FreeRTOS-Kernel/FreeRTOS/Demo/WIN32-MingW/main.c

/*
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    This file is part of the FreeRTOS distribution.

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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	1

/*
 * 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 );

/* 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 )
{
	/* 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;

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

	taskDISABLE_INTERRUPTS();
	__asm volatile( "int $3" );

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

	taskENABLE_INTERRUPTS();
}
/*-----------------------------------------------------------*/

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" );
	}
}