Demo/NEC_V850ES_IAR/main.c

/*
	FreeRTOS.org V5.2.0 - Copyright (C) 2003-2009 Richard Barry.

	This file is part of the FreeRTOS.org distribution.

	FreeRTOS.org 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.

	FreeRTOS.org 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.  See the GNU General Public License for 
	more details.

	You should have received a copy of the GNU General Public License along 
	with FreeRTOS.org; if not, write to the Free Software Foundation, Inc., 59 
	Temple Place, Suite 330, Boston, MA  02111-1307  USA.

	A special exception to the GPL is included to allow you to distribute a 
	combined work that includes FreeRTOS.org without being obliged to provide
	the source code for any proprietary components.  See the licensing section
	of http://www.FreeRTOS.org for full details.


	***************************************************************************
	*                                                                         *
	* Get the FreeRTOS eBook!  See http://www.FreeRTOS.org/Documentation      *
	*                                                                         *
	* This is a concise, step by step, 'hands on' guide that describes both   *
	* general multitasking concepts and FreeRTOS specifics. It presents and   *
	* explains numerous examples that are written using the FreeRTOS API.     *
	* Full source code for all the examples is provided in an accompanying    *
	* .zip file.                                                              *
	*                                                                         *
	***************************************************************************

	1 tab == 4 spaces!

	Please ensure to read the configuration and relevant port sections of the
	online documentation.

	http://www.FreeRTOS.org - Documentation, latest information, license and
	contact details.

	http://www.SafeRTOS.com - A version that is certified for use in safety
	critical systems.

	http://www.OpenRTOS.com - Commercial support, development, porting,
	licensing and training services.
*/

/*
 * 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		( ( portTickType ) 3000 / portTICK_RATE_MS  )
#define mainERROR_DELAY			( ( portTickType ) 500 / portTICK_RATE_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 portLONG 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 )
{
portTickType 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( ;; );
}