[freertos] / FreeRTOS / Demo / CORTEX_MB9A310_IAR_Keil / main-full.c

/*\r
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/*\r
 * main-blinky.c is included when the "Blinky" build configuration is used.\r
 * main-full.c is included when the "Full" build configuration is used.\r
 *\r
 * main-full.c (this file) defines a comprehensive demo that creates many\r
 * tasks, queues, semaphores and timers.  It also demonstrates how Cortex-M3\r
 * interrupts can interact with FreeRTOS tasks/timers.\r
 *\r
 * This demo project runs on the SK-FM3-64PMC1 evaluation board, which is\r
 * populated with an MB9A300 microcontroller.\r
 *\r
 * The main() Function:\r
 * main() creates three demo specific software timers, one demo specific queue,\r
 * and two demo specific tasks.  It then creates a whole host of 'standard\r
 * demo' tasks/queues/semaphores, before starting the scheduler.  The demo\r
 * specific tasks and timers are described in the comments here.  The standard\r
 * demo tasks are described on the FreeRTOS.org web site.\r
 *\r
 * The standard demo tasks provide no specific functionality.  They are\r
 * included to both test the FreeRTOS port, and provide examples of how the\r
 * various FreeRTOS API functions can be used.\r
 *\r
 * This demo creates 43 tasks in total.  If you want a simpler demo, use the\r
 * Blinky build configuration.\r
 *\r
 * The Demo Specific Queue Send Task:\r
 * The queue send task is implemented by the prvQueueSendTask() function in\r
 * this file.  prvQueueSendTask() sits in a loop that causes it to repeatedly\r
 * block for 200 milliseconds, before sending the value 100 to the queue that\r
 * was created within main().  Once the value is sent, the task loops back\r
 * around to block for another 200 milliseconds.\r
 *\r
 * The Demo Specific Queue Receive Task:\r
 * The queue receive task is implemented by the prvQueueReceiveTask() function\r
 * in this file.  prvQueueReceiveTask() sits in a loop that causes it to\r
 * repeatedly attempt to read data from the queue that was created within\r
 * main().  When data is received, the task checks the value of the data, and\r
 * if the value equals the expected 100, toggles an LED in the 7 segment display\r
 * (see the documentation page for this demo on the FreeRTOS.org site to see\r
 * which LED is used).  The 'block time' parameter passed to the queue receive\r
 * function specifies that the task should be held in the Blocked state\r
 * indefinitely to wait for data to be available on the queue.  The queue\r
 * receive task will only leave the Blocked state when the queue send task\r
 * writes to the queue.  As the queue send task writes to the queue every 200\r
 * milliseconds, the queue receive task leaves the Blocked state every 200\r
 * milliseconds, and therefore toggles the LED every 200 milliseconds.\r
 *\r
 * The Demo Specific LED Software Timer and the Button Interrupt:\r
 * The user button SW2 is configured to generate an interrupt each time it is\r
 * pressed.  The interrupt service routine switches an LED on, and resets the\r
 * LED software timer.  The LED timer has a 5000 millisecond (5 second) period,\r
 * and uses a callback function that is defined to just turn the LED off again.\r
 * Therefore, pressing the user button will turn the LED on, and the LED will\r
 * remain on until a full five seconds pass without the button being pressed.\r
 * See the documentation page for this demo on the FreeRTOS.org web site to see\r
 * which LED is used.\r
 *\r
 * The Demo Specific "Check" Callback Function:\r
 * This is called each time the 'check' timer expires.  The check timer\r
 * callback function inspects all the standard demo tasks to see if they are\r
 * all executing as expected.  The check timer is initially configured to\r
 * expire every three seconds, but will shorted this to every 500ms if an error\r
 * is ever discovered.  The check timer callback toggles the LED defined by\r
 * the mainCHECK_LED definition each time it executes.  Therefore, if LED\r
 * mainCHECK_LED is toggling every three seconds, then no error have been found.\r
 * If LED mainCHECK_LED is toggling every 500ms, then at least one errors has\r
 * been found.  The variable pcStatusMessage is set to a string that indicates\r
