main.c

MSP430 IAR project with FreeRTOS port.

	then it is likely that the memory allocation failed. */

	for( ;; )
	{
		/* Dynamically create a task - passing ulMemCheckTaskRunningCount as a 
		parameter. */
		ulMemCheckTaskRunningCount = mainCOUNT_INITIAL_VALUE;
		xCreatedTask = mainNO_TASK;
		if( xTaskCreate( vMemCheckTask, ( signed portCHAR * ) "MEM_CHECK", configMINIMAL_STACK_SIZE, ( void * ) &ulMemCheckTaskRunningCount, tskIDLE_PRIORITY, &xCreatedTask ) != pdPASS )
		{
			/* Could not create the task - we have probably run out of heap. */
			xDelayPeriod = mainERROR_FLASH_PERIOD;
		}

		/* Delay until it is time to execute again. */
		vTaskDelay( xDelayPeriod );
	
		/* Delete the dynamically created task. */
		if( xCreatedTask != mainNO_TASK )
		{
			vTaskDelete( xCreatedTask );
		}

		/* Check all the standard demo application tasks are executing without 
		error.  ulMemCheckTaskRunningCount is checked to ensure it was
		modified by the task just deleted. */
		if( prvCheckOtherTasksAreStillRunning( ulMemCheckTaskRunningCount ) != pdPASS )
		{
			/* An error has been detected in one of the tasks - flash faster. */
			xDelayPeriod = mainERROR_FLASH_PERIOD;
		}

		prvToggleOnBoardLED();
	}
}
/*-----------------------------------------------------------*/

static void prvSetupHardware( void )
{
	#ifdef RUN_FROM_RAM
		/* Remap the interrupt vectors to RAM if we are are running from RAM. */
		SCB_MEMMAP = 2;
	#endif

	/* Configure the RS2332 pins.  All other pins remain at their default of 0. */
	PCB_PINSEL0 |= mainTX_ENABLE;
	PCB_PINSEL0 |= mainRX_ENABLE;

	/* Set all GPIO to output other than the P0.14 (BSL), and the JTAG pins.  
	The JTAG pins are left as input as I'm not sure what will happen if the 
	Wiggler is connected after powerup - not that it would be a good idea to
	do that anyway. */
	GPIO_IODIR = ~( mainP0_14 + mainJTAG_PORT );

	/* Setup the PLL to multiply the XTAL input by 4. */
	SCB_PLLCFG = ( mainPLL_MUL_4 | mainPLL_DIV_1 );

	/* Activate the PLL by turning it on then feeding the correct sequence of
	bytes. */
	SCB_PLLCON = mainPLL_ENABLE;
	SCB_PLLFEED = mainPLL_FEED_BYTE1;
	SCB_PLLFEED = mainPLL_FEED_BYTE2;

	/* Wait for the PLL to lock... */
	while( !( SCB_PLLSTAT & mainPLL_LOCK ) );

	/* ...before connecting it using the feed sequence again. */
	SCB_PLLCON = mainPLL_CONNECT;
	SCB_PLLFEED = mainPLL_FEED_BYTE1;
	SCB_PLLFEED = mainPLL_FEED_BYTE2;

	/* Setup and turn on the MAM.  Three cycle access is used due to the fast
	PLL used.  It is possible faster overall performance could be obtained by
	tuning the MAM and PLL settings. */
	MAM_TIM = mainMAM_TIM_3;
	MAM_CR = mainMAM_MODE_FULL;

	/* Setup the peripheral bus to be the same as the PLL output. */
	SCB_VPBDIV = mainBUS_CLK_FULL;
	
	/* Initialise LED outputs. */
	vParTestInitialise();
}
/*-----------------------------------------------------------*/

void prvToggleOnBoardLED( void )
{
unsigned portLONG ulState;

	ulState = GPIO0_IOPIN;
	if( ulState & mainON_BOARD_LED_BIT )
	{
		GPIO_IOCLR = mainON_BOARD_LED_BIT;
	}
	else
	{
		GPIO_IOSET = mainON_BOARD_LED_BIT;
	}	
}
/*-----------------------------------------------------------*/

static portLONG prvCheckOtherTasksAreStillRunning( unsigned portLONG ulMemCheckTaskCount )
{
portLONG lReturn = ( portLONG ) pdPASS;

