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Richard Barry 2010-09-23 18:11:20 +00:00
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316
20100923-V6.1.0-RC2/Source/portable/MPLAB/PIC24_dsPIC/port.c Normal file
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/*
FreeRTOS V6.1.0 - Copyright (C) 2010 Real Time Engineers Ltd.
***************************************************************************
* *
* If you are: *
* *
* + New to FreeRTOS, *
* + Wanting to learn FreeRTOS or multitasking in general quickly *
* + Looking for basic training, *
* + Wanting to improve your FreeRTOS skills and productivity *
* *
* then take a look at the FreeRTOS books - available as PDF or paperback *
* *
* "Using the FreeRTOS Real Time Kernel - a Practical Guide" *
* http://www.FreeRTOS.org/Documentation *
* *
* A pdf reference manual is also available. Both are usually delivered *
* to your inbox within 20 minutes to two hours when purchased between 8am *
* and 8pm GMT (although please allow up to 24 hours in case of *
* exceptional circumstances). 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 exception 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.
*/
/*
Changes from V4.2.1
+ Introduced the configKERNEL_INTERRUPT_PRIORITY definition.
*/
/*-----------------------------------------------------------
* Implementation of functions defined in portable.h for the PIC24 port.
*----------------------------------------------------------*/
/* Scheduler include files. */
#include "FreeRTOS.h"
#include "task.h"
/* Hardware specifics. */
#define portBIT_SET 1
#define portTIMER_PRESCALE 8
#define portINITIAL_SR 0
/* Defined for backward compatability with project created prior to
FreeRTOS.org V4.3.0. */
#ifndef configKERNEL_INTERRUPT_PRIORITY
#define configKERNEL_INTERRUPT_PRIORITY 1
#endif
/* The program counter is only 23 bits. */
#define portUNUSED_PR_BITS 0x7f
/* Records the nesting depth of calls to portENTER_CRITICAL(). */
unsigned portBASE_TYPE uxCriticalNesting = 0xef;
#if configKERNEL_INTERRUPT_PRIORITY != 1
#error If configKERNEL_INTERRUPT_PRIORITY is not 1 then the #32 in the following macros needs changing to equal the portINTERRUPT_BITS value, which is ( configKERNEL_INTERRUPT_PRIORITY << 5 )
#endif
#ifdef MPLAB_PIC24_PORT
#define portRESTORE_CONTEXT() \
asm volatile( "MOV _pxCurrentTCB, W0 \n" /* Restore the stack pointer for the task. */ \
"MOV [W0], W15 \n" \
"POP W0 \n" /* Restore the critical nesting counter for the task. */ \
"MOV W0, _uxCriticalNesting \n" \
"POP PSVPAG \n" \
"POP CORCON \n" \
"POP TBLPAG \n" \
"POP RCOUNT \n" /* Restore the registers from the stack. */ \
"POP W14 \n" \
"POP.D W12 \n" \
"POP.D W10 \n" \
"POP.D W8 \n" \
"POP.D W6 \n" \
"POP.D W4 \n" \
"POP.D W2 \n" \
"POP.D W0 \n" \
"POP SR " );
#endif /* MPLAB_PIC24_PORT */
#ifdef MPLAB_DSPIC_PORT
#define portRESTORE_CONTEXT() \
asm volatile( "MOV _pxCurrentTCB, W0 \n" /* Restore the stack pointer for the task. */ \
"MOV [W0], W15 \n" \
"POP W0 \n" /* Restore the critical nesting counter for the task. */ \
"MOV W0, _uxCriticalNesting \n" \
"POP PSVPAG \n" \
"POP CORCON \n" \
"POP DOENDH \n" \
"POP DOENDL \n" \
"POP DOSTARTH \n" \
"POP DOSTARTL \n" \
"POP DCOUNT \n" \
"POP ACCBU \n" \
"POP ACCBH \n" \
"POP ACCBL \n" \
"POP ACCAU \n" \
"POP ACCAH \n" \
"POP ACCAL \n" \
"POP TBLPAG \n" \
"POP RCOUNT \n" /* Restore the registers from the stack. */ \
"POP W14 \n" \
"POP.D W12 \n" \
"POP.D W10 \n" \
"POP.D W8 \n" \
"POP.D W6 \n" \
"POP.D W4 \n" \
"POP.D W2 \n" \
"POP.D W0 \n" \
"POP SR " );
#endif /* MPLAB_DSPIC_PORT */
/*
* Setup the timer used to generate the tick interrupt.