 * which task reported an error.  See the documentation page for this demo on\r
 * the FreeRTOS.org web site to see which LED in the 7 segment display is used.\r
 *\r
 * The Demo Specific "Digit Counter" Callback Function:\r
 * This is called each time the 'digit counter' timer expires.  It causes the\r
 * digits 0 to 9 to be displayed in turn as the first character of the two\r
 * character display.  The LEDs in the other digit of the two character\r
 * display are used as general purpose LEDs, as described in this comment block.\r
 *\r
 * The Demo Specific Idle Hook Function:\r
 * The idle hook function demonstrates how to query the amount of FreeRTOS heap\r
 * space that is remaining (see vApplicationIdleHook() defined in this file).\r
 *\r
 * The Demo Specific Tick Hook Function:\r
 * The tick hook function is used to test the interrupt safe software timer\r
 * functionality.\r
 */\r
\r
/* Kernel includes. */\r
#include "FreeRTOS.h"\r
#include "task.h"\r
#include "queue.h"\r
#include "timers.h"\r
\r
/* Fujitsu drivers/libraries. */\r
#include "mcu.h"\r
\r
/* Common demo includes. */\r
#include "partest.h"\r
#include "flash.h"\r
#include "BlockQ.h"\r
#include "death.h"\r
#include "blocktim.h"\r
#include "semtest.h"\r
#include "GenQTest.h"\r
#include "QPeek.h"\r
#include "recmutex.h"\r
#include "TimerDemo.h"\r
#include "comtest2.h"\r
#include "PollQ.h"\r
#include "countsem.h"\r
#include "dynamic.h"\r
\r
/* The rate at which data is sent to the queue, specified in milliseconds, and\r
converted to ticks using the portTICK_RATE_MS constant. */\r
#define mainQUEUE_SEND_FREQUENCY_MS     ( 200 / portTICK_RATE_MS )\r
\r
/* The number of items the queue can hold.  This is 1 as the receive task\r
will remove items as they are added, meaning the send task should always find\r
the queue empty. */\r
#define mainQUEUE_LENGTH                        ( 1 )\r
\r
/* The LED toggled by the check timer callback function.  This is an LED in the\r
second digit of the two digit 7 segment display.  See the documentation page\r
for this demo on the FreeRTOS.org web site to see which LED this relates to. */\r
#define mainCHECK_LED                           ( 1UL << 3UL )\r
\r
/* The LED toggle by the queue receive task.  This is an LED in the second digit\r
of the two digit 7 segment display.  See the documentation page for this demo on\r
the FreeRTOS.org web site to see which LED this relates to. */\r
#define mainTASK_CONTROLLED_LED         0x07UL\r
\r
/* The LED turned on by the button interrupt, and turned off by the LED timer.\r
This is an LED in the second digit of the two digit 7 segment display.  See the\r
documentation page for this demo on the FreeRTOS.org web site to see which LED\r
this relates to. */\r
#define mainTIMER_CONTROLLED_LED        0x05UL\r
\r
/* The LED used by the comtest tasks. See the comtest.c file for more\r
information.  The LEDs used by the comtest task are in the second digit of the\r
two digit 7 segment display.  See the documentation page for this demo on the\r
FreeRTOS.org web site to see which LEDs this relates to. */\r
#define mainCOM_TEST_LED                        0x03UL\r
\r
/* Constant used by the standard timer test functions. */\r
#define mainTIMER_TEST_PERIOD           ( 50 )\r
\r
/* Priorities used by the various different standard demo tasks. */\r
#define mainCHECK_TASK_PRIORITY         ( configMAX_PRIORITIES - 1 )\r
#define mainQUEUE_POLL_PRIORITY         ( tskIDLE_PRIORITY + 1 )\r
#define mainSEM_TEST_PRIORITY           ( tskIDLE_PRIORITY + 1 )\r
#define mainBLOCK_Q_PRIORITY            ( tskIDLE_PRIORITY + 2 )\r
#define mainCREATOR_TASK_PRIORITY   ( tskIDLE_PRIORITY + 3 )\r
#define mainFLASH_TASK_PRIORITY         ( tskIDLE_PRIORITY + 1 )\r
#define mainINTEGER_TASK_PRIORITY   ( tskIDLE_PRIORITY )\r
#define mainGEN_QUEUE_TASK_PRIORITY     ( tskIDLE_PRIORITY )\r
#define mainCOM_TEST_PRIORITY           ( tskIDLE_PRIORITY + 2 )\r
\r
/* Priorities defined in this main-full.c file. */\r
#define mainQUEUE_RECEIVE_TASK_PRIORITY         ( tskIDLE_PRIORITY + 2 )\r
#define mainQUEUE_SEND_TASK_PRIORITY            ( tskIDLE_PRIORITY + 1 )\r
\r
/* The period at which the check timer will expire, in ms, provided no errors\r
have been reported by any of the standard demo tasks.  ms are converted to the\r
