| /* | |
| FreeRTOS V8.0.1 - Copyright (C) 2014 Real Time Engineers Ltd. | |
| All rights reserved | |
| VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION. | |
| *************************************************************************** | |
| * * | |
| * FreeRTOS provides completely free yet professionally developed, * | |
| * robust, strictly quality controlled, supported, and cross * | |
| * platform software that has become a de facto standard. * | |
| * * | |
| * Help yourself get started quickly and support the FreeRTOS * | |
| * project by purchasing a FreeRTOS tutorial book, reference * | |
| * manual, or both from: http://www.FreeRTOS.org/Documentation * | |
| * * | |
| * Thank you! * | |
| * * | |
| *************************************************************************** | |
| 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. Full license text is available from the following | |
| link: http://www.freertos.org/a00114.html | |
| 1 tab == 4 spaces! | |
| *************************************************************************** | |
| * * | |
| * Having a problem? Start by reading the FAQ "My application does * | |
| * not run, what could be wrong?" * | |
| * * | |
| * http://www.FreeRTOS.org/FAQHelp.html * | |
| * * | |
| *************************************************************************** | |
| http://www.FreeRTOS.org - Documentation, books, training, latest versions, | |
| license and Real Time Engineers Ltd. contact details. | |
| http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products, | |
| including FreeRTOS+Trace - an indispensable productivity tool, a DOS | |
| compatible FAT file system, and our tiny thread aware UDP/IP stack. | |
| http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High | |
| Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS | |
| licenses offer ticketed support, indemnification and middleware. | |
| http://www.SafeRTOS.com - High Integrity Systems also provide a safety | |
| engineered and independently SIL3 certified version for use in safety and | |
| mission critical applications that require provable dependability. | |
| 1 tab == 4 spaces! | |
| */ | |
| #include "FreeRTOSConfig.h" | |
| #include "portasm.h" | |
| .CODE | |
| /* | |
| * The RTOS tick ISR. | |
| * | |
| * If the cooperative scheduler is in use this simply increments the tick | |
| * count. | |
| * | |
| * If the preemptive scheduler is in use a context switch can also occur. | |
| */ | |
| _vTickISR: | |
| portSAVE_CONTEXT | |
| call #_xTaskIncrementTick | |
| cmp.w #0x00, r15 | |
| jeq _SkipContextSwitch | |
| call #_vTaskSwitchContext | |
| _SkipContextSwitch: | |
| portRESTORE_CONTEXT | |
| /*-----------------------------------------------------------*/ | |
| /* | |
| * Manual context switch called by the portYIELD() macro. | |
| */ | |
| _vPortYield:: | |
| /* Mimic an interrupt by pushing the SR. */ | |
| push SR | |
| /* Now the SR is stacked we can disable interrupts. */ | |
| dint | |
| /* Save the context of the current task. */ | |
| portSAVE_CONTEXT | |
| /* Switch to the highest priority task that is ready to run. */ | |
| call #_vTaskSwitchContext | |
| /* Restore the context of the new task. */ | |
| portRESTORE_CONTEXT | |
| /*-----------------------------------------------------------*/ | |
| /* | |
| * Start off the scheduler by initialising the RTOS tick timer, then restoring | |
| * the context of the first task. | |
| */ | |
| _xPortStartScheduler:: | |
| /* Setup the hardware to generate the tick. Interrupts are disabled | |
| when this function is called. */ | |
| call #_prvSetupTimerInterrupt | |
| /* Restore the context of the first task that is going to run. */ | |
| portRESTORE_CONTEXT | |
| /*-----------------------------------------------------------*/ | |
| /* Place the tick ISR in the correct vector. */ | |
| .VECTORS | |
| .KEEP | |
| ORG TIMERA0_VECTOR | |
| DW _vTickISR | |
| END | |