Add MSP430X CCS4 port layer.
Richard Barry
14 years ago
parent
2cf5546e11
commit
a6132cbbad
@ -0,0 +1,188 @@
|
||||
/*
|
||||
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.
|
||||
*/
|
||||
|
||||
/* Scheduler includes. */
|
||||
#include "FreeRTOS.h"
|
||||
#include "task.h"
|
||||
|
||||
/*-----------------------------------------------------------
|
||||
* Implementation of functions defined in portable.h for the MSP430X port.
|
||||
*----------------------------------------------------------*/
|
||||
|
||||
/* Constants required for hardware setup. The tick ISR runs off the ACLK,
|
||||
not the MCLK. */
|
||||
#define portACLK_FREQUENCY_HZ ( ( portTickType ) 32768 )
|
||||
#define portINITIAL_CRITICAL_NESTING ( ( unsigned short ) 10 )
|
||||
#define portFLAGS_INT_ENABLED ( ( portSTACK_TYPE ) 0x08 )
|
||||
|
||||
/* 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;
|
||||
|
||||
/* Each task maintains a count of the critical section nesting depth. Each
|
||||
time a critical section is entered the count is incremented. Each time a
|
||||
critical section is exited the count is decremented - with interrupts only
|
||||
being re-enabled if the count is zero.
|
||||
|
||||
usCriticalNesting will get set to zero when the scheduler starts, but must
|
||||
not be initialised to zero as this will cause problems during the startup
|
||||
sequence. */
|
||||
volatile unsigned short usCriticalNesting = portINITIAL_CRITICAL_NESTING;
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
|
||||
/*
|
||||
* Sets up the periodic ISR used for the RTOS tick. This uses timer 0, but
|
||||
* could have alternatively used the watchdog timer or timer 1.
|
||||
*/
|
||||
void vPortSetupTimerInterrupt( void );
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/*
|
||||
* Initialise the stack of a task to look exactly as if a call to
|
||||
* portSAVE_CONTEXT had been called.
|
||||
*
|
||||
* See the header file portable.h.
|
||||
*/
|
||||
portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters )
|
||||
{
|
||||
unsigned short *pusTopOfStack;
|
||||
|
||||
/*
|
||||
Place a few bytes of known values on the bottom of the stack.
|
||||
This is just useful for debugging and can be included if required.
|
||||
|
||||
*pxTopOfStack = ( portSTACK_TYPE ) 0x1111;
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( portSTACK_TYPE ) 0x2222;
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( portSTACK_TYPE ) 0x3333;
|
||||
pxTopOfStack--;
|
||||
*/
|
||||
|
||||
*pxTopOfStack = ( portSTACK_TYPE ) pxCode;
|
||||
pusTopOfStack = ( unsigned short * ) pxTopOfStack;
|
||||
pusTopOfStack--;
|
||||
*pusTopOfStack = portFLAGS_INT_ENABLED;
|
||||
pusTopOfStack -= 2;
|
||||
pxTopOfStack = ( portSTACK_TYPE * ) pusTopOfStack;
|
||||
|
||||
/* Next the general purpose registers. */
|
||||
*pxTopOfStack = ( portSTACK_TYPE ) 0xffffff;
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( portSTACK_TYPE ) 0xeeeeee;
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( portSTACK_TYPE ) 0xdddddd;
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( portSTACK_TYPE ) pvParameters;
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( portSTACK_TYPE ) 0xbbbbbb;
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( portSTACK_TYPE ) 0xaaaaaa;
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( portSTACK_TYPE ) 0x999999;
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( portSTACK_TYPE ) 0x888888;
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( portSTACK_TYPE ) 0x555555;
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( portSTACK_TYPE ) 0x666666;
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( portSTACK_TYPE ) 0x555555;
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( portSTACK_TYPE ) 0x444444;
|
||||
pxTopOfStack--;
|
||||
|
||||
/* A variable is used to keep track of the critical section nesting.