equivalent in ticks using the portTICK_RATE_MS constant. */\r
#define mainCHECK_TIMER_PERIOD_MS                       ( 3000UL / portTICK_RATE_MS )\r
\r
/* The period at which the check timer will expire, in ms, if an error has been\r
reported in one of the standard demo tasks.  ms are converted to the equivalent\r
in ticks using the portTICK_RATE_MS constant. */\r
#define mainERROR_CHECK_TIMER_PERIOD_MS         ( 500UL / portTICK_RATE_MS )\r
\r
/* The period at which the digit counter timer will expire, in ms, and converted\r
to ticks using the portTICK_RATE_MS constant. */\r
#define mainDIGIT_COUNTER_TIMER_PERIOD_MS       ( 250UL / portTICK_RATE_MS )\r
\r
/* The LED will remain on until the button has not been pushed for a full\r
5000ms. */\r
#define mainLED_TIMER_PERIOD_MS                         ( 5000UL / portTICK_RATE_MS )\r
\r
/* A zero block time. */\r
#define mainDONT_BLOCK                                          ( 0UL )\r
\r
/* Baud rate used by the comtest tasks. */\r
#define mainCOM_TEST_BAUD_RATE                          ( 115200UL )\r
\r
/*-----------------------------------------------------------*/\r
\r
/*\r
 * Setup the NVIC, LED outputs, and button inputs.\r
 */\r
static void prvSetupHardware( void );\r
\r
/*\r
 * The application specific (not common demo) tasks as described in the comments\r
 * at the top of this file.\r
 */\r
static void prvQueueReceiveTask( void *pvParameters );\r
static void prvQueueSendTask( void *pvParameters );\r
\r
/*\r
 * The LED timer callback function.  This does nothing but switch an LED off.\r
 */\r
static void prvLEDTimerCallback( xTimerHandle xTimer );\r
\r
/*\r
 * The check timer callback function, as described at the top of this file.\r
 */\r
static void prvCheckTimerCallback( xTimerHandle xTimer );\r
\r
/*\r
 * The digit counter callback function, as described at the top of this file.\r
 */\r
static void prvDigitCounterTimerCallback( xTimerHandle xTimer );\r
\r
/*\r
 * This is not a 'standard' partest function, so the prototype is not in\r
 * partest.h, and is instead included here.\r
 */\r
void vParTestSetLEDFromISR( unsigned portBASE_TYPE uxLED, signed portBASE_TYPE xValue );\r
\r
/*-----------------------------------------------------------*/\r
\r
/* The queue used by both application specific demo tasks defined in this file. */\r
static xQueueHandle xQueue = NULL;\r
\r
/* The LED software timer.  This uses prvLEDTimerCallback() as it's callback\r
function. */\r
static xTimerHandle xLEDTimer = NULL;\r
\r
/* The digit counter software timer.  This displays a counting digit on one half\r
of the seven segment displays. */\r
static xTimerHandle xDigitCounterTimer = NULL;\r
\r
/* The check timer.  This uses prvCheckTimerCallback() as its callback\r
function. */\r
static xTimerHandle xCheckTimer = NULL;\r
\r
/* If an error is detected in a standard demo task, then pcStatusMessage will\r
be set to point to a string that identifies the offending task.  This is just\r
to make debugging easier. */\r
static const char *pcStatusMessage = NULL;\r
\r
/*-----------------------------------------------------------*/\r
\r
int main(void)\r
{\r
        /* Configure the NVIC, LED outputs and button inputs. */\r
        prvSetupHardware();\r
\r
        /* Create the queue. */\r
        xQueue = xQueueCreate( mainQUEUE_LENGTH, sizeof( unsigned long ) );\r
\r
        if( xQueue != NULL )\r
        {\r
                /* Start the two application specific demo tasks, as described in the\r
                comments at the top of this     file. */\r
                xTaskCreate( prvQueueReceiveTask, ( signed char * ) "Rx", configMINIMAL_STACK_SIZE, NULL, mainQUEUE_RECEIVE_TASK_PRIORITY, NULL );\r
                xTaskCreate( prvQueueSendTask, ( signed char * ) "TX", configMINIMAL_STACK_SIZE, NULL, mainQUEUE_SEND_TASK_PRIORITY, NULL );\r
\r
                /* Create the software timer that is responsible for turning off the LED\r
                if the button is not pushed within 5000ms, as described at the top of\r
                this file. */\r
                xLEDTimer = xTimerCreate(       ( const signed char * ) "LEDTimer", /* A text name, purely to help debugging. */\r
                                                                        ( mainLED_TIMER_PERIOD_MS ),            /* The timer period, in this case 5000ms (5s). */\r
