| ;/* | |
| ; FreeRTOS V8.0.1 - Copyright (C) 2014 Real Time Engineers Ltd. | |
| ; All rights reserved | |
| ; | |
| ; | |
| ; *************************************************************************** | |
| ; * * | |
| ; * FreeRTOS tutorial books are available in pdf and paperback. * | |
| ; * Complete, revised, and edited pdf reference manuals are also * | |
| ; * available. * | |
| ; * * | |
| ; * Purchasing FreeRTOS documentation will not only help you, by * | |
| ; * ensuring you get running as quickly as possible and with an * | |
| ; * in-depth knowledge of how to use FreeRTOS, it will also help * | |
| ; * the FreeRTOS project to continue with its mission of providing * | |
| ; * professional grade, cross platform, de facto standard solutions * | |
| ; * for microcontrollers - completely free of charge! * | |
| ; * * | |
| ; * >>> See http://www.FreeRTOS.org/Documentation for details. <<< * | |
| ; * * | |
| ; * Thank you for using FreeRTOS, and thank you for your support! * | |
| ; * * | |
| ; *************************************************************************** | |
| ; | |
| ; | |
| ; 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 | |
| ; provide the source code for proprietary components outside of the FreeRTOS | |
| ; kernel. 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 and the FreeRTOS license exception along with FreeRTOS; if not it | |
| ; can be viewed here: http://www.freertos.org/a00114.html and also obtained | |
| ; 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 | |
| ; 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 "ISR_Support.h" | |
| #define CS 0xFFFFC | |
| #define ES 0xFFFFD | |
| PUBLIC vPortYield | |
| PUBLIC vPortStartFirstTask | |
| PUBLIC vPortTickISR | |
| EXTERN vTaskSwitchContext | |
| EXTERN xTaskIncrementTick | |
| ; FreeRTOS yield handler. This is installed as the BRK software interrupt | |
| ; handler. | |
| RSEG CODE:CODE | |
| vPortYield: | |
| portSAVE_CONTEXT ; Save the context of the current task. | |
| call vTaskSwitchContext ; Call the scheduler to select the next task. | |
| portRESTORE_CONTEXT ; Restore the context of the next task to run. | |
| retb | |
| ; Starts the scheduler by restoring the context of the task that will execute | |
| ; first. | |
| RSEG CODE:CODE | |
| vPortStartFirstTask: | |
| portRESTORE_CONTEXT ; Restore the context of whichever task the ... | |
| reti ; An interrupt stack frame is used so the task | |
| ; is started using a RETI instruction. | |
| ; FreeRTOS tick handler. This is installed as the interval timer interrupt | |
| ; handler. | |
| RSEG CODE:CODE | |
| vPortTickISR: | |
| portSAVE_CONTEXT ; Save the context of the current task. | |
| call xTaskIncrementTick ; Call the timer tick function. | |
| cmpw ax, #0x00 | |
| skz | |
| call vTaskSwitchContext ; Call the scheduler to select the next task. | |
| portRESTORE_CONTEXT ; Restore the context of the next task to run. | |
| reti | |
| ; Install the interrupt handlers | |
| COMMON INTVEC:CODE:ROOT(1) | |
| ORG configTICK_VECTOR | |
| DW vPortTickISR | |
| COMMON INTVEC:CODE:ROOT(1) | |
| ORG 126 | |
| DW vPortYield | |
| END |