path: root/FreeRTOS/Demo/WIN32-MingW/main.c

/*
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    the terms of the GNU General Public License (version 2) as published by the
    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.

    ***************************************************************************
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    >>!   outside of the FreeRTOS kernel.                                   !<<
    ***************************************************************************

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    ***************************************************************************
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*/

/******************************************************************************
 * This project provides two demo applications.  A simple blinky style project,
 * and a more comprehensive test and demo application.  The
 * mainCREATE_SIMPLE_BLINKY_DEMO_ONLY setting is used to select between the two.
 * The simply blinky demo is implemented and described in main_blinky.c.  The
 * more comprehensive test and demo application is implemented and described in
 * main_full.c.
 *
 * This file implements the code that is not demo specific, including the
 * hardware setup and FreeRTOS hook functions.
 *
 *******************************************************************************
 * -NOTE- The Win32 port is a simulation (or is that emulation?) only!  Do not
 * expect to get real time behaviour from the Win32 port or this demo
 * application.  It is provided as a convenient development and demonstration
 * test bed only.  This was tested using Windows XP on a dual core laptop.
 *
 * Windows will not be running the FreeRTOS simulator threads continuously, so
 * the timing information in the FreeRTOS+Trace logs have no meaningful units.
 * See the documentation page for the Windows simulator for an explanation of
 * the slow timing:
 * http://www.freertos.org/FreeRTOS-Windows-Simulator-Emulator-for-Visual-Studio-and-Eclipse-MingW.html
 * - READ THE WEB DOCUMENTATION FOR THIS PORT FOR MORE INFORMATION ON USING IT -
 *******************************************************************************
 *
 */

/* Standard includes. */
#include <stdio.h>
#include <stdlib.h>
#include <conio.h>

/* FreeRTOS kernel includes. */
#include "FreeRTOS.h"
#include "task.h"

/* This project provides two demo applications.  A simple blinky style project,
and a more comprehensive test and demo application.  The
mainCREATE_SIMPLE_BLINKY_DEMO_ONLY setting is used to select between the two.
The simply blinky demo is implemented and described in main_blinky.c.  The more
comprehensive test and demo application is implemented and described in
main_full.c. */
#define mainCREATE_SIMPLE_BLINKY_DEMO_ONLY	0

/* This demo uses heap_5.c, and these constants define the sizes of the regions
that make up the total heap.  This is only done to provide an example of heap_5
being used as this demo could easily create one large heap region instead of
multiple smaller heap regions - in which case heap_4.c would be the more
appropriate choice. */
#define mainREGION_1_SIZE	3001
#define mainREGION_2_SIZE	18105
#define mainREGION_3_SIZE	1107

/*
 * main_blinky() is used when mainCREATE_SIMPLE_BLINKY_DEMO_ONLY is set to 1.
 * main_full() is used when mainCREATE_SIMPLE_BLINKY_DEMO_ONLY is set to 0.
 */
extern void main_blinky( void );
extern void main_full( void );

/*
 * Some of the RTOS hook (callback) functions only need special processing when
 * the full demo is being used.  The simply blinky demo has no special
 * requirements, so these functions are called from the hook functions defined
 * in this file, but are defined in main_full.c.
 */
void vFullDemoTickHookFunction( void );
void vFullDemoIdleFunction( void );

/*
 * This demo uses heap_5.c, so start by defining some heap regions.  This is
 * only done to provide an example as this demo could easily create one large
 * heap region instead of multiple smaller heap regions - in which case heap_4.c
 * would be the more appropriate choice.  No initialisation is required when
 * heap_4.c is used.
 */
static void  prvInitialiseHeap( void );

/*
 * Prototypes for the standard FreeRTOS callback/hook functions implemented
 * within this file.
 */
void vApplicationMallocFailedHook( void );
void vApplicationIdleHook( void );
void vApplicationStackOverflowHook( TaskHandle_t pxTask, char *pcTaskName );
void vApplicationTickHook( void );

/*
 * Writes trace data to a disk file when the trace recording is stopped.
 * This function will simply overwrite any trace files that already exist.
 */
static void prvSaveTraceFile( void );