                                                                        pdFALSE,                                                        /* This is a one shot timer, so xAutoReload is set to pdFALSE. */\r
                                                                        ( void * ) 0,                                           /* The ID is not used, so can be set to anything. */\r
                                                                        prvLEDTimerCallback                                     /* The callback function that switches the LED off. */\r
                                                                );\r
\r
                /* Create the software timer that performs the 'check' functionality,\r
                as described at the top of this file. */\r
                xCheckTimer = xTimerCreate( ( const signed char * ) "CheckTimer",/* A text name, purely to help debugging. */\r
                                                                        ( mainCHECK_TIMER_PERIOD_MS ),          /* The timer period, in this case 3000ms (3s). */\r
                                                                        pdTRUE,                                                         /* This is an auto-reload timer, so xAutoReload is set to pdTRUE. */\r
                                                                        ( void * ) 0,                                           /* The ID is not used, so can be set to anything. */\r
                                                                        prvCheckTimerCallback                           /* The callback function that inspects the status of all the other tasks. */\r
                                                                  );\r
\r
                /* Create the software timer that performs the 'digit counting'\r
                functionality, as described at the top of this file. */\r
                xDigitCounterTimer = xTimerCreate( ( const signed char * ) "DigitCounter",      /* A text name, purely to help debugging. */\r
                                                                        ( mainDIGIT_COUNTER_TIMER_PERIOD_MS ),                  /* The timer period, in this case 3000ms (3s). */\r
                                                                        pdTRUE,                                                                                 /* This is an auto-reload timer, so xAutoReload is set to pdTRUE. */\r
                                                                        ( void * ) 0,                                                                   /* The ID is not used, so can be set to anything. */\r
                                                                        prvDigitCounterTimerCallback                                    /* The callback function that inspects the status of all the other tasks. */\r
                                                                  );            \r
                \r
                /* Create a lot of 'standard demo' tasks.  Over 40 tasks are created in\r
                this demo.  For a much simpler demo, select the 'blinky' build\r
                configuration. */\r
                vStartBlockingQueueTasks( mainBLOCK_Q_PRIORITY );\r
                vCreateBlockTimeTasks();\r
                vStartSemaphoreTasks( mainSEM_TEST_PRIORITY );\r
                vStartGenericQueueTasks( mainGEN_QUEUE_TASK_PRIORITY );\r
                vStartLEDFlashTasks( mainFLASH_TASK_PRIORITY );\r
                vStartQueuePeekTasks();\r
                vStartRecursiveMutexTasks();\r
                vStartTimerDemoTask( mainTIMER_TEST_PERIOD );\r
                vAltStartComTestTasks( mainCOM_TEST_PRIORITY, mainCOM_TEST_BAUD_RATE, mainCOM_TEST_LED );\r
                vStartPolledQueueTasks( mainQUEUE_POLL_PRIORITY );\r
                vStartCountingSemaphoreTasks();\r
                vStartDynamicPriorityTasks();\r
                \r
                /* The suicide tasks must be created last, as they need to know how many\r
                tasks were running prior to their creation in order to ascertain whether\r
                or not the correct/expected number of tasks are running at any given\r