*/
static void prvSetupTimerInterrupt( void );
/*
* See header file for description.
*/
portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters )
{
unsigned short usCode;
portBASE_TYPE i;
const portSTACK_TYPE xInitialStack[] =
{
0x1111, /* W1 */
0x2222, /* W2 */
0x3333, /* W3 */
0x4444, /* W4 */
0x5555, /* W5 */
0x6666, /* W6 */
0x7777, /* W7 */
0x8888, /* W8 */
0x9999, /* W9 */
0xaaaa, /* W10 */
0xbbbb, /* W11 */
0xcccc, /* W12 */
0xdddd, /* W13 */
0xeeee, /* W14 */
0xcdce, /* RCOUNT */
0xabac, /* TBLPAG */
/* dsPIC specific registers. */
#ifdef MPLAB_DSPIC_PORT
0x0202, /* ACCAL */
0x0303, /* ACCAH */
0x0404, /* ACCAU */
0x0505, /* ACCBL */
0x0606, /* ACCBH */
0x0707, /* ACCBU */
0x0808, /* DCOUNT */
0x090a, /* DOSTARTL */
0x1010, /* DOSTARTH */
0x1110, /* DOENDL */
0x1212, /* DOENDH */
#endif
};
/* Setup the stack as if a yield had occurred.
Save the low bytes of the program counter. */
usCode = ( unsigned short ) pxCode;
*pxTopOfStack = ( portSTACK_TYPE ) usCode;
pxTopOfStack++;
/* Save the high byte of the program counter. This will always be zero
here as it is passed in a 16bit pointer. If the address is greater than
16 bits then the pointer will point to a jump table. */
*pxTopOfStack = ( portSTACK_TYPE ) 0;
pxTopOfStack++;
/* Status register with interrupts enabled. */
*pxTopOfStack = portINITIAL_SR;
pxTopOfStack++;
/* Parameters are passed in W0. */
*pxTopOfStack = ( portSTACK_TYPE ) pvParameters;
pxTopOfStack++;
for( i = 0; i < ( sizeof( xInitialStack ) / sizeof( portSTACK_TYPE ) ); i++ )
{
*pxTopOfStack = xInitialStack[ i ];
pxTopOfStack++;
}
*pxTopOfStack = CORCON;
pxTopOfStack++;
*pxTopOfStack = PSVPAG;
pxTopOfStack++;
/* Finally the critical nesting depth. */
*pxTopOfStack = 0x00;
pxTopOfStack++;
return pxTopOfStack;
}
/*-----------------------------------------------------------*/
portBASE_TYPE xPortStartScheduler( void )
{
/* Setup a timer for the tick ISR. */
prvSetupTimerInterrupt();
/* Restore the context of the first task to run. */
portRESTORE_CONTEXT();
/* Simulate the end of the yield function. */
asm volatile ( "return" );
/* Should not reach here. */
return pdTRUE;
}
/*-----------------------------------------------------------*/
void vPortEndScheduler( void )
{
/* It is unlikely that the scheduler for the PIC port will get stopped
once running. If required disable the tick interrupt here, then return
to xPortStartScheduler(). */
}
/*-----------------------------------------------------------*/
/*
* Setup a timer for a regular tick.
*/
static void prvSetupTimerInterrupt( void )
{
const unsigned long ulCompareMatch = ( ( configCPU_CLOCK_HZ / portTIMER_PRESCALE ) / configTICK_RATE_HZ ) - 1;
/* Prescale of 8. */
T1CON = 0;
TMR1 = 0;
PR1 = ( unsigned short ) ulCompareMatch;
/* Setup timer 1 interrupt priority. */
IPC0bits.T1IP = configKERNEL_INTERRUPT_PRIORITY;
/* Clear the interrupt as a starting condition. */
IFS0bits.T1IF = 0;
/* Enable the interrupt. */
IEC0bits.T1IE = 1;
/* Setup the prescale value. */
T1CONbits.TCKPS0 = 1;
T1CONbits.TCKPS1 = 0;
/* Start the timer. */
T1CONbits.TON = 1;
}
/*-----------------------------------------------------------*/
void vPortEnterCritical( void )
{
portDISABLE_INTERRUPTS();
uxCriticalNesting++;
}
/*-----------------------------------------------------------*/
void vPortExitCritical( void )
{
uxCriticalNesting--;
if( uxCriticalNesting == 0 )
{
portENABLE_INTERRUPTS();
}
}
/*-----------------------------------------------------------*/
void __attribute__((__interrupt__, auto_psv)) _T1Interrupt( void )
{
/* Clear the timer interrupt. */
IFS0bits.T1IF = 0;
vTaskIncrementTick();
#if configUSE_PREEMPTION == 1
portYIELD();
#endif
}

104
20100923-V6.1.0-RC2/Source/portable/MPLAB/PIC24_dsPIC/portasm_PIC24.S Normal file
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/*
FreeRTOS V6.1.0 - Copyright (C) 2010 Real Time Engineers Ltd.
