| /* | |
| 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 !<< | |
| >>! 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 | |
| link: http://www.freertos.org/a00114.html | |
| 1 tab == 4 spaces! | |
| *************************************************************************** | |
| * * | |
| * Having a problem? Start by reading the FAQ "My application does * | |
| * not run, what could be wrong?" * | |
| * * | |
| * http://www.FreeRTOS.org/FAQHelp.html * | |
| * * | |
| *************************************************************************** | |
| http://www.FreeRTOS.org - Documentation, books, training, latest versions, | |
| license and Real Time Engineers Ltd. contact details. | |
| http://www.FreeRTOS.org/plus - 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. | |
| http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High | |
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| licenses offer ticketed support, indemnification and middleware. | |
| http://www.SafeRTOS.com - 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. | |
| 1 tab == 4 spaces! | |
| */ | |
| /* | |
| * 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 project runs on the SK-FM3-100PMC evaluation board, which is populated | |
| * with an MB9BF5006N Cortex-M3 based 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 "mb9bf506n.h" | |
| #include "system_mb9bf50x.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 0x07UL | |
| /* 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 0x06UL | |
| /* 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 ( 3 ) | |
| /* 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( 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[] = { 0xC000U, 0xF900U, 0xA400U, 0xB000U, 0x9900U, 0x9200U, 0x8200U, 0xF800U, 0x8000U, 0x9000U }; | |
| static long lCounter = 0L; | |
| const long lNumberOfDigits = 10L; | |
| /* Display the next number, counting up. */ | |
| FM3_GPIO->PDOR1 = usNumbersPatterns[ lCounter ]; | |
| /* 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->PFR1 |= 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(); | |
| } | |
| /*-----------------------------------------------------------*/ | |