                time. */\r
                vCreateSuicidalTasks( mainCREATOR_TASK_PRIORITY );\r
\r
                /* Start the tasks and timer running. */\r
                vTaskStartScheduler();\r
        }\r
\r
        /* If all is well, the scheduler will now be running, and the following line\r
        will never be reached.  If the following line does execute, then there was\r
        insufficient FreeRTOS heap memory available for the idle and/or timer tasks\r
        to be created.  See the memory management section on the FreeRTOS web site\r
        for more details. */\r
        for( ;; );\r
}\r
/*-----------------------------------------------------------*/\r
\r
static void prvCheckTimerCallback( xTimerHandle xTimer )\r
{\r
        /* Check the standard demo tasks are running without error.   Latch the\r
        latest reported error in the pcStatusMessage character pointer. */\r
        if( xAreGenericQueueTasksStillRunning() != pdTRUE )\r
        {\r
                pcStatusMessage = "Error: GenQueue";\r
        }\r
\r
        if( xAreQueuePeekTasksStillRunning() != pdTRUE )\r
        {\r
                pcStatusMessage = "Error: QueuePeek\r\n";\r
        }\r
\r
        if( xAreBlockingQueuesStillRunning() != pdTRUE )\r
        {\r
                pcStatusMessage = "Error: BlockQueue\r\n";\r
        }\r
\r
        if( xAreBlockTimeTestTasksStillRunning() != pdTRUE )\r
        {\r
                pcStatusMessage = "Error: BlockTime\r\n";\r
        }\r
\r
        if( xAreSemaphoreTasksStillRunning() != pdTRUE )\r
        {\r
                pcStatusMessage = "Error: SemTest\r\n";\r
        }\r
\r
        if( xIsCreateTaskStillRunning() != pdTRUE )\r
        {\r
                pcStatusMessage = "Error: Death\r\n";\r
        }\r
\r
        if( xAreRecursiveMutexTasksStillRunning() != pdTRUE )\r
        {\r
                pcStatusMessage = "Error: RecMutex\r\n";\r
        }\r
\r
        if( xAreComTestTasksStillRunning() != pdPASS )\r
        {\r
                pcStatusMessage = "Error: ComTest\r\n";\r
        }\r
        \r
        if( xAreTimerDemoTasksStillRunning( ( mainCHECK_TIMER_PERIOD_MS ) ) != pdTRUE )\r
        {\r
                pcStatusMessage = "Error: TimerDemo";\r
        }\r
\r
        if( xArePollingQueuesStillRunning() != pdTRUE )\r
        {\r
                pcStatusMessage = "Error: PollQueue";\r
        }\r
\r
        if( xAreCountingSemaphoreTasksStillRunning() != pdTRUE )\r
        {\r
                pcStatusMessage = "Error: CountSem";\r
        }\r
        \r
        if( xAreDynamicPriorityTasksStillRunning() != pdTRUE )\r
        {\r
                pcStatusMessage = "Error: DynamicPriority";\r
        }\r
        \r
        /* Toggle the check LED to give an indication of the system status.  If\r
        the LED toggles every mainCHECK_TIMER_PERIOD_MS milliseconds then\r
        everything is ok.  A faster toggle indicates an error.  vParTestToggleLED()\r
        is not used to toggle this particular LED as it is on a different IP port\r
        to to the LEDs controlled by ParTest.c.  A critical section is not required\r
        as the only other place this port is accessed is from another timer - and\r
        only one timer can be running at any one time. */\r
        if( ( FM3_GPIO->PDOR3 & mainCHECK_LED ) != 0 )\r
        {\r
                FM3_GPIO->PDOR3 &= ~mainCHECK_LED;\r
        }\r
        else\r
        {\r
                FM3_GPIO->PDOR3 |= mainCHECK_LED;\r
        }\r
\r
        /* Have any errors been latch in pcStatusMessage?  If so, shorten the\r
        period of the check timer to mainERROR_CHECK_TIMER_PERIOD_MS milliseconds.\r
        This will result in an increase in the rate at which mainCHECK_LED\r
        toggles. */\r
        if( pcStatusMessage != NULL )\r
        {\r
                /* This call to xTimerChangePeriod() uses a zero block time.  Functions\r
                called from inside of a timer callback function must *never* attempt\r
                to block. */\r
                xTimerChangePeriod( xCheckTimer, ( mainERROR_CHECK_TIMER_PERIOD_MS ), mainDONT_BLOCK );\r
        }\r
}\r
/*-----------------------------------------------------------*/\r
\r
static void prvLEDTimerCallback( xTimerHandle xTimer )\r
{\r
