path: root/FreeRTOS/Demo/NEC_V850ES_IAR/main.c

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*/

/*
 * Creates all the demo application tasks, then starts the scheduler.  The WEB
 * documentation provides more details of the standard demo application tasks.
 * In addition to the standard demo tasks, the following tasks and tests are
 * defined and/or created within this file:
 *
 * "Check" task -  This only executes every three seconds but has a high priority
 * to ensure it gets processor time.  Its main function is to check that all the
 * standard demo tasks are still operational.  If everything is running as
 * expected then the check task will toggle an LED every 3 seconds.  An error
 * being discovered in any task will cause the toggle rate to increase to 500ms.
 *
 * "Reg test" tasks - These fill the registers with known values, then check
 * that each register still contains its expected value.  Each task uses
 * different values.  The tasks run with very low priority so get preempted very
 * frequently.  A register containing an unexpected value is indicative of an
 * error in the context switching mechanism.
 *
 */

/* Standard include files. */
#include <stdlib.h>
#include <string.h>

/* Scheduler include files. */
#include "FreeRTOS.h"
#include "task.h"

/* Demo file headers. */
#include <intrinsics.h>
#include "BlockQ.h"
#include "death.h"
#include "flash.h"
#include "partest.h"
#include "semtest.h"
#include "PollQ.h"
#include "GenQTest.h"
#include "QPeek.h"
#include "recmutex.h"
#include "comtest2.h"

/*
 * Priority definitions for most of the tasks in the demo application.  Some
 * tasks just use the idle priority.
 */
#define mainFLASH_PRIORITY					( tskIDLE_PRIORITY + 1 )
#define mainQUEUE_POLL_PRIORITY				( tskIDLE_PRIORITY + 2 )
#define mainCHECK_TASK_PRIORITY				( tskIDLE_PRIORITY + 3 )
#define mainSEM_TEST_PRIORITY				( tskIDLE_PRIORITY + 1 )
#define mainBLOCK_Q_PRIORITY				( tskIDLE_PRIORITY + 2 )
#define mainCREATOR_TASK_PRIORITY           ( tskIDLE_PRIORITY + 2 )
#define mainINTEGER_TASK_PRIORITY           ( tskIDLE_PRIORITY )
#define mainGEN_QUEUE_TASK_PRIORITY			( tskIDLE_PRIORITY )
#define mainCOMTEST_PRIORITY				( tskIDLE_PRIORITY + 1 )

/* Passed into the check task just as a test that the parameter passing
mechanism is working correctly. */
#define mainCHECK_PARAMETER					( ( void * ) 0x12345678 )

/* The period between executions of the check task. */
#define mainNO_ERROR_DELAY		( ( TickType_t ) 3000 / portTICK_PERIOD_MS  )
#define mainERROR_DELAY			( ( TickType_t ) 500 / portTICK_PERIOD_MS )

/* There are no spare LEDs for the comtest tasks, so this is just set to an
invalid number. */
#define mainCOMTEST_LED			( 4 )

/* The baud rate used by the comtest task. */
#define mainBAUD_RATE			( 9600 )

/*-----------------------------------------------------------*/

/* The implementation of the 'check' task as described at the top of this file. */
static void prvCheckTask( void *pvParameters );

/* Just sets up the LED outputs.  Most generic setup is done in
__low_level_init(). */
static void prvSetupHardware( void );

/* The RegTest functions as described at the top of this file. */
extern void vRegTest1( void *pvParameters );
extern void vRegTest2( void *pvParameters );

/* A variable that will get set to fail if a RegTest task finds an error.  The
variable is inspected by the 'Check' task. */
static volatile long lRegTestStatus = pdPASS;

/*-----------------------------------------------------------*/

/* Create all the demo tasks then start the scheduler. */
void main( void )
{
	/* Just sets up the LED outputs. */
	prvSetupHardware();

	/* Standard demo tasks. */
	vStartSemaphoreTasks( mainSEM_TEST_PRIORITY );
	vStartGenericQueueTasks( mainGEN_QUEUE_TASK_PRIORITY );
	vStartQueuePeekTasks();
	
	/* Create the check task as described at the top of this file. */
	xTaskCreate( prvCheckTask, "Check", configMINIMAL_STACK_SIZE, mainCHECK_PARAMETER, mainCHECK_TASK_PRIORITY, NULL );

