90 lines
3.1 KiB
C
90 lines
3.1 KiB
C
/*
|
|
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();
|
|
}
|
|
|
|
|
|
|