | |
pdFALSE, /* This is a one shot timer, so xAutoReload is set to pdFALSE. */ | |
( void * ) 0, /* The ID is not used, so can be set to anything. */ | |
prvLEDTimerCallback /* The callback function that switches the LED off. */ | |
); | |
/* 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. */ | |
); | |
/* Create the software timer that performs the 'digit counting' | |
functionality, as described at the top of this file. */ | |
xDigitCounterTimer = xTimerCreate( "DigitCounter", /* A text name, purely to help debugging. */ | |
( mainDIGIT_COUNTER_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. */ | |
prvDigitCounterTimerCallback /* The callback function that inspects the status of all the other tasks. */ | |
); | |
/* Create a lot of 'standard demo' tasks. Over 40 tasks are created in | |
this demo. For a much simpler demo, select the 'blinky' build | |
configuration. */ | |
vStartBlockingQueueTasks( mainBLOCK_Q_PRIORITY ); | |
vCreateBlockTimeTasks(); | |
vStartSemaphoreTasks( mainSEM_TEST_PRIORITY ); | |
vStartGenericQueueTasks( mainGEN_QUEUE_TASK_PRIORITY ); | |
vStartLEDFlashTasks( mainFLASH_TASK_PRIORITY ); | |
vStartQueuePeekTasks(); | |
vStartRecursiveMutexTasks(); | |
vStartTimerDemoTask( mainTIMER_TEST_PERIOD ); | |
vAltStartComTestTasks( mainCOM_TEST_PRIORITY, mainCOM_TEST_BAUD_RATE, mainCOM_TEST_LED ); | |
vStartPolledQueueTasks( mainQUEUE_POLL_PRIORITY ); | |
vStartCountingSemaphoreTasks(); | |
vStartDynamicPriorityTasks(); | |
/* The suicide tasks must be created last, as they need to know how many | |
tasks were running prior to their creation in order to ascertain whether | |
or not the correct/expected number of tasks are running at any given | |
time. */ | |
vCreateSuicidalTasks( mainCREATOR_TASK_PRIORITY ); | |
/* Start the tasks and timer running. */ | |
vTaskStartScheduler(); | |
} | |
/* 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 ) | |
{ | |
/* Check the standard demo tasks are running without error. Latch the | |
latest reported error in the pcStatusMessage character pointer. */ | |
if( xAreGenericQueueTasksStillRunning() != pdTRUE ) | |
{ | |
pcStatusMessage = "Error: GenQueue"; | |
} | |
if( xAreQueuePeekTasksStillRunning() != pdTRUE ) | |
{ | |
pcStatusMessage = "Error: QueuePeek\r\n"; | |
} | |
if( xAreBlockingQueuesStillRunning() != pdTRUE ) | |
{ | |
pcStatusMessage = "Error: BlockQueue\r\n"; | |
} | |
if( xAreBlockTimeTestTasksStillRunning() != pdTRUE ) | |
{ | |
pcStatusMessage = "Error: BlockTime\r\n"; | |
} | |
if( xAreSemaphoreTasksStillRunning() != pdTRUE ) | |
{ | |
pcStatusMessage = "Error: SemTest\r\n"; | |
} | |
if( xIsCreateTaskStillRunning() != pdTRUE ) | |
{ | |
pcStatusMessage = "Error: Death\r\n"; | |
} | |
if( xAreRecursiveMutexTasksStillRunning() != pdTRUE ) | |
{ | |
pcStatusMessage = "Error: RecMutex\r\n"; | |
} | |
if( xAreComTestTasksStillRunning() != pdPASS ) | |
{ | |
pcStatusMessage = "Error: ComTest\r\n"; | |
} | |
if( xAreTimerDemoTasksStillRunning( ( mainCHECK_TIMER_PERIOD_MS ) ) != pdTRUE ) | |
{ | |
pcStatusMessage = "Error: TimerDemo"; | |
} | |
if( xArePollingQueuesStillRunning() != pdTRUE ) | |
{ | |
pcStatusMessage = "Error: PollQueue"; | |
} | |
if( xAreCountingSemaphoreTasksStillRunning() != pdTRUE ) | |
{ | |
pcStatusMessage = "Error: CountSem"; | |
} | |
if( xAreDynamicPriorityTasksStillRunning() != pdTRUE ) | |
{ | |
pcStatusMessage = "Error: DynamicPriority"; | |
} | |
/* 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. vParTestToggleLED() | |
is not used to toggle this particular LED as it is on a different IP port | |
to to the LEDs controlled by ParTest.c. A critical section is not required | |
as the only other place this port is accessed is from another timer - and | |
only one timer can be running at any one time. */ | |
if( ( FM3_GPIO->PDOR3 & mainCHECK_LED ) != 0 ) | |
{ | |
FM3_GPIO->PDOR3 &= ~mainCHECK_LED; | |
} | |
else | |
{ | |
FM3_GPIO->PDOR3 |= mainCHECK_LED; | |
} | |
/* Have any errors been latch in pcStatusMessage? 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( pcStatusMessage != NULL ) | |
