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110 lines
4.5 KiB
Plaintext
110 lines
4.5 KiB
Plaintext
;/*
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; FreeRTOS V9.0.0rc1 - Copyright (C) 2016 Real Time Engineers Ltd.
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; All rights reserved
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;
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;
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; ***************************************************************************
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; * *
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; * FreeRTOS tutorial books are available in pdf and paperback. *
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; * Complete, revised, and edited pdf reference manuals are also *
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; * available. *
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; * *
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; * Purchasing FreeRTOS documentation will not only help you, by *
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; * ensuring you get running as quickly as possible and with an *
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; * in-depth knowledge of how to use FreeRTOS, it will also help *
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; * the FreeRTOS project to continue with its mission of providing *
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; * professional grade, cross platform, de facto standard solutions *
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; * for microcontrollers - completely free of charge! *
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; * *
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; * >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
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; * *
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; * Thank you for using FreeRTOS, and thank you for your support! *
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; * *
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; ***************************************************************************
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;
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;
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; This file is part of the FreeRTOS distribution.
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;
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; FreeRTOS is free software; you can redistribute it and/or modify it under
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; the terms of the GNU General Public License (version 2) as published by the
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; Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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; >>>NOTE<<< The modification to the GPL is included to allow you to
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; distribute a combined work that includes FreeRTOS without being obliged to
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; provide the source code for proprietary components outside of the FreeRTOS
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; kernel. FreeRTOS is distributed in the hope that it will be useful, but
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; WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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; or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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; more details. You should have received a copy of the GNU General Public
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; License and the FreeRTOS license exception along with FreeRTOS; if not it
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; can be viewed here: http://www.freertos.org/a00114.html and also obtained
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; by writing to Richard Barry, contact details for whom are available on the
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; FreeRTOS WEB site.
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;
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; 1 tab == 4 spaces!
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;
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; http://www.FreeRTOS.org - Documentation, latest information, license and
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; contact details.
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;
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; http://www.SafeRTOS.com - A version that is certified for use in safety
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; critical systems.
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;
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; http://www.OpenRTOS.com - Commercial support, development, porting,
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; licensing and training services.
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;*/
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#include "ISR_Support.h"
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#define CS 0xFFFFC
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#define ES 0xFFFFD
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PUBLIC vPortYield
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PUBLIC vPortStartFirstTask
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PUBLIC vPortTickISR
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EXTERN vTaskSwitchContext
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EXTERN xTaskIncrementTick
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; FreeRTOS yield handler. This is installed as the BRK software interrupt
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; handler.
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RSEG CODE:CODE
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vPortYield:
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portSAVE_CONTEXT ; Save the context of the current task.
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call vTaskSwitchContext ; Call the scheduler to select the next task.
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portRESTORE_CONTEXT ; Restore the context of the next task to run.
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retb
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; Starts the scheduler by restoring the context of the task that will execute
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; first.
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RSEG CODE:CODE
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vPortStartFirstTask:
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portRESTORE_CONTEXT ; Restore the context of whichever task the ...
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reti ; An interrupt stack frame is used so the task
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; is started using a RETI instruction.
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; FreeRTOS tick handler. This is installed as the interval timer interrupt
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; handler.
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RSEG CODE:CODE
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vPortTickISR:
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portSAVE_CONTEXT ; Save the context of the current task.
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call xTaskIncrementTick ; Call the timer tick function.
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cmpw ax, #0x00
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skz
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call vTaskSwitchContext ; Call the scheduler to select the next task.
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portRESTORE_CONTEXT ; Restore the context of the next task to run.
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reti
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; Install the interrupt handlers
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COMMON INTVEC:CODE:ROOT(1)
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ORG configTICK_VECTOR
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DW vPortTickISR
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COMMON INTVEC:CODE:ROOT(1)
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ORG 126
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DW vPortYield
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END |