Add IAR MSP430 port layer.
Richard Barry
17 years ago
parent
151882a872
commit
48a34c5fd1
@ -0,0 +1,195 @@
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/*
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FreeRTOS.org V5.1.0 - Copyright (C) 2003-2008 Richard Barry.
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This file is part of the FreeRTOS.org distribution.
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|
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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.
|
||||||
|
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||||||
|
FreeRTOS.org is distributed in the hope that it will be useful,
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||||||
|
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
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||||||
|
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||||||
|
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
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|
can be applied.
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||||||
|
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||||||
|
***************************************************************************
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|
***************************************************************************
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* *
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||||||
|
* 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 *
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||||||
|
* expedite your project. *
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||||||
|
* *
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||||||
|
***************************************************************************
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|
***************************************************************************
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|
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Please ensure to read the configuration and relevant port sections of the
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online documentation.
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||||||
|
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||||||
|
http://www.FreeRTOS.org - Documentation, latest information, license and
|
||||||
|
contact details.
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||||||
|
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||||||
|
http://www.SafeRTOS.com - A version that is certified for use in safety
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||||||
|
critical systems.
|
||||||
|
|
||||||
|
http://www.OpenRTOS.com - Commercial support, development, porting,
|
||||||
|
licensing and training services.
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||||||
|
*/
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/* Scheduler includes. */
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#include "FreeRTOS.h"
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#include "task.h"
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/*-----------------------------------------------------------
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* Implementation of functions defined in portable.h for the MSP430 port.
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*----------------------------------------------------------*/
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/* Constants required for hardware setup. The tick ISR runs off the ACLK,
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not the MCLK. */
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#define portACLK_FREQUENCY_HZ ( ( portTickType ) 32768 )
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#define portINITIAL_CRITICAL_NESTING ( ( unsigned portSHORT ) 10 )
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#define portFLAGS_INT_ENABLED ( ( portSTACK_TYPE ) 0x08 )
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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 tskTCB;
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extern volatile tskTCB * volatile pxCurrentTCB;
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/* Each task maintains a count of the critical section nesting depth. Each
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time a critical section is entered the count is incremented. Each time a
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critical section is exited the count is decremented - with interrupts only
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being re-enabled if the count is zero.
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usCriticalNesting will get set to zero when the scheduler starts, but must
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not be initialised to zero as this will cause problems during the startup
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sequence. */
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volatile unsigned portSHORT usCriticalNesting = portINITIAL_CRITICAL_NESTING;
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/*-----------------------------------------------------------*/
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/*
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* Sets up the periodic ISR used for the RTOS tick. This uses timer 0, but
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* could have alternatively used the watchdog timer or timer 1.
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*/
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void vPortSetupTimerInterrupt( void );
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/*-----------------------------------------------------------*/
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/*
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* Initialise the stack of a task to look exactly as if a call to
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* portSAVE_CONTEXT had been called.
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*
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* See the header file portable.h.
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*/
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portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters )
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{
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/*
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Place a few bytes of known values on the bottom of the stack.
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This is just useful for debugging and can be included if required.
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*pxTopOfStack = ( portSTACK_TYPE ) 0x1111;
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0x2222;
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0x3333;
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pxTopOfStack--;
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*/
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/* The msp430 automatically pushes the PC then SR onto the stack before
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executing an ISR. We want the stack to look just as if this has happened
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so place a pointer to the start of the task on the stack first - followed
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by the flags we want the task to use when it starts up. */
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*pxTopOfStack = ( portSTACK_TYPE ) pxCode;
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pxTopOfStack--;
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*pxTopOfStack = portFLAGS_INT_ENABLED;
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pxTopOfStack--;
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/* Next the general purpose registers. */
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*pxTopOfStack = ( portSTACK_TYPE ) 0x4444;
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0x5555;
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0x6666;
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0x7777;
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0x8888;
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0x9999;
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0xaaaa;
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0xbbbb;
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pxTopOfStack--;
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/* When the task starts is will expect to find the function parameter in
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R15. */
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*pxTopOfStack = ( portSTACK_TYPE ) pvParameters;
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0xdddd;
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0xeeee;
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0xffff;
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pxTopOfStack--;
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/* A variable is used to keep track of the critical section nesting.
