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; FreeRTOS V5.4.2 - Copyright (C) 2009 Real Time Engineers Ltd.
; 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 exception 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.
; Alternative commercial license and support terms are also available upon
; request. See the licensing section of for full
; license details.
; 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 along
; with FreeRTOS; if not, write to the Free Software Foundation, Inc., 59
; Temple Place, Suite 330, Boston, MA 02111-1307 USA.
; ***************************************************************************
; * *
; * Looking for a quick start? Then check out the FreeRTOS eBook! *
; * See for details *
; * *
; ***************************************************************************
; 1 tab == 4 spaces!
; Please ensure to read the configuration and relevant port sections of the
; online documentation.
; - Documentation, latest information, license and
; contact details.
; - A version that is certified for use in safety
; critical systems.
; - Commercial support, development, porting,
; licensing and training services.
;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.
;/* Interrupt entry must always be in ARM mode. */
; Save the context of the interrupted task.
; Call the C handler function - defined within serial.c.
LDR R0, =vUART_ISRHandler
; 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.