{ | |
/* This call to xTimerChangePeriod() uses a zero block time. Functions | |
called from inside of a timer callback function must *never* attempt | |
to block. */ | |
xTimerChangePeriod( xCheckTimer, ( mainERROR_CHECK_TIMER_PERIOD_MS ), mainDONT_BLOCK ); | |
} | |
} | |
/*-----------------------------------------------------------*/ | |
static void prvLEDTimerCallback( TimerHandle_t xTimer ) | |
{ | |
/* The timer has expired - so no button pushes have occurred in the last | |
five seconds - turn the LED off. */ | |
vParTestSetLED( mainTIMER_CONTROLLED_LED, pdFALSE ); | |
} | |
/*-----------------------------------------------------------*/ | |
static void prvDigitCounterTimerCallback( TimerHandle_t xTimer ) | |
{ | |
/* Define the bit patterns that display numbers on the seven segment display. */ | |
static const unsigned short usNumbersPatterns[] = { 0x8004, 0xF204, 0x4804, 0x6004, 0x3204, 0x2404, 0x0404, 0xF104, 0x0004, 0x2004 }; | |
static long lCounter = 0L; | |
const long lNumberOfDigits = 10L; | |
unsigned short usCheckLEDState; | |
/* Unfortunately the LED uses the same port as the digit counter, so remember | |
the state of the check LED. A critical section is not required to access | |
the port as only one timer can be executing at any one time. */ | |
usCheckLEDState = ( FM3_GPIO->PDOR3 & mainCHECK_LED ); | |
/* Display the next number, counting up. */ | |
FM3_GPIO->PDOR3 = usNumbersPatterns[ lCounter ] | usCheckLEDState; | |
/* Move onto the next digit. */ | |
lCounter++; | |
/* Ensure the counter does not go off the end of the array. */ | |
if( lCounter >= lNumberOfDigits ) | |
{ | |
lCounter = 0L; | |
} | |
} | |
/*-----------------------------------------------------------*/ | |
/* The ISR executed when the user button is pushed. */ | |
void INT0_7_Handler( void ) | |
{ | |
portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE; | |
/* The button was pushed, so ensure the LED is on before resetting the | |
LED timer. The LED timer will turn the LED off if the button is not | |
pushed within 5000ms. */ | |
vParTestSetLEDFromISR( mainTIMER_CONTROLLED_LED, pdTRUE ); | |
/* This interrupt safe FreeRTOS function can be called from this interrupt | |
because the interrupt priority is below the | |
configMAX_SYSCALL_INTERRUPT_PRIORITY setting in FreeRTOSConfig.h. */ | |
xTimerResetFromISR( xLEDTimer, &xHigherPriorityTaskWoken ); | |
/* Clear the interrupt before leaving. This just clears all the interrupts | |
for simplicity, as only one is actually used in this simple demo anyway. */ | |
FM3_EXTI->EICL = 0x0000; | |
/* If calling xTimerResetFromISR() caused a task (in this case the timer | |
service/daemon task) to unblock, and the unblocked task has a priority | |
higher than or equal to the task that was interrupted, then | |
xHigherPriorityTaskWoken will now be set to pdTRUE, and calling | |
portEND_SWITCHING_ISR() will ensure the unblocked task runs next. */ | |
portEND_SWITCHING_ISR( xHigherPriorityTaskWoken ); | |
} | |
/*-----------------------------------------------------------*/ | |
static void prvQueueSendTask( void *pvParameters ) | |
{ | |
TickType_t xNextWakeTime; | |
const unsigned long ulValueToSend = 100UL; | |
/* The timer command queue will have been filled when the timer test tasks | |
were created in main() (this is part of the test they perform). Therefore, | |
while the check and digit counter timers can be created in main(), they | |
cannot be started from main(). Once the scheduler has started, the timer | |
service task will drain the command queue, and now the check and digit | |
counter timers can be started successfully. */ | |
xTimerStart( xCheckTimer, portMAX_DELAY ); | |
xTimerStart( xDigitCounterTimer, portMAX_DELAY ); | |
/* Initialise xNextWakeTime - this only needs to be done once. */ | |
xNextWakeTime = xTaskGetTickCount(); | |
for( ;; ) | |
{ | |
/* Place this task in the blocked state until it is time to run again. | |
