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/*
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.
*/
/* Standard includes. */
#include <stdlib.h>
/* Scheduler includes. */
#include "FreeRTOS.h"
#include "task.h"
/* Critical nesting should be initialised to a non zero value so interrupts don't
accidentally get enabled before the scheduler is started. */
#define portINITIAL_CRITICAL_NESTING (( portSTACK_TYPE ) 10)
/* The PSW value assigned to tasks when they start to run for the first time. */
#define portPSW (( portSTACK_TYPE ) 0x00000000)
/* We require the address of the pxCurrentTCB variable, but don't want to know
any details of its type. */
typedef void tskTCB;
extern volatile tskTCB * volatile pxCurrentTCB;
/* Keeps track of the nesting level of critical sections. */
volatile portSTACK_TYPE usCriticalNesting = portINITIAL_CRITICAL_NESTING;
/*-----------------------------------------------------------*/
/* Sets up the timer to generate the tick interrupt. */
static void prvSetupTimerInterrupt( void );
/*-----------------------------------------------------------*/
portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters )
{
*pxTopOfStack = ( portSTACK_TYPE ) pxCode; /* Task function start address */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) pxCode; /* Task function start address */
pxTopOfStack--;
*pxTopOfStack = portPSW; /* Initial PSW value */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x20202020; /* Initial Value of R20 */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x21212121; /* Initial Value of R21 */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x22222222; /* Initial Value of R22 */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x23232323; /* Initial Value of R23 */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x24242424; /* Initial Value of R24 */
pxTopOfStack--;
#if (__DATA_MODEL__ == 0) || (__DATA_MODEL__ == 1)
*pxTopOfStack = ( portSTACK_TYPE ) 0x25252525; /* Initial Value of R25 */
pxTopOfStack--;
#endif /* configDATA_MODE */
*pxTopOfStack = ( portSTACK_TYPE ) 0x26262626; /* Initial Value of R26 */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x27272727; /* Initial Value of R27 */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x28282828; /* Initial Value of R28 */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x29292929; /* Initial Value of R29 */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x30303030; /* Initial Value of R30 */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x19191919; /* Initial Value of R19 */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x18181818; /* Initial Value of R18 */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x17171717; /* Initial Value of R17 */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x16161616; /* Initial Value of R16 */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x15151515; /* Initial Value of R15 */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x14141414; /* Initial Value of R14 */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x13131313; /* Initial Value of R13 */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x12121212; /* Initial Value of R12 */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x11111111; /* Initial Value of R11 */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x10101010; /* Initial Value of R10 */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x99999999; /* Initial Value of R09 */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x88888888; /* Initial Value of R08 */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x77777777; /* Initial Value of R07 */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x66666666; /* Initial Value of R06 */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x55555555; /* Initial Value of R05 */
pxTopOfStack--;
#if __DATA_MODEL__ == 0 || __DATA_MODEL__ == 1
*pxTopOfStack = ( portSTACK_TYPE ) 0x44444444; /* Initial Value of R04 */
pxTopOfStack--;
#endif /* configDATA_MODE */
*pxTopOfStack = ( portSTACK_TYPE ) 0x22222222; /* Initial Value of R02 */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) pvParameters; /* R1 is expected to hold the function parameter*/
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) portNO_CRITICAL_SECTION_NESTING;
/*
* Return a pointer to the top of the stack we have generated so this can
* be stored in the task control block for the task.
*/
return pxTopOfStack;
}
/*-----------------------------------------------------------*/
portBASE_TYPE xPortStartScheduler( void )
{
/* Setup the hardware to generate the tick. Interrupts are disabled when
this function is called. */
prvSetupTimerInterrupt();
/* Restore the context of the first task that is going to run. */
vPortStart();
/* Should not get here as the tasks are now running! */
return pdTRUE;
}
/*-----------------------------------------------------------*/
void vPortEndScheduler( void )
{
/* It is unlikely that the V850ES/Fx3 port will get stopped. If required simply
disable the tick interrupt here. */
}
/*-----------------------------------------------------------*/
/*
* Hardware initialisation to generate the RTOS tick. This uses
*/
static void prvSetupTimerInterrupt( void )
{
TM0CE = 0; /* TMM0 operation disable */
TM0EQMK0 = 1; /* INTTM0EQ0 interrupt disable */
TM0EQIF0 = 0; /* clear INTTM0EQ0 interrupt flag */
/* Set INTTM0EQ0 level 5 priority */
TM0EQIC0 &= 0xF8;
TM0CTL0 = 0x00;
TM0CMP0 = (((configCPU_CLOCK_HZ / configTICK_RATE_HZ) / 2)-1); /* divided by 2 because peripherals only run at CPU_CLOCK/2 */
TM0EQIF0 = 0; /* clear INTTM0EQ0 interrupt flag */
TM0EQMK0 = 0; /* INTTM0EQ0 interrupt enable */
TM0CE = 1; /* TMM0 operation enable */
}
/*-----------------------------------------------------------*/
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