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This variable has to be stored as part of the task context and is
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initially set to zero. */
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*pxTopOfStack = ( portSTACK_TYPE ) portNO_CRITICAL_SECTION_NESTING;
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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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return pxTopOfStack;
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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 MSP430 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 timer 0
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* but could alternatively use the watchdog timer or timer 1.
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*/
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void vPortSetupTimerInterrupt( void )
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{
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/* Ensure the timer is stopped. */
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TACTL = 0;
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/* Run the timer of the ACLK. */
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TACTL = TASSEL_1;
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/* Clear everything to start with. */
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TACTL |= TACLR;
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/* Set the compare match value according to the tick rate we want. */
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TACCR0 = portACLK_FREQUENCY_HZ / configTICK_RATE_HZ;
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/* Enable the interrupts. */
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TACCTL0 = CCIE;
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/* Start up clean. */
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TACTL |= TACLR;
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/* Up mode. */
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TACTL |= MC_1;
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}
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/*-----------------------------------------------------------*/
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@ -0,0 +1,106 @@
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/*
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FreeRTOS.org V5.1.0 - Copyright (C) 2003-2008 Richard Barry.
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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.
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||||||
|
|
||||||
|
***************************************************************************
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||||||
|
***************************************************************************
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||||||
|
* *
|
||||||
|
* 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. *
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||||||
|
* *
|
||||||
|
***************************************************************************
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||||||
|
***************************************************************************
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||||||
|
|
||||||
|
Please ensure to read the configuration and relevant port sections of the
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||||||
|
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.
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*/
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#ifndef PORTASM_H
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#define PORTASM_H
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portSAVE_CONTEXT macro
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IMPORT pxCurrentTCB
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IMPORT usCriticalNesting
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/* Save the remaining registers. */
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push r4
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push r5
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push r6
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push r7
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push r8
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push r9
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push r10
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push r11
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push r12
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push r13
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push r14
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push r15
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mov.w &usCriticalNesting, r14
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push r14
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mov.w &pxCurrentTCB, r12
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mov.w r1, 0(r12)
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endm
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/*-----------------------------------------------------------*/
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portRESTORE_CONTEXT macro
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mov.w &pxCurrentTCB, r12
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mov.w @r12, r1
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pop r15
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mov.w r15, &usCriticalNesting
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pop r15
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pop r14
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pop r13
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pop r12
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pop r11
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pop r10
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pop r9
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pop r8
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pop r7
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pop r6
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pop r5
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pop r4
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/* The last thing on the stack will be the status register.
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Ensure the power down bits are clear ready for the next
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time this power down register is popped from the stack. */
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bic.w #0xf0,0(SP)
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reti
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endm
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/*-----------------------------------------------------------*/
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#endif
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@ -0,0 +1,128 @@
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/*
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FreeRTOS.org V5.1.0 - Copyright (C) 2003-2008 Richard Barry.
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||||||
|
|
||||||
|
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.
|
||||||
|
*/
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#include "FreeRTOSConfig.h"
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#include "portasm.h"
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IMPORT vTaskIncrementTick
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IMPORT vTaskSwitchContext
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IMPORT vPortSetupTimerInterrupt
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EXPORT vTickISR
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EXPORT vPortYield
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EXPORT xPortStartScheduler
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RSEG CODE
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/*
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* The RTOS tick ISR.
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*
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* If the cooperative scheduler is in use this simply increments the tick
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* count.
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*
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* If the preemptive scheduler is in use a context switch can also occur.
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*/
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vTickISR:
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portSAVