;/*
;    FreeRTOS V9.0.0 - Copyright (C) 2016 Real Time Engineers Ltd.
;	
;
;    ***************************************************************************
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;
;
;    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
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;    by writing to Richard Barry, contact details for whom are available on the
;    FreeRTOS WEB site.
;
;    1 tab == 4 spaces!
;
;    http://www.FreeRTOS.org - Documentation, latest information, license and
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;
;    http://www.SafeRTOS.com - A version that is certified for use in safety
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;*/
		
	INCLUDE portmacro.inc
	
	;The UART interrupt entry point is defined within an assembly wrapper
	;within this file.  This takes care of the task context saving before it
	;calls the main handler (vUART_ISRHandler()) which is written in C within
	;serial.c.  The execution of the handler can unblock tasks that were blocked
	;waiting for UART events.  Once the handler completes the asm wrapper 
	;finishes off by	restoring the context of whichever task is now selected to 
	;enter the RUNNING state (which might now be a different task to that which
	;was originally interrupted.
	IMPORT vUART_ISRHandler
	EXPORT vUART_ISREntry

	;/* Interrupt entry must always be in ARM mode. */
	ARM
	AREA	|.text|, CODE, READONLY


vUART_ISREntry

	PRESERVE8

	; Save the context of the interrupted task.
	portSAVE_CONTEXT			

	; Call the C handler function - defined within serial.c.
	LDR R0, =vUART_ISRHandler
	MOV LR, PC				
	BX R0

	; Finish off by restoring the context of the task that has been chosen to 
	; run next - which might be a different task to that which was originally
	; interrupted.
	portRESTORE_CONTEXT

	END