main.c

FreeRTOS source code as bundled with the book "Using FreeRTOS Real-Time Kernel - A Practical Approac

/*
	FreeRTOS.org V5.0.4 - Copyright (C) 2003-2008 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 as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.

	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 can be applied should you wish 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 of how and when the exception
	can be applied.

    ***************************************************************************
    ***************************************************************************
    *                                                                         *
    * SAVE TIME AND MONEY!  We can port FreeRTOS.org to your own hardware,    *
    * and even write all or part of your application on your behalf.          *
    * See http://www.OpenRTOS.com for details of the services we provide to   *
    * expedite your project.                                                  *
    *                                                                         *
    ***************************************************************************
    ***************************************************************************

	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.
*/

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

/* Demo includes. */
#include "basic_io.h"

/* The two task functions. */
void vTask1( void *pvParameters );
void vTask2( void *pvParameters );

/* Used to hold the handle of Task2. */
xTaskHandle xTask2Handle;

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

int main( void )
{
	/* Create the first task at priority 1.  This time the task parameter is
	not used and is set to NULL.  The task handle is also not used so likewise 
	is also set to NULL. */
	xTaskCreate( vTask1, "Task 1", 1000, NULL, 1, NULL );
          /* The task is created at priority 1 ^. */

	/* Start the scheduler so our tasks start executing. */
	vTaskStartScheduler();	
	
	for( ;; );
	return 0;
}
/*-----------------------------------------------------------*/

void vTask1( void *pvParameters )
{
const portTickType xDelay100ms = 100 / portTICK_RATE_MS;

	for( ;; )
	{
		/* Print out the name of this task. */
		vPrintString( "Task1 is running\r\n" );

		/* Create task 2 at a higher priority.  Again the task parameter is not 
		used so is set to NULL - BUT this time we want to obtain a handle to the 
		task so pass in the address of the xTask2Handle variable. */
		xTaskCreate( vTask2, "Task 2", 1000, NULL, 2, &xTask2Handle );
			 /* The task handle is the last parameter ^^^^^^^^^^^^^ */

		/* Task2 has/had the higher priority, so for Task1 to reach here Task2
		must have already executed and deleted itself.  Delay for 100 
		milliseconds. */
		vTaskDelay( xDelay100ms );
	}
}

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

void vTask2( void *pvParameters )
{
	/* Task2 does nothing but delete itself.  To do this it could call vTaskDelete()
	using a NULL parameter, but instead and purely for demonstration purposes it
	instead calls vTaskDelete() with its own task handle. */
	vPrintString( "Task2 is running and about to delete itself\r\n" );
	vTaskDelete( xTask2Handle );
}
/*-----------------------------------------------------------*/