|
||||
This variable has to be stored as part of the task context and is
|
||||
initially set to zero. */
|
||||
*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;
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
void vPortEndScheduler( void )
|
||||
{
|
||||
/* It is unlikely that the MSP430 port will get stopped. If required simply
|
||||
disable the tick interrupt here. */
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/*
|
||||
* Hardware initialisation to generate the RTOS tick.
|
||||
*/
|
||||
void vPortSetupTimerInterrupt( void )
|
||||
{
|
||||
vApplicationSetupTimerInterrupt();
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
#pragma vector=configTICK_INTERRUPT_VECTOR
|
||||
interrupt void vTickISREntry( void )
|
||||
{
|
||||
extern void vPortTickISR( void );
|
||||
|
||||
#if configUSE_PREEMPTION == 1
|
||||
extern void vPortPreemptiveTickISR( void );
|
||||
vPortPreemptiveTickISR();
|
||||
#else
|
||||
extern void vPortCooperativeTickISR( void );
|
||||
vPortCooperativeTickISR();
|
||||
#endif
|
||||
}
|
||||
|
||||
|
||||
@ -0,0 +1,173 @@
|
||||
;
|
||||
; 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.
|
||||
|
||||
; * The definition of the "register test" tasks, as described at the top of
|
||||
; * main.c
|
||||
|
||||
.global vTaskIncrementTick
|
||||
.global vTaskSwitchContext
|
||||
.global vPortSetupTimerInterrupt
|
||||
.global pxCurrentTCB
|
||||
.global usCriticalNesting
|
||||
|
||||
.def vPortPreemptiveTickISR
|
||||
.def vPortCooperativeTickISR
|
||||
.def vPortYield
|
||||
.def xPortStartScheduler
|
||||
|
||||
;-----------------------------------------------------------
|
||||
|
||||
portSAVE_CONTEXT .macro
|
||||
|
||||
;Save the remaining registers.
|
||||
pushm.a #12, r15
|
||||
movx.w &usCriticalNesting, r14
|
||||
pushx.a r14
|
||||
movx.a &pxCurrentTCB, r12
|
||||
movx.a sp, 0( r12 )
|
||||
.endm
|
||||
;-----------------------------------------------------------
|
||||
|
||||
portRESTORE_CONTEXT .macro
|
||||
|
||||
movx.a &pxCurrentTCB, r12
|
||||
movx.a @r12, sp
|
||||
popx.a r15
|
||||
movx.w r15, &usCriticalNesting
|
||||
popm.a #12, r15
|
||||
|
||||
;The last thing on the stack will be the status register.
|
||||
;Ensure the power down bits are clear ready for the next
|
||||
;time this power down register is popped from the stack.
|
||||
bic.w #0xf0, 0( sp )
|
||||
|
||||
pop.w sr
|
||||
reta
|
||||
.endm
|
||||
;-----------------------------------------------------------
|
||||
|
||||
;*
|
||||
;* 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.
|
||||
;*/
|
||||
|
||||
.text
|
||||
|
||||
vPortPreemptiveTickISR:
|
||||
|
||||
; The sr is not saved in portSAVE_CONTEXT() because vPortYield() needs
|
||||
;to save it manually before it gets modified (interrupts get disabled).
|
||||
push.w sr
|
||||
portSAVE_CONTEXT
|
||||
|
||||
calla #vTaskIncrementTick
|
||||
calla #vTaskSwitchContext
|
||||
|
||||
portRESTORE_CONTEXT
|
||||
;-----------------------------------------------------------
|
||||
|
||||
vPortCooperativeTickISR:
|
||||
|
||||
; The sr is not saved in portSAVE_CONTEXT() because vPortYield() needs
|
||||
;to save it manually before it gets modified (interrupts get disabled).
|
||||
push.w sr
|
||||
portSAVE_CONTEXT
|
||||
|
||||
calla #vTaskIncrementTick
|
||||
calla #vTaskSwitchContext
|
||||
|
||||
portRESTORE_CONTEXT
|
||||
;-----------------------------------------------------------
|
||||
|
||||
;*
|
||||
;* Manual context switch called by the portYIELD() macro.
|
||||
;*/
|
||||
vPortYield:
|
||||
|
||||
; The sr needs saving before it is modified.
