/* | |
FreeRTOS V8.2.1 - Copyright (C) 2015 Real Time Engineers Ltd. | |
All rights reserved | |
VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION. | |
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 modification 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. !<< | |
*************************************************************************** | |
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. Full license text is available on the following | |
link: http://www.freertos.org/a00114.html | |
*************************************************************************** | |
* * | |
* FreeRTOS provides completely free yet professionally developed, * | |
* robust, strictly quality controlled, supported, and cross * | |
* platform software that is more than just the market leader, it * | |
* is the industry's de facto standard. * | |
* * | |
* Help yourself get started quickly while simultaneously helping * | |
* to support the FreeRTOS project by purchasing a FreeRTOS * | |
* tutorial book, reference manual, or both: * | |
* http://www.FreeRTOS.org/Documentation * | |
* * | |
*************************************************************************** | |
http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading | |
the FAQ page "My application does not run, what could be wrong?". Have you | |
defined configASSERT()? | |
http://www.FreeRTOS.org/support - In return for receiving this top quality | |
embedded software for free we request you assist our global community by | |
participating in the support forum. | |
http://www.FreeRTOS.org/training - Investing in training allows your team to | |
be as productive as possible as early as possible. Now you can receive | |
FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers | |
Ltd, and the world's leading authority on the world's leading RTOS. | |
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products, | |
including FreeRTOS+Trace - an indispensable productivity tool, a DOS | |
compatible FAT file system, and our tiny thread aware UDP/IP stack. | |
http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate. | |
Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS. | |
http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High | |
Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS | |
licenses offer ticketed support, indemnification and commercial middleware. | |
http://www.SafeRTOS.com - High Integrity Systems also provide a safety | |
engineered and independently SIL3 certified version for use in safety and | |
mission critical applications that require provable dependability. | |
1 tab == 4 spaces! | |
*/ | |
#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 ) __attribute__ ((noinline)); | |
void vButtonHandler( void ) | |
{ | |
extern SemaphoreHandle_t 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. */ | |
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. */ | |
__asm volatile( "bl vButtonHandler" ); | |
/* Restore the context of whichever task is going to run once the interrupt | |
completes. */ | |
portRESTORE_CONTEXT(); | |
} | |