The block time is specified in ticks, the constant used converts ticks | |
to ms. While in the Blocked state this task will not consume any CPU | |
time. */ | |
vTaskDelayUntil( &xNextWakeTime, mainQUEUE_SEND_FREQUENCY_MS ); | |
/* Send to the queue - causing the queue receive task to unblock and | |
toggle an LED. 0 is used as the block time so the sending operation | |
will not block - it shouldn't need to block as the queue should always | |
be empty at this point in the code. */ | |
xQueueSend( xQueue, &ulValueToSend, mainDONT_BLOCK ); | |
} | |
} | |
/*-----------------------------------------------------------*/ | |
static void prvQueueReceiveTask( void *pvParameters ) | |
{ | |
unsigned long ulReceivedValue; | |
for( ;; ) | |
{ | |
/* Wait until something arrives in the queue - this task will block | |
indefinitely provided INCLUDE_vTaskSuspend is set to 1 in | |
FreeRTOSConfig.h. */ | |
xQueueReceive( xQueue, &ulReceivedValue, portMAX_DELAY ); | |
/* To get here something must have been received from the queue, but | |
is it the expected value? If it is, toggle the LED. */ | |
if( ulReceivedValue == 100UL ) | |
{ | |
vParTestToggleLED( mainTASK_CONTROLLED_LED ); | |
} | |
} | |
} | |
/*-----------------------------------------------------------*/ | |
static void prvSetupHardware( void ) | |
{ | |
const unsigned short usButtonInputBit = 0x01U; | |
SystemInit(); | |
SystemCoreClockUpdate(); | |
/* Initialise the IO used for the LEDs on the 7 segment displays. */ | |
vParTestInitialise(); | |
/* Set the switches to input (P18->P1F). */ | |
FM3_GPIO->DDR5 = 0x0000; | |
FM3_GPIO->PFR5 = 0x0000; | |
/* Assign the button input as GPIO. */ | |
FM3_GPIO->PFR5 |= usButtonInputBit; | |
/* Button interrupt on falling edge. */ | |
FM3_EXTI->ELVR = 0x0003; | |
/* Clear all external interrupts. */ | |
FM3_EXTI->EICL = 0x0000; | |
/* Enable the button interrupt. */ | |
FM3_EXTI->ENIR |= usButtonInputBit; | |
/* Setup the GPIO and the NVIC for the switch used in this simple demo. */ | |
NVIC_SetPriority( EXINT0_7_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY ); | |
NVIC_EnableIRQ( EXINT0_7_IRQn ); | |
} | |
/*-----------------------------------------------------------*/ | |
void vApplicationMallocFailedHook( void ) | |
{ | |
/* Called if a call to pvPortMalloc() fails because there is insufficient | |
free memory available in the FreeRTOS heap. pvPortMalloc() is called | |
internally by FreeRTOS API functions that create tasks, queues, software | |
timers, and semaphores. The size of the FreeRTOS heap is set by the | |
configTOTAL_HEAP_SIZE configuration constant in FreeRTOSConfig.h. */ | |
for( ;; ); | |
} | |
/*-----------------------------------------------------------*/ | |
void vApplicationStackOverflowHook( TaskHandle_t pxTask, char *pcTaskName ) | |
{ | |
( void ) pcTaskName; | |
( void ) pxTask; | |
/* Run time stack overflow checking is performed if | |
configconfigCHECK_FOR_STACK_OVERFLOW is defined to 1 or 2. This hook | |
function is called if a stack overflow is detected. */ | |
taskDISABLE_INTERRUPTS(); | |
for( ;; ); | |
} | |
/*-----------------------------------------------------------*/ | |
void vApplicationIdleHook( void ) | |
{ | |
volatile size_t xFreeStackSpace; | |
/* This function is called on each cycle of the idle task. In this case it | |
does nothing useful, other than report the amount of FreeRTOS heap that | |
remains unallocated. */ | |
xFreeStackSpace = xPortGetFreeHeapSize(); | |
if( xFreeStackSpace > 100 ) | |
{ | |
/* By now, the kernel has allocated everything it is going to, so | |
if there is a lot of heap remaining unallocated then | |
the value of configTOTAL_HEAP_SIZE in FreeRTOSConfig.h can be | |
reduced accordingly. */ | |
} | |
} | |
/*-----------------------------------------------------------*/ | |
void vApplicationTickHook( void ) | |
{ | |
/* Call the periodic timer test, which tests the timer API functions that | |
can be called from an ISR. */ | |
vTimerPeriodicISRTests(); | |
} | |
/*-----------------------------------------------------------*/ | |