Split The Job

Synch_Time( void )
{
// this function waits for a 5 ms timer to expire
	if (timer_expired)
		loss_of_real_time_error = TRUE;

	while (!timer_expired)
		; // wait

	clear timer interrupt
	restart timer
}

void main( void )
{
	Synch_Time();	// synch to 5ms timer
	// run any functions that must be performed often here

	switch (task)
	{
	// run any functions that don't need to be performed often here
		case TASK_1:
			Service_Application();
			break;

		case TASK_2:
			Service_Sd_Card();
			break;

		case TASK_3:
			Service_Lcd();
			break;

		case TASK_4:
			break;

		case TASK_5:
			break;
	}
	if (++task > TASK_5)
		task = TASK_1;
}

void Service_Lcd( void )
{
	GOLDraw();	// function from Microchip Graphic's library that causes any objects that need to be drawn to actually be drawn
}

void Service_Application( void )
{
#define SPLASH_DISPLAY_TIME		3000/TASK_DELAY_MS	// TASK_DELAY_MS is 25 (each task runs every 25 ms) so this time is 3 seconds
	switch (app_state)
	{
		case APP_STARTUP:
			InitLcd();
			PutImage( (void *)splash_image );
			timer = 0;
			app_state = APP_DISPLAY_SPLASH;
			break;

		case APP_DISPLAY_SPLASH:
			if (++timer == SPLASH_DISPLAY_TIME)
				app_state = APP_CREATE_WIDGETS;
			break;

		case APP_CREATE_WIDGETS:
			StCreate( ..... );
			app_state = APP....;
			break;
		.
		.
		.
	}
}

void main ()
{
	unsigned char filename[40] = "TEST2.TXT";
	unsigned char res, b1;
	unsigned int result;
	unsigned int count_in = 10;
	unsigned int count_back;
	DIR dir;				/* Directory object */
	FIL file1, file2;		/* File object */
	FATFS *fs;

	//result = disk_initialize(0);
    f_mount(0, &fatfs);
	res = f_open(&file1, filename, FA_OPEN_EXISTING | FA_READ); 
    res = f_read(&file1, Buff, count_in, &count_back);
//	res = f_open(&file1, filename, FA_CREATE_ALWAYS | FA_WRITE);
//	res = f_write(&file1, Buff, count_in, &count_back);
	res = f_close(&file1);

}