/* | |
FreeRTOS V7.4.0 - Copyright (C) 2013 Real Time Engineers Ltd. | |
FEATURES AND PORTS ARE ADDED TO FREERTOS ALL THE TIME. PLEASE VISIT | |
http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION. | |
*************************************************************************** | |
* * | |
* FreeRTOS tutorial books are available in pdf and paperback. * | |
* Complete, revised, and edited pdf reference manuals are also * | |
* available. * | |
* * | |
* Purchasing FreeRTOS documentation will not only help you, by * | |
* ensuring you get running as quickly as possible and with an * | |
* in-depth knowledge of how to use FreeRTOS, it will also help * | |
* the FreeRTOS project to continue with its mission of providing * | |
* professional grade, cross platform, de facto standard solutions * | |
* for microcontrollers - completely free of charge! * | |
* * | |
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< * | |
* * | |
* Thank you for using FreeRTOS, and thank you for your support! * | |
* * | |
*************************************************************************** | |
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. See the GNU General Public License for more | |
details. You should have received a copy of the GNU General Public License | |
and the FreeRTOS license exception along with FreeRTOS; if not itcan be | |
viewed here: http://www.freertos.org/a00114.html and also obtained by | |
writing to Real Time Engineers Ltd., contact details for whom are available | |
on the FreeRTOS WEB site. | |
1 tab == 4 spaces! | |
*************************************************************************** | |
* * | |
* Having a problem? Start by reading the FAQ "My application does * | |
* not run, what could be wrong?" * | |
* * | |
* http://www.FreeRTOS.org/FAQHelp.html * | |
* * | |
*************************************************************************** | |
http://www.FreeRTOS.org - Documentation, books, training, latest versions, | |
license and Real Time Engineers Ltd. contact details. | |
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products, | |
including FreeRTOS+Trace - an indispensable productivity tool, and our new | |
fully thread aware and reentrant UDP/IP stack. | |
http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High | |
Integrity Systems, who sell the code with commercial support, | |
indemnification and middleware, under the OpenRTOS brand. | |
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. | |
*/ | |
/* | |
* This file defines the assembler wrapper for the example interrupt that is | |
* defined in main.c. The wrapper is the interrupt entry point. | |
*/ | |
/* ISR_Support.h contains the definitions of portSAVE_CONTEXT() and | |
portRESTORE_CONTEXT(). */ | |
#include "ISR_Support.h" | |
.global _vANExampleISR_ASM_Wrapper | |
.extern _vAnExampleISR_C_Handler | |
.text | |
/* | |
* This demo does not include a functional interrupt service routine - so | |
* this dummy handler (which is not actually installed) is provided as an | |
* example of how an ISR that needs to cause a context switch needs to be | |
* implemented. ISRs that do not cause a context switch have no special | |
* requirements and can be written as per the compiler documentation. | |
* | |
* This assembly wrapper function calls the main handler, which is called | |
* vAnExampleISR_C_Handler(), and is implemented in main.c. See the | |
* documentation page for this demo on the FreeRTOS.org website for full | |
* instructions. | |
* | |
* NOTE: vANExampleISR_ASM_Wrapper needs to be installed into the relevant | |
* vector within vector_table.c. | |
*/ | |
vANExampleISR_ASM_Wrapper: | |
/* portSAVE_CONTEXT() must be the first thing called in the ASM | |
wrapper. */ | |
portSAVE_CONTEXT | |
/* Once the context has been saved the C handler can be called. */ | |
call !!_vAnExampleISR_C_Handler | |
/* Finally the ISR must end with a call to portRESTORE_CONTEXT() | |
followed by a reti instruction to return from the interrupt to whichever | |
task is now the task selected to run (which may be different to the task | |
that was running before the interrupt started). */ | |
portRESTORE_CONTEXT | |
reti | |
.end | |