/* The user trace event posted to the trace recording on each tick interrupt.
Note tick events will not appear in the trace recording with regular period
because this project runs in a Windows simulator, and does not therefore
exhibit deterministic behaviour. */
traceLabel xTickTraceUserEvent;
static portBASE_TYPE xTraceRunning = pdTRUE;

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

int main( void )
{
	/* This demo uses heap_5.c, so start by defining some heap regions.  This
	is only done to provide an example as this demo could easily create one
	large heap region instead of multiple smaller heap regions - in which case
	heap_4.c would be the more appropriate choice.  No initialisation is
	required when heap_4.c is used. */
	prvInitialiseHeap();

	/* Initialise the trace recorder and create the label used to post user
	events to the trace recording on each tick interrupt. */
	vTraceInitTraceData();
	xTickTraceUserEvent = xTraceOpenLabel( "tick" );

	/* Start the trace recording - the recording is written to a file if
	configASSERT() is called. */
	printf( "\r\nTrace started.  Hit a key to dump trace file to disk (does not work from Eclipse console).\r\n" );
	fflush( stdout );
	uiTraceStart();

	/* The mainCREATE_SIMPLE_BLINKY_DEMO_ONLY setting is described at the top
	of this file. */
	#if ( mainCREATE_SIMPLE_BLINKY_DEMO_ONLY == 1 )
	{
		main_blinky();
	}
	#else
	{
		main_full();
	}
	#endif

	return 0;
}
/*-----------------------------------------------------------*/

void vApplicationMallocFailedHook( void )
{
	/* vApplicationMallocFailedHook() will only be called if
	configUSE_MALLOC_FAILED_HOOK is set to 1 in FreeRTOSConfig.h.  It is a hook
	function that will get called if a call to pvPortMalloc() fails.
	pvPortMalloc() is called internally by the kernel whenever a task, queue,
	timer or semaphore is created.  It is also called by various parts of the
	demo application.  If heap_1.c or heap_2.c are used, then the size of the
	heap available to pvPortMalloc() is defined by configTOTAL_HEAP_SIZE in
	FreeRTOSConfig.h, and the xPortGetFreeHeapSize() API function can be used
	to query the size of free heap space that remains (although it does not
	provide information on how the remaining heap might be fragmented). */
	vAssertCalled( __LINE__, __FILE__ );
}
/*-----------------------------------------------------------*/

void vApplicationIdleHook( void )
{
	/* vApplicationIdleHook() will only be called if configUSE_IDLE_HOOK is set
	to 1 in FreeRTOSConfig.h.  It will be called on each iteration of the idle
	task.  It is essential that code added to this hook function never attempts
	to block in any way (for example, call xQueueReceive() with a block time
	specified, or call vTaskDelay()).  If the application makes use of the
	vTaskDelete() API function (as this demo application does) then it is also
	important that vApplicationIdleHook() is permitted to return to its calling
	function, because it is the responsibility of the idle task to clean up
	memory allocated by the kernel to any task that has since been deleted. */

	/* Uncomment the following code to allow the trace to be stopped with any 
	key press.  The code is commented out by default as the kbhit() function
	interferes with the run time behaviour. */
	/* 
		if( _kbhit() != pdFALSE )
		{
			if( xTraceRunning == pdTRUE )
			{
				vTraceStop();
				prvSaveTraceFile();
				xTraceRunning = pdFALSE;
			}
		}
	*/

	#if ( mainCREATE_SIMPLE_BLINKY_DEMO_ONLY != 1 )
	{
		/* Call the idle task processing used by the full demo.  The simple
		blinky demo does not use the idle task hook. */
		vFullDemoIdleFunction();
	}
	#endif
}
/*-----------------------------------------------------------*/

void vApplicationStackOverflowHook( TaskHandle_t pxTask, char *pcTaskName )
{
	( void ) pcTaskName;
	( void ) pxTask;