|
||||
push.w sr
|
||||
|
||||
; Now the SR is stacked we can disable interrupts.
|
||||
dint
|
||||
nop
|
||||
|
||||
; Save the context of the current task.
|
||||
portSAVE_CONTEXT
|
||||
|
||||
; Select the next task to run.
|
||||
calla #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.
|
||||
calla #vPortSetupTimerInterrupt
|
||||
|
||||
; Restore the context of the first task that is going to run.
|
||||
portRESTORE_CONTEXT
|
||||
;-----------------------------------------------------------
|
||||
|
||||
.end
|
||||
|
||||
@ -0,0 +1,154 @@
|
||||
/*
|
||||
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
|
||||
|
||||
/*-----------------------------------------------------------
|
||||
* Port specific definitions.
|
||||
*
|
||||
* The settings in this file configure FreeRTOS correctly for the
|
||||
* given hardware and compiler.
|
||||
*
|
||||
* These settings should not be altered.
|
||||
*-----------------------------------------------------------
|
||||
*/
|
||||
|
||||
/* Hardware includes. */
|
||||
#include "msp430.h"
|
||||
|
||||
/* Type definitions. */
|
||||
#define portCHAR char
|
||||
#define portFLOAT float
|
||||
#define portDOUBLE double
|
||||
#define portLONG long
|
||||
#define portSHORT int
|
||||
#define portSTACK_TYPE unsigned portLONG
|
||||
#define portBASE_TYPE portSHORT
|
||||
|
||||
#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
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/* Interrupt control macros. */
|
||||
#define portDISABLE_INTERRUPTS() _disable_interrupt()
|
||||
#define portENABLE_INTERRUPTS() _enable_interrupt()
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/* Critical section control macros. */
|
||||
#define portNO_CRITICAL_SECTION_NESTING ( ( unsigned portSHORT ) 0 )
|
||||
|
||||
#define portENTER_CRITICAL() \
|
||||
{ \
|
||||
extern volatile unsigned short usCriticalNesting; \
|
||||
\
|
||||
portDISABLE_INTERRUPTS(); \
|
||||
\
|
||||
/* Now interrupts are disabled usCriticalNesting can be accessed */ \
|
||||
/* directly. Increment ulCriticalNesting to keep a count of how many */ \
|
||||
/* times portENTER_CRITICAL() has been called. */ \
|
||||
usCriticalNesting++; \
|
||||
}
|
||||
|
||||
#define portEXIT_CRITICAL() \
|
||||
{ \
|
||||
extern volatile unsigned short usCriticalNesting; \
|
||||
\
|
||||
if( usCriticalNesting > portNO_CRITICAL_SECTION_NESTING ) \
|
||||
{ \
|
||||
/* Decrement the nesting count as we are leaving a critical section. */ \
|
||||
usCriticalNesting--; \
|
||||
\
|
||||
/* If the nesting level has reached zero then interrupts should be */ \
|
||||
/* re-enabled. */ \
|
||||
if( usCriticalNesting == portNO_CRITICAL_SECTION_NESTING ) \
|
||||
{ \
|
||||
portENABLE_INTERRUPTS(); \
|
||||
} \
|
||||
} \
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/* Task utilities. */
|
||||
|
||||
/*
|
||||
* Manual context switch called by portYIELD or taskYIELD.
|
||||
*/
|
||||
extern void vPortYield( void );
|
||||
#define portYIELD() vPortYield()
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/* Hardware specifics. */
|
||||
#define portBYTE_ALIGNMENT 4
|
||||
#define portSTACK_GROWTH ( -1 )
|
||||
#define portTICK_RATE_MS ( ( portTickType ) 1000 / configTICK_RATE_HZ )
|
||||
#define portNOP()
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/* 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 )
|
||||
|
||||
extern void vTaskSwitchContext( void );
|
||||
#define portYIELD_FROM_ISR( x ) if( x ) vPortYield()
|
||||
|
||||
void vApplicationSetupTimerInterrupt( void );
|
||||
|
||||
#endif /* PORTMACRO_H */
|
||||
|
||||
Loading…
Reference in New Issue