2 FreeRTOS.org V5.1.2 - Copyright (C) 2003-2009 Richard Barry.
\r
4 This file is part of the FreeRTOS.org distribution.
\r
6 FreeRTOS.org is free software; you can redistribute it and/or modify
\r
7 it under the terms of the GNU General Public License as published by
\r
8 the Free Software Foundation; either version 2 of the License, or
\r
9 (at your option) any later version.
\r
11 FreeRTOS.org is distributed in the hope that it will be useful,
\r
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
\r
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
\r
14 GNU General Public License for more details.
\r
16 You should have received a copy of the GNU General Public License
\r
17 along with FreeRTOS.org; if not, write to the Free Software
\r
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
\r
20 A special exception to the GPL can be applied should you wish to distribute
\r
21 a combined work that includes FreeRTOS.org, without being obliged to provide
\r
22 the source code for any proprietary components. See the licensing section
\r
23 of http://www.FreeRTOS.org for full details of how and when the exception
\r
26 ***************************************************************************
\r
27 ***************************************************************************
\r
29 * Get the FreeRTOS eBook! See http://www.FreeRTOS.org/Documentation *
\r
31 * This is a concise, step by step, 'hands on' guide that describes both *
\r
32 * general multitasking concepts and FreeRTOS specifics. It presents and *
\r
33 * explains numerous examples that are written using the FreeRTOS API. *
\r
34 * Full source code for all the examples is provided in an accompanying *
\r
37 ***************************************************************************
\r
38 ***************************************************************************
\r
40 Please ensure to read the configuration and relevant port sections of the
\r
41 online documentation.
\r
43 http://www.FreeRTOS.org - Documentation, latest information, license and
\r
46 http://www.SafeRTOS.com - A version that is certified for use in safety
\r
49 http://www.OpenRTOS.com - Commercial support, development, porting,
\r
50 licensing and training services.
\r
52 #include "FreeRTOS.h"
\r
55 #define isrCLEAR_EINT_1 2
\r
58 * Interrupt routine that simply wakes vButtonHandlerTask on each interrupt
\r
59 * generated by a push of the built in button. The wrapper takes care of
\r
60 * the ISR entry. This then calls the actual handler function to perform
\r
61 * the work. This work should not be done in the wrapper itself unless
\r
62 * you are absolutely sure that no stack space is used.
\r
64 void vButtonISRWrapper( void ) __attribute__ ((naked));
\r
65 void vButtonHandler( void );
\r
67 void vButtonHandler( void )
\r
69 extern xSemaphoreHandle xButtonSemaphore;
\r
70 portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;
\r
72 xSemaphoreGiveFromISR( xButtonSemaphore, &xHigherPriorityTaskWoken );
\r
74 if( xHigherPriorityTaskWoken )
\r
76 /* We have woken a task. Calling "yield from ISR" here will ensure
\r
77 the interrupt returns to the woken task if it has a priority higher
\r
78 than the interrupted task. */
\r
79 portYIELD_FROM_ISR();
\r
82 EXTINT = isrCLEAR_EINT_1;
\r
85 /*-----------------------------------------------------------*/
\r
87 void vButtonISRWrapper( void )
\r
89 /* Save the context of the interrupted task. */
\r
92 /* Call the handler to do the work. This must be a separate function to
\r
93 the wrapper to ensure the correct stack frame is set up. */
\r
96 /* Restore the context of whichever task is going to run once the interrupt
\r
98 portRESTORE_CONTEXT();
\r