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FreeRTOS V5.4.2 - Copyright (C) 2009 Real Time Engineers Ltd.
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 (version 2) as published by the
Free Software Foundation and modified by the FreeRTOS exception.
**NOTE** The exception to the GPL is included to allow you to distribute a
combined work that includes FreeRTOS without being obliged to provide the
source code for proprietary components outside of the FreeRTOS kernel.
Alternative commercial license and support terms are also available upon
request. See the licensing section of for full
license details.
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.
* *
* Looking for a quick start? Then check out the FreeRTOS eBook! *
* See for details *
* *
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Please ensure to read the configuration and relevant port sections of the
online documentation. - Documentation, latest information, license and
contact details. - A version that is certified for use in safety
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#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;
portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;
xSemaphoreGiveFromISR( xButtonSemaphore, &xHigherPriorityTaskWoken );
if( xHigherPriorityTaskWoken )
/* 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. */
VICVectAddr = 0;
void vButtonISRWrapper( void )
/* Save the context of the interrupted task. */
/* 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. */
/* Restore the context of whichever task is going to run once the interrupt
completes. */