	/* Check all the demo tasks (other than the flash tasks) to ensure
	that they are all still running, and that none of them have detected
	an error. */

	if( xAreIntegerMathsTaskStillRunning() != pdTRUE )
	{
		lReturn = ( portLONG ) pdFAIL;
	}

	if( xAreComTestTasksStillRunning() != pdTRUE )
	{
		lReturn = ( portLONG ) pdFAIL;
	}

	if( xArePollingQueuesStillRunning() != pdTRUE )
	{
		lReturn = ( portLONG ) pdFAIL;
	}

	if( xAreMathsTaskStillRunning() != pdTRUE )
	{
		lReturn = ( portLONG ) pdFAIL;
	}

	if( xAreSemaphoreTasksStillRunning() != pdTRUE )
	{
		lReturn = ( portLONG ) pdFAIL;
	}

	if( xAreDynamicPriorityTasksStillRunning() != pdTRUE )
	{
		lReturn = ( portLONG ) pdFAIL;
	}

	if( xAreBlockingQueuesStillRunning() != pdTRUE )
	{
		lReturn = ( portLONG ) pdFAIL;
	}

	if( ulMemCheckTaskCount == mainCOUNT_INITIAL_VALUE )
	{
		/* The vMemCheckTask did not increment the counter - it must
		have failed. */
		lReturn = ( portLONG ) pdFAIL;
	}

	return lReturn;
}
/*-----------------------------------------------------------*/

static void vMemCheckTask( void *pvParameters )
{
unsigned portLONG *pulMemCheckTaskRunningCounter;
void *pvMem1, *pvMem2, *pvMem3;
static portLONG lErrorOccurred = pdFALSE;

	/* This task is dynamically created then deleted during each cycle of the
	vErrorChecks task to check the operation of the memory allocator.  Each time
	the task is created memory is allocated for the stack and TCB.  Each time
	the task is deleted this memory is returned to the heap.  This task itself
	exercises the allocator by allocating and freeing blocks. 
	
	The task executes at the idle priority so does not require a delay. 
	
	pulMemCheckTaskRunningCounter is incremented each cycle to indicate to the
	vErrorChecks() task that this task is still executing without error. */

	pulMemCheckTaskRunningCounter = ( unsigned portLONG * ) pvParameters;

	for( ;; )
	{
		if( lErrorOccurred == pdFALSE )
		{
			/* We have never seen an error so increment the counter. */
			( *pulMemCheckTaskRunningCounter )++;
		}

		/* Allocate some memory - just to give the allocator some extra 
		exercise.  This has to be in a critical section to ensure the
		task does not get deleted while it has memory allocated. */
		vTaskSuspendAll();
		{
			pvMem1 = pvPortMalloc( mainMEM_CHECK_SIZE_1 );
			if( pvMem1 == NULL )
			{
				lErrorOccurred = pdTRUE;
			}
			else
			{
				memset( pvMem1, 0xaa, mainMEM_CHECK_SIZE_1 );
				vPortFree( pvMem1 );
			}
		}
		xTaskResumeAll();

		/* Again - with a different size block. */
		vTaskSuspendAll();
		{
			pvMem2 = pvPortMalloc( mainMEM_CHECK_SIZE_2 );
			if( pvMem2 == NULL )
			{
				lErrorOccurred = pdTRUE;
			}
			else
			{
				memset( pvMem2, 0xaa, mainMEM_CHECK_SIZE_2 );
				vPortFree( pvMem2 );
			}
		}
		xTaskResumeAll();

		/* Again - with a different size block. */
		vTaskSuspendAll();
		{
			pvMem3 = pvPortMalloc( mainMEM_CHECK_SIZE_3 );
			if( pvMem3 == NULL )
			{
				lErrorOccurred = pdTRUE;
			}
			else
			{
				memset( pvMem3, 0xaa, mainMEM_CHECK_SIZE_3 );
				vPortFree( pvMem3 );
			}
		}
		xTaskResumeAll();
	}
}