|
|
|
|
;/*
|
|
|
|
|
; FreeRTOS V5.4.1 - 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 http://www.FreeRTOS.org 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 http://www.FreeRTOS.org/Documentation for details *
|
|
|
|
|
; * *
|
|
|
|
|
; ***************************************************************************
|
|
|
|
|
;
|
|
|
|
|
; 1 tab == 4 spaces!
|
|
|
|
|
;
|
|
|
|
|
; Please ensure to read the configuration and relevant port sections of the
|
|
|
|
|
; online documentation.
|
|
|
|
|
;
|
|
|
|
|
; http://www.FreeRTOS.org - Documentation, latest information, license and
|
|
|
|
|
; contact details.
|
|
|
|
|
;
|
|
|
|
|
; http://www.SafeRTOS.com - A version that is certified for use in safety
|
|
|
|
|
; critical systems.
|
|
|
|
|
;
|
|
|
|
|
; http://www.OpenRTOS.com - Commercial support, development, porting,
|
|
|
|
|
; licensing and training services.
|
|
|
|
|
;*/
|
|
|
|
|
|
|
|
|
|
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
|