***************************************************************************
* *
* If you are: *
* *
* + New to FreeRTOS, *
* + Wanting to learn FreeRTOS or multitasking in general quickly *
* + Looking for basic training, *
* + Wanting to improve your FreeRTOS skills and productivity *
* *
* then take a look at the FreeRTOS books - available as PDF or paperback *
* *
* "Using the FreeRTOS Real Time Kernel - a Practical Guide" *
* http://www.FreeRTOS.org/Documentation *
* *
* A pdf reference manual is also available. Both are usually delivered *
* to your inbox within 20 minutes to two hours when purchased between 8am *
* and 8pm GMT (although please allow up to 24 hours in case of *
* exceptional circumstances). 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 exception 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.
*/
.global _vPortYield
.extern _vTaskSwitchContext
.extern uxCriticalNesting
_vPortYield:
PUSH SR /* Save the SR used by the task.... */
PUSH W0 /* ....then disable interrupts. */
MOV #32, W0
MOV W0, SR
PUSH W1 /* Save registers to the stack. */
PUSH.D W2
PUSH.D W4
PUSH.D W6
PUSH.D W8
PUSH.D W10
PUSH.D W12
PUSH W14
PUSH RCOUNT
PUSH TBLPAG
PUSH CORCON
PUSH PSVPAG
MOV _uxCriticalNesting, W0 /* Save the critical nesting counter for the task. */
PUSH W0
MOV _pxCurrentTCB, W0 /* Save the new top of stack into the TCB. */
MOV W15, [W0]
call _vTaskSwitchContext
MOV _pxCurrentTCB, W0 /* Restore the stack pointer for the task. */
MOV [W0], W15
POP W0 /* Restore the critical nesting counter for the task. */
MOV W0, _uxCriticalNesting
POP PSVPAG
POP CORCON
POP TBLPAG
POP RCOUNT /* Restore the registers from the stack. */
POP W14
POP.D W12
POP.D W10
POP.D W8
POP.D W6
POP.D W4
POP.D W2
POP.D W0
POP SR
return
.end

127
20100923-V6.1.0-RC2/Source/portable/MPLAB/PIC24_dsPIC/portasm_dsPIC.S Normal file
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/*
FreeRTOS V6.1.0 - Copyright (C) 2010 Real Time Engineers Ltd.
***************************************************************************
* *
* If you are: *
* *
* + New to FreeRTOS, *
* + Wanting to learn FreeRTOS or multitasking in general quickly *
* + Looking for basic training, *
* + Wanting to improve your FreeRTOS skills and productivity *
* *
* then take a look at the FreeRTOS books - available as PDF or paperback *
* *
* "Using the FreeRTOS Real Time Kernel - a Practical Guide" *
* http://www.FreeRTOS.org/Documentation *
* *
* A pdf reference manual is also available. Both are usually delivered *
* to your inbox within 20 minutes to two hours when purchased between 8am *
* and 8pm GMT (although please allow up to 24 hours in case of *
* exceptional circumstances). 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 exception 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.