        /* The timer has expired - so no button pushes have occurred in the last\r
        five seconds - turn the LED off. */\r
        vParTestSetLED( mainTIMER_CONTROLLED_LED, pdFALSE );\r
}\r
/*-----------------------------------------------------------*/\r
\r
static void prvDigitCounterTimerCallback( xTimerHandle xTimer )\r
{\r
/* Define the bit patterns that display numbers on the seven segment display. */\r
static const unsigned short usNumbersPatterns[] = { 0x8004, 0xF204, 0x4804, 0x6004, 0x3204, 0x2404, 0x0404, 0xF104, 0x0004, 0x2004 };\r
static long lCounter = 0L;\r
const long lNumberOfDigits = 10L;\r
unsigned short usCheckLEDState;\r
\r
        /* Unfortunately the LED uses the same port as the digit counter, so remember\r
        the state of the check LED.  A critical section is not required to access\r
        the port as only one timer can be executing at any one time. */\r
        usCheckLEDState = ( FM3_GPIO->PDOR3 & mainCHECK_LED );\r
        \r
        /* Display the next number, counting up. */\r
        FM3_GPIO->PDOR3 = usNumbersPatterns[ lCounter ] | usCheckLEDState;\r
\r
        /* Move onto the next digit. */ \r
        lCounter++;\r
        \r
        /* Ensure the counter does not go off the end of the array. */\r
        if( lCounter >= lNumberOfDigits )\r
        {\r
                lCounter = 0L;\r
        }\r
}\r
/*-----------------------------------------------------------*/\r
\r
/* The ISR executed when the user button is pushed. */\r
void INT0_7_Handler( void )\r
{\r
portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;\r
\r
        /* The button was pushed, so ensure the LED is on before resetting the\r
        LED timer.  The LED timer will turn the LED off if the button is not\r
        pushed within 5000ms. */\r
        vParTestSetLEDFromISR( mainTIMER_CONTROLLED_LED, pdTRUE );\r
\r
        /* This interrupt safe FreeRTOS function can be called from this interrupt\r
        because the interrupt priority is below the\r
        configMAX_SYSCALL_INTERRUPT_PRIORITY setting in FreeRTOSConfig.h. */\r
        xTimerResetFromISR( xLEDTimer, &xHigherPriorityTaskWoken );\r
\r
        /* Clear the interrupt before leaving.  This just clears all the interrupts\r
        for simplicity, as only one is actually used in this simple demo anyway. */\r
        FM3_EXTI->EICL = 0x0000;\r
\r
        /* If calling xTimerResetFromISR() caused a task (in this case the timer\r
        service/daemon task) to unblock, and the unblocked task has a priority\r
        higher than or equal to the task that was interrupted, then\r
        xHigherPriorityTaskWoken will now be set to pdTRUE, and calling\r
        portEND_SWITCHING_ISR() will ensure the unblocked task runs next. */\r
        portEND_SWITCHING_ISR( xHigherPriorityTaskWoken );\r
}\r
/*-----------------------------------------------------------*/\r
\r
static void prvQueueSendTask( void *pvParameters )\r
{\r
portTickType xNextWakeTime;\r
const unsigned long ulValueToSend = 100UL;\r
\r
        /* The timer command queue will have been filled when the timer test tasks\r
        were created in main() (this is part of the test they perform).  Therefore,\r
        while the check and digit counter timers can be created in main(), they\r
        cannot be started from main().  Once the scheduler has started, the timer\r
        service task will drain the command queue, and now the check and digit\r
        counter timers can be started successfully. */\r
        xTimerStart( xCheckTimer, portMAX_DELAY );\r
        xTimerStart( xDigitCounterTimer, portMAX_DELAY );\r
\r
        /* Initialise xNextWakeTime - this only needs to be done once. */\r
        xNextWakeTime = xTaskGetTickCount();\r
\r
        for( ;; )\r
        {\r
                /* Place this task in the blocked state until it is time to run again.\r
                The block time is specified in ticks, the constant used converts ticks\r
                to ms.  While in the Blocked state this task will not consume any CPU\r
                time. */\r
                vTaskDelayUntil( &xNextWakeTime, mainQUEUE_SEND_FREQUENCY_MS );\r
\r
                /* Send to the queue - causing the queue receive task to unblock and\r
                toggle an LED.  0 is used as the block time so the sending operation\r