	/* Run time stack overflow checking is performed if
	configCHECK_FOR_STACK_OVERFLOW is defined to 1 or 2.  This hook
	function is called if a stack overflow is detected. */
	vAssertCalled( __LINE__, __FILE__ );
}
/*-----------------------------------------------------------*/

void vApplicationTickHook( void )
{
	/* This function will be called by each tick interrupt if
	configUSE_TICK_HOOK is set to 1 in FreeRTOSConfig.h.  User code can be
	added here, but the tick hook is called from an interrupt context, so
	code must not attempt to block, and only the interrupt safe FreeRTOS API
	functions can be used (those that end in FromISR()). */

	#if ( mainCREATE_SIMPLE_BLINKY_DEMO_ONLY != 1 )
	{
		vFullDemoTickHookFunction();
	}
	#endif /* mainCREATE_SIMPLE_BLINKY_DEMO_ONLY */

	/* Write a user event to the trace log.
	Note tick events will not appear in the trace recording with regular period
	because this project runs in a Windows simulator, and does not therefore
	exhibit deterministic behaviour.  Windows will run the simulator in
	bursts. */
	vTraceUserEvent( xTickTraceUserEvent );
}
/*-----------------------------------------------------------*/

void vAssertCalled( unsigned long ulLine, const char * const pcFileName )
{
static portBASE_TYPE xPrinted = pdFALSE;
volatile uint32_t ulSetToNonZeroInDebuggerToContinue = 0;

	/* Parameters are not used. */
	( void ) ulLine;
	( void ) pcFileName;

 	taskENTER_CRITICAL();
	{
		/* Stop the trace recording. */
		if( xPrinted == pdFALSE )
		{
			xPrinted = pdTRUE;
			if( xTraceRunning == pdTRUE )
			{
				vTraceStop();
				prvSaveTraceFile();
			}
		}

		/* You can step out of this function to debug the assertion by using
		the debugger to set ulSetToNonZeroInDebuggerToContinue to a non-zero
		value. */
		while( ulSetToNonZeroInDebuggerToContinue == 0 )
		{
			__asm volatile( "NOP" );
			__asm volatile( "NOP" );
		}
	}
	taskEXIT_CRITICAL();
}
/*-----------------------------------------------------------*/

static void prvSaveTraceFile( void )
{
FILE* pxOutputFile;

	pxOutputFile = fopen( "Trace.dump", "wb");

	if( pxOutputFile != NULL )
	{
		fwrite( RecorderDataPtr, sizeof( RecorderDataType ), 1, pxOutputFile );
		fclose( pxOutputFile );
		printf( "\r\nTrace output saved to Trace.dump\r\n" );
	}
	else
	{
		printf( "\r\nFailed to create trace dump file\r\n" );
	}
}
/*-----------------------------------------------------------*/

static void  prvInitialiseHeap( void )
{
/* This demo uses heap_5.c, so start by defining some heap regions.  This is
only done to provide an example as this demo could easily create one large heap
region instead of multiple smaller heap regions - in which case heap_4.c would
be the more appropriate choice.  No initialisation is required when heap_4.c is
used.  The xHeapRegions structure requires the regions to be defined in order,
so this just creates one big array, then populates the structure with offsets
into the array - with gaps in between and messy alignment just for test
purposes. */
static uint8_t ucHeap[ configTOTAL_HEAP_SIZE ];
volatile uint32_t ulAdditionalOffset = 19; /* Just to prevent 'condition is always true' warnings in configASSERT(). */
const HeapRegion_t xHeapRegions[] =
{
	/* Start address with dummy offsets						Size */
	{ ucHeap + 1,											mainREGION_1_SIZE },
	{ ucHeap + 15 + mainREGION_1_SIZE,						mainREGION_2_SIZE },
	{ ucHeap + 19 + mainREGION_1_SIZE + mainREGION_2_SIZE,	mainREGION_3_SIZE },
	{ NULL, 0 }
};

	/* Sanity check that the sizes and offsets defined actually fit into the
	array. */
	configASSERT( ( ulAdditionalOffset + mainREGION_1_SIZE + mainREGION_2_SIZE + mainREGION_3_SIZE ) < configTOTAL_HEAP_SIZE );

	vPortDefineHeapRegions( xHeapRegions );
}
/*-----------------------------------------------------------*/