	/* Create the RegTest tasks as described at the top of this file. */
	xTaskCreate( vRegTest1, "Reg1", configMINIMAL_STACK_SIZE, NULL, tskIDLE_PRIORITY, NULL );
	xTaskCreate( vRegTest2, "Reg2", configMINIMAL_STACK_SIZE, NULL, tskIDLE_PRIORITY, NULL );

	#ifdef __IAR_V850ES_Fx3__
	{
		/* The extra IO required for the com test and led flashing tasks is only
		available on the application board, not the target boards. */	
		vAltStartComTestTasks( mainCOMTEST_PRIORITY, mainBAUD_RATE, mainCOMTEST_LED );
		vStartLEDFlashTasks( mainFLASH_PRIORITY );
		
		/* The Fx3 also has enough RAM to run loads more tasks. */
		vStartRecursiveMutexTasks();
		vStartBlockingQueueTasks( mainBLOCK_Q_PRIORITY );
		vStartPolledQueueTasks( mainQUEUE_POLL_PRIORITY );				
	}
	#endif	
	
	/* 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 scheduler. */
	vTaskStartScheduler();

	/* If this line is reached then vTaskStartScheduler() returned because there
	was insufficient heap memory remaining for the idle task to be created. */
	for( ;; );
}
/*-----------------------------------------------------------*/

static void prvCheckTask( void *pvParameters )
{
TickType_t xDelayPeriod = mainNO_ERROR_DELAY, xLastWakeTime;
unsigned portBASE_TYPE uxLEDToUse = 0;

	/* Ensure parameter is passed in correctly. */
	if( pvParameters != mainCHECK_PARAMETER )
	{
		xDelayPeriod = mainERROR_DELAY;
	}
	
	/* Initialise xLastWakeTime before it is used.  After this point it is not
	written to directly. */
	xLastWakeTime = xTaskGetTickCount();
	
	/* Cycle for ever, delaying then checking all the other tasks are still
	operating without error. */
	for( ;; )
	{
		/* Wait until it is time to check all the other tasks again. */
		vTaskDelayUntil( &xLastWakeTime, xDelayPeriod );
		
		if( lRegTestStatus != pdPASS )
		{
			xDelayPeriod = mainERROR_DELAY;
		}
		
		if( xAreGenericQueueTasksStillRunning() != pdTRUE )
		{
			xDelayPeriod = mainERROR_DELAY;
		}

		if( xAreQueuePeekTasksStillRunning() != pdTRUE )
		{
			xDelayPeriod = mainERROR_DELAY;
		}

		if( xAreSemaphoreTasksStillRunning() != pdTRUE )
	    {
	    	xDelayPeriod = mainERROR_DELAY;
	    }

		if( xIsCreateTaskStillRunning() != pdTRUE )
	    {
	    	xDelayPeriod = mainERROR_DELAY;
	    }

		/* The Fx3 runs more tasks, so more checks are performed. */		
		#ifdef __IAR_V850ES_Fx3__
		{
			if( xAreComTestTasksStillRunning() != pdTRUE )
			{
				xDelayPeriod = mainERROR_DELAY;
			}
			
			if( xArePollingQueuesStillRunning() != pdTRUE )
			{
				xDelayPeriod = mainERROR_DELAY;
			}

			if( xAreBlockingQueuesStillRunning() != pdTRUE )
			{
				xDelayPeriod = mainERROR_DELAY;
			}
			
			if( xAreRecursiveMutexTasksStillRunning() != pdTRUE )
			{
				xDelayPeriod = mainERROR_DELAY;
			}		
			
			/* The application board has more LEDs and uses the flash tasks
			so the check task instead uses LED3 as LED3 is still spare. */
			uxLEDToUse = 3;
		}
		#endif

		/* Toggle the LED.  The toggle rate will depend on whether or not an
		error has been found in any tasks. */
		vParTestToggleLED( uxLEDToUse );
	}
}
/*-----------------------------------------------------------*/

static void prvSetupHardware( void )
{
	/* Setup the LED outputs. */
	vParTestInitialise();

	/* Any additional hardware configuration can be added here. */
}
/*-----------------------------------------------------------*/

void vApplicationStackOverflowHook( void )
{
	/* This will be called if a task overflows its stack.  pxCurrentTCB
	can be inspected to see which is the offending task. */
	for( ;; );
}
/*-----------------------------------------------------------*/

void vRegTestFailed( void )
{
	/* Called by the RegTest tasks if an error is found.  lRegTestStatus is
	inspected by the check task. */
	lRegTestStatus = pdFAIL;
	
	/* Do not return from here as the reg test tasks clobber all registers so
	function calls may not function correctly. */
	for( ;; );
}