*/
.global _vPortYield
.extern _vTaskSwitchContext
.extern uxCriticalNesting
_vPortYield:
PUSH SR /* Save the SR used by the task.... */
PUSH W0 /* ....then disable interrupts. */
MOV #32, W0
MOV W0, SR
PUSH W1 /* Save registers to the stack. */
PUSH.D W2
PUSH.D W4
PUSH.D W6
PUSH.D W8
PUSH.D W10
PUSH.D W12
PUSH W14
PUSH RCOUNT
PUSH TBLPAG
PUSH ACCAL
PUSH ACCAH
PUSH ACCAU
PUSH ACCBL
PUSH ACCBH
PUSH ACCBU
PUSH DCOUNT
PUSH DOSTARTL
PUSH DOSTARTH
PUSH DOENDL
PUSH DOENDH
PUSH CORCON
PUSH PSVPAG
MOV _uxCriticalNesting, W0 /* Save the critical nesting counter for the task. */
PUSH W0
MOV _pxCurrentTCB, W0 /* Save the new top of stack into the TCB. */
MOV W15, [W0]
call _vTaskSwitchContext
MOV _pxCurrentTCB, W0 /* Restore the stack pointer for the task. */
MOV [W0], W15
POP W0 /* Restore the critical nesting counter for the task. */
MOV W0, _uxCriticalNesting
POP PSVPAG
POP CORCON
POP DOENDH
POP DOENDL
POP DOSTARTH
POP DOSTARTL
POP DCOUNT
POP ACCBU
POP ACCBH
POP ACCBL
POP ACCAU
POP ACCAH
POP ACCAL
POP TBLPAG
POP RCOUNT /* Restore the registers from the stack. */
POP W14
POP.D W12
POP.D W10
POP.D W8
POP.D W6
POP.D W4
POP.D W2
POP.D W0
POP SR
return
.end

132
20100923-V6.1.0-RC2/Source/portable/MPLAB/PIC24_dsPIC/portmacro.h Normal file
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/*
FreeRTOS V6.1.0 - Copyright (C) 2010 Real Time Engineers Ltd.
***************************************************************************
* *
* If you are: *
* *
* + New to FreeRTOS, *
* + Wanting to learn FreeRTOS or multitasking in general quickly *
* + Looking for basic training, *
* + Wanting to improve your FreeRTOS skills and productivity *
* *
* then take a look at the FreeRTOS books - available as PDF or paperback *
* *
* "Using the FreeRTOS Real Time Kernel - a Practical Guide" *
* http://www.FreeRTOS.org/Documentation *
* *
* A pdf reference manual is also available. Both are usually delivered *
* to your inbox within 20 minutes to two hours when purchased between 8am *
* and 8pm GMT (although please allow up to 24 hours in case of *
* exceptional circumstances). 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 exception 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.
*/
#ifndef PORTMACRO_H
#define PORTMACRO_H
#ifdef __cplusplus
extern "C" {
#endif
/*-----------------------------------------------------------
* Port specific definitions.
*
* The settings in this file configure FreeRTOS correctly for the
* given hardware and compiler.
*
* These settings should not be altered.
*-----------------------------------------------------------
*/
/* Type definitions. */
#define portCHAR char
#define portFLOAT float
#define portDOUBLE double
#define portLONG long
#define portSHORT short
#define portSTACK_TYPE unsigned short
#define portBASE_TYPE short
#if( configUSE_16_BIT_TICKS == 1 )
typedef unsigned portSHORT portTickType;
#define portMAX_DELAY ( portTickType ) 0xffff
#else
typedef unsigned portLONG portTickType;
#define portMAX_DELAY ( portTickType ) 0xffffffff
#endif
/*-----------------------------------------------------------*/
/* Hardware specifics. */
#define portBYTE_ALIGNMENT 2
#define portSTACK_GROWTH 1
#define portTICK_RATE_MS ( ( portTickType ) 1000 / configTICK_RATE_HZ )
/*-----------------------------------------------------------*/
/* Critical section management. */
#define portINTERRUPT_BITS ( ( unsigned portSHORT ) configKERNEL_INTERRUPT_PRIORITY << ( unsigned portSHORT ) 5 )
#define portDISABLE_INTERRUPTS() SR |= portINTERRUPT_BITS
#define portENABLE_INTERRUPTS() SR &= ~portINTERRUPT_BITS
/* Note that exiting a critical sectino will set the IPL bits to 0, nomatter
what their value was prior to entering the critical section. */
extern void vPortEnterCritical( void );
extern void vPortExitCritical( void );
#define portENTER_CRITICAL() vPortEnterCritical()
#define portEXIT_CRITICAL() vPortExitCritical()
/*-----------------------------------------------------------*/
/* Task utilities. */
extern void vPortYield( void );
#define portYIELD() asm volatile ( "CALL _vPortYield \n" \
"NOP " );
/*-----------------------------------------------------------*/
/* Task function macros as described on the FreeRTOS.org WEB site. */
#define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters )
#define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters )
/*-----------------------------------------------------------*/
/* Required by the kernel aware debugger. */
#ifdef __DEBUG
#define portREMOVE_STATIC_QUALIFIER
#endif
#define portNOP() asm volatile ( "NOP" )
#ifdef __cplusplus
}
#endif
#endif /* PORTMACRO_H */