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; FreeRTOS V8.2.0 - Copyright (C) 2014 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 it can 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"
PUBLIC vANExampleISR_ASM_Wrapper
EXTERN vAnExampleISR_C_Handler
RSEG CODE:CODE
; *
; * 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, an example of how to do this from an assembly file is locate at
; * the bottom of this file.
; *
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
; The interrupt handler can be installed into the vector table in the same
; assembly file.
; Ensure the vector table segement is used.
COMMON INTVEC:CODE:ROOT(1)
;
; Place a pointer to the asm wrapper at the correct index into the vector
; table. Note 56 is used is purely as an example. The correct vector
; number for the interrupt being installed must be used.
ORG 58
DW vANExampleISR_ASM_Wrapper
END
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