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Before updating version numbers.

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Richard Barry 2008-03-25 21:09:14 +00:00
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commit 3dfbb349ca
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20080325/Demo/ARM7_LPC2138_Rowley/mainISR.c Normal file
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/*
FreeRTOS.org V4.7.2 - 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.
***************************************************************************
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.
***************************************************************************
*/
#include "FreeRTOS.h"
#include "semphr.h"
#define isrCLEAR_EINT_1 2
/*
* Interrupt routine that simply wakes vButtonHandlerTask on each interrupt
* generated by a push of the built in button. The wrapper takes care of
* the ISR entry. This then calls the actual handler function to perform
* the work. This work should not be done in the wrapper itself unless
* you are absolutely sure that no stack space is used.
*/
void vButtonISRWrapper( void ) __attribute__ ((naked));
void vButtonHandler( void );
void vButtonHandler( void )
{
extern xSemaphoreHandle xButtonSemaphore;
if( xSemaphoreGiveFromISR( xButtonSemaphore, pdFALSE ) )
{
/* We have woken a task. Calling "yield from ISR" here will ensure
the interrupt returns to the woken task if it has a priority higher
than the interrupted task. */
portYIELD_FROM_ISR();
}
EXTINT = isrCLEAR_EINT_1;
VICVectAddr = 0;
}
/*-----------------------------------------------------------*/
void vButtonISRWrapper( void )
{
/* Save the context of the interrupted task. */
portSAVE_CONTEXT();
/* Call the handler to do the work. This must be a separate function to
the wrapper to ensure the correct stack frame is set up. */
vButtonHandler();
/* Restore the context of whichever task is going to run once the interrupt
completes. */
portRESTORE_CONTEXT();
}