interrupt.c

FreeRTOS操作系统源码V3.2

/*
	FreeRTOS V3.2.4 - Copyright (C) 2003-2005 Richard Barry.

	This file is part of the FreeRTOS distribution.

	FreeRTOS 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 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; 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, 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.

	***************************************************************************
	See http://www.FreeRTOS.org for documentation, latest information, license 
	and contact details.  Please ensure to read the configuration and relevant 
	port sections of the online documentation.
	***************************************************************************
*/

/* 
Changes from V3.0.0
	+ Added functionality to only call vTaskSwitchContext() once
	  when handling multiple interruptsources in a single interruptcall.

	+ Included Filenames changed to a .c extension to allow stepping through
	  code using F7.

Changes from V3.0.1
*/

#include <pic.h>

/* Scheduler include files. */
#include <FreeRTOS.h>
#include <task.h>
#include <queue.h>

static bit uxSwitchRequested;

/*
 * Vector for the ISR.
 */
void pointed Interrupt()
{
	/*
	 * Save the context of the current task.
	 */
	portSAVE_CONTEXT( portINTERRUPTS_FORCED );

	/*
	 * No contextswitch requested yet
	 */
	uxSwitchRequested	= pdFALSE;
	
	/*
	 * Was the interrupt the FreeRTOS SystemTick?
	 */
	#include <libFreeRTOS/Drivers/Tick/isrTick.c>

/*******************************************************************************
** DO NOT MODIFY ANYTHING ABOVE THIS LINE
********************************************************************************
** Enter the includes for the ISR-code of the FreeRTOS drivers below.
**
** You cannot use local variables. Alternatives are:
** - Use static variables	(Global RAM usage increases)
** - Call a function		(Additional cycles are needed)
** - Use unused SFR's		(preferred, no additional overhead)
** See "../Serial/isrSerialTx.c" for an example of this last option
*******************************************************************************/



	/*
	 * Was the interrupt a byte being received?
	 */
	#include "../Serial/isrSerialRx.c"


	/*
	 * Was the interrupt the Tx register becoming empty?
	 */
	#include "../Serial/isrSerialTx.c"



/*******************************************************************************
** DO NOT MODIFY ANYTHING BELOW THIS LINE
*******************************************************************************/
	/*
	 * Was a contextswitch requested by one of the
	 * interrupthandlers?
	 */
	 if ( uxSwitchRequested )
	 {
	 	vTaskSwitchContext();
	 }
	 
	/*
	 * Restore the context of the (possibly other) task.
	 */
	portRESTORE_CONTEXT();

	#pragma asmline retfie	0
}