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222 lines
9.5 KiB
C
222 lines
9.5 KiB
C
/*
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FreeRTOS V8.0.0:rc1 - Copyright (C) 2014 Real Time Engineers Ltd.
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All rights reserved
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VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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***************************************************************************
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* *
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* FreeRTOS provides completely free yet professionally developed, *
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* robust, strictly quality controlled, supported, and cross *
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* platform software that has become a de facto standard. *
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* *
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* Help yourself get started quickly and support the FreeRTOS *
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* project by purchasing a FreeRTOS tutorial book, reference *
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* manual, or both from: http://www.FreeRTOS.org/Documentation *
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* *
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* Thank you! *
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* *
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***************************************************************************
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This file is part of the FreeRTOS distribution.
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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 distribute
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>>! a combined work that includes FreeRTOS without being obliged to provide
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>>! the source code for proprietary components outside of the FreeRTOS
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>>! kernel.
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FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. Full license text is available from the following
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link: http://www.freertos.org/a00114.html
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1 tab == 4 spaces!
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***************************************************************************
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* *
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* Having a problem? Start by reading the FAQ "My application does *
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* not run, what could be wrong?" *
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* *
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* http://www.FreeRTOS.org/FAQHelp.html *
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* *
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***************************************************************************
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http://www.FreeRTOS.org - Documentation, books, training, latest versions,
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license and Real Time Engineers Ltd. contact details.
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http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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including FreeRTOS+Trace - an indispensable productivity tool, a DOS
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compatible FAT file system, and our tiny thread aware UDP/IP stack.
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http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
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Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS
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licenses offer ticketed support, indemnification and middleware.
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http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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engineered and independently SIL3 certified version for use in safety and
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mission critical applications that require provable dependability.
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1 tab == 4 spaces!
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*/
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/* Standard includes. */
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#include <stdlib.h>
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/* Scheduler includes. */
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#include "FreeRTOS.h"
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#include "task.h"
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/* Critical nesting should be initialised to a non zero value so interrupts don't
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accidentally get enabled before the scheduler is started. */
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#define portINITIAL_CRITICAL_NESTING (( StackType_t ) 10)
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/* The PSW value assigned to tasks when they start to run for the first time. */
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#define portPSW (( StackType_t ) 0x00000000)
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/* We require the address of the pxCurrentTCB variable, but don't want to know
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any details of its type. */
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typedef void TCB_t;
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extern volatile TCB_t * volatile pxCurrentTCB;
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/* Keeps track of the nesting level of critical sections. */
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volatile StackType_t usCriticalNesting = portINITIAL_CRITICAL_NESTING;
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/*-----------------------------------------------------------*/
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/* Sets up the timer to generate the tick interrupt. */
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static void prvSetupTimerInterrupt( void );
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/*-----------------------------------------------------------*/
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StackType_t *pxPortInitialiseStack( StackType_t *pxTopOfStack, TaskFunction_t pxCode, void *pvParameters )
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{
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*pxTopOfStack = ( StackType_t ) pxCode; /* Task function start address */
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) pxCode; /* Task function start address */
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pxTopOfStack--;
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*pxTopOfStack = portPSW; /* Initial PSW value */
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x20202020; /* Initial Value of R20 */
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x21212121; /* Initial Value of R21 */
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x22222222; /* Initial Value of R22 */
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x23232323; /* Initial Value of R23 */
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x24242424; /* Initial Value of R24 */
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pxTopOfStack--;
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#if (__DATA_MODEL__ == 0) || (__DATA_MODEL__ == 1)
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*pxTopOfStack = ( StackType_t ) 0x25252525; /* Initial Value of R25 */
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pxTopOfStack--;
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#endif /* configDATA_MODE */
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*pxTopOfStack = ( StackType_t ) 0x26262626; /* Initial Value of R26 */
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x27272727; /* Initial Value of R27 */
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x28282828; /* Initial Value of R28 */
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x29292929; /* Initial Value of R29 */
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x30303030; /* Initial Value of R30 */
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x19191919; /* Initial Value of R19 */
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x18181818; /* Initial Value of R18 */
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x17171717; /* Initial Value of R17 */
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x16161616; /* Initial Value of R16 */
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x15151515; /* Initial Value of R15 */
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x14141414; /* Initial Value of R14 */
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x13131313; /* Initial Value of R13 */
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x12121212; /* Initial Value of R12 */
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x11111111; /* Initial Value of R11 */
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x10101010; /* Initial Value of R10 */
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x99999999; /* Initial Value of R09 */
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x88888888; /* Initial Value of R08 */
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x77777777; /* Initial Value of R07 */
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x66666666; /* Initial Value of R06 */
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x55555555; /* Initial Value of R05 */
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pxTopOfStack--;
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#if __DATA_MODEL__ == 0 || __DATA_MODEL__ == 1
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*pxTopOfStack = ( StackType_t ) 0x44444444; /* Initial Value of R04 */
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pxTopOfStack--;
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#endif /* configDATA_MODE */
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*pxTopOfStack = ( StackType_t ) 0x22222222; /* Initial Value of R02 */
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) pvParameters; /* R1 is expected to hold the function parameter*/
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) portNO_CRITICAL_SECTION_NESTING;
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/*
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* Return a pointer to the top of the stack we have generated so this can
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* be stored in the task control block for the task.
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*/
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return pxTopOfStack;
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}
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/*-----------------------------------------------------------*/
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BaseType_t xPortStartScheduler( void )
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{
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/* Setup the hardware to generate the tick. Interrupts are disabled when
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this function is called. */
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prvSetupTimerInterrupt();
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/* Restore the context of the first task that is going to run. */
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vPortStart();
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/* Should not get here as the tasks are now running! */
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return pdTRUE;
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}
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/*-----------------------------------------------------------*/
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void vPortEndScheduler( void )
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{
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/* It is unlikely that the V850ES/Fx3 port will get stopped. If required simply
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disable the tick interrupt here. */
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}
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/*-----------------------------------------------------------*/
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/*
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* Hardware initialisation to generate the RTOS tick. This uses
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*/
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static void prvSetupTimerInterrupt( void )
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{
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TM0CE = 0; /* TMM0 operation disable */
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TM0EQMK0 = 1; /* INTTM0EQ0 interrupt disable */
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TM0EQIF0 = 0; /* clear INTTM0EQ0 interrupt flag */
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#ifdef __IAR_V850ES_Fx3__
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{
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TM0CMP0 = (((configCPU_CLOCK_HZ / configTICK_RATE_HZ) / 2)-1); /* divided by 2 because peripherals only run at CPU_CLOCK/2 */
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}
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#else
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{
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TM0CMP0 = (configCPU_CLOCK_HZ / configTICK_RATE_HZ);
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}
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#endif
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TM0EQIC0 &= 0xF8;
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TM0CTL0 = 0x00;
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TM0EQIF0 = 0; /* clear INTTM0EQ0 interrupt flag */
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TM0EQMK0 = 0; /* INTTM0EQ0 interrupt enable */
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TM0CE = 1; /* TMM0 operation enable */
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}
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/*-----------------------------------------------------------*/
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