                will not block - it shouldn't need to block as the queue should always\r
                be empty at this point in the code. */\r
                xQueueSend( xQueue, &ulValueToSend, mainDONT_BLOCK );\r
        }\r
}\r
/*-----------------------------------------------------------*/\r
\r
static void prvQueueReceiveTask( void *pvParameters )\r
{\r
unsigned long ulReceivedValue;\r
\r
        for( ;; )\r
        {\r
                /* Wait until something arrives in the queue - this task will block\r
                indefinitely provided INCLUDE_vTaskSuspend is set to 1 in\r
                FreeRTOSConfig.h. */\r
                xQueueReceive( xQueue, &ulReceivedValue, portMAX_DELAY );\r
\r
                /*  To get here something must have been received from the queue, but\r
                is it the expected value?  If it is, toggle the LED. */\r
                if( ulReceivedValue == 100UL )\r
                {\r
                        vParTestToggleLED( mainTASK_CONTROLLED_LED );\r
                }\r
        }\r
}\r
/*-----------------------------------------------------------*/\r
\r
static void prvSetupHardware( void )\r
{\r
const unsigned short usButtonInputBit = 0x01U;\r
\r
        SystemInit();\r
        SystemCoreClockUpdate();\r
\r
        /* Initialise the IO used for the LEDs on the 7 segment displays. */\r
        vParTestInitialise();   \r
        \r
        /* Set the switches to input (P18->P1F). */\r
        FM3_GPIO->DDR5 = 0x0000;\r
        FM3_GPIO->PFR5 = 0x0000;\r
\r
        /* Assign the button input as GPIO. */\r
        FM3_GPIO->PFR5 |= usButtonInputBit;\r
        \r
        /* Button interrupt on falling edge. */\r
        FM3_EXTI->ELVR  = 0x0003;\r
\r
        /* Clear all external interrupts. */\r
        FM3_EXTI->EICL  = 0x0000;\r
\r
        /* Enable the button interrupt. */\r
        FM3_EXTI->ENIR |= usButtonInputBit;\r
        \r
        /* Setup the GPIO and the NVIC for the switch used in this simple demo. */\r
        NVIC_SetPriority( EXINT0_7_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY );\r
    NVIC_EnableIRQ( EXINT0_7_IRQn );\r
}\r
/*-----------------------------------------------------------*/\r
\r
void vApplicationMallocFailedHook( void )\r
{\r
        /* Called if a call to pvPortMalloc() fails because there is insufficient\r
        free memory available in the FreeRTOS heap.  pvPortMalloc() is called\r
        internally by FreeRTOS API functions that create tasks, queues, software\r
        timers, and semaphores.  The size of the FreeRTOS heap is set by the\r
        configTOTAL_HEAP_SIZE configuration constant in FreeRTOSConfig.h. */\r
        for( ;; );\r
}\r
/*-----------------------------------------------------------*/\r
\r
void vApplicationStackOverflowHook( xTaskHandle pxTask, signed char *pcTaskName )\r
{\r
        ( void ) pcTaskName;\r
        ( void ) pxTask;\r
\r
        /* Run time stack overflow checking is performed if\r
        configconfigCHECK_FOR_STACK_OVERFLOW is defined to 1 or 2.  This hook\r
        function is called if a stack overflow is detected. */\r
        taskDISABLE_INTERRUPTS();\r
        for( ;; );\r
}\r
/*-----------------------------------------------------------*/\r
\r
void vApplicationIdleHook( void )\r
{\r
volatile size_t xFreeStackSpace;\r
\r
        /* This function is called on each cycle of the idle task.  In this case it\r
        does nothing useful, other than report the amount of FreeRTOS heap that\r
        remains unallocated. */\r
        xFreeStackSpace = xPortGetFreeHeapSize();\r
\r
        if( xFreeStackSpace > 100 )\r
        {\r
                /* By now, the kernel has allocated everything it is going to, so\r
                if there is a lot of heap remaining unallocated then\r
                the value of configTOTAL_HEAP_SIZE in FreeRTOSConfig.h can be\r
                reduced accordingly. */\r
        }\r
}\r
/*-----------------------------------------------------------*/\r
\r
void vApplicationTickHook( void )\r
{\r
        /* Call the periodic timer test, which tests the timer API functions that\r
        can be called from an ISR. */\r
        vTimerPeriodicISRTests();\r
}       \r
/*-----------------------------------------------------------*/\r
\r