You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
86 lines
3.5 KiB
ArmAsm
86 lines
3.5 KiB
ArmAsm
;/*
|
|
; FreeRTOS.org V5.1.1 - Copyright (C) 2003-2008 Richard Barry.
|
|
;
|
|
; This file is part of the FreeRTOS.org distribution.
|
|
;
|
|
; FreeRTOS.org is free software; you can redistribute it and/or modify
|
|
; it under the terms of the GNU General Public License as published by
|
|
; the Free Software Foundation; either version 2 of the License, or
|
|
; (at your option) any later version.
|
|
;
|
|
; FreeRTOS.org 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.org; if not, write to the Free Software
|
|
; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
;
|
|
; A special exception to the GPL can be applied should you wish to distribute
|
|
; a combined work that includes FreeRTOS.org, without being obliged to provide
|
|
; the source code for any proprietary components. See the licensing section
|
|
; of http://www.FreeRTOS.org for full details of how and when the exception
|
|
; can be applied.
|
|
;
|
|
; ***************************************************************************
|
|
; ***************************************************************************
|
|
; * *
|
|
; * SAVE TIME AND MONEY! We can port FreeRTOS.org to your own hardware, *
|
|
; * and even write all or part of your application on your behalf. *
|
|
; * See http://www.OpenRTOS.com for details of the services we provide to *
|
|
; * expedite your project. *
|
|
; * *
|
|
; ***************************************************************************
|
|
; ***************************************************************************
|
|
;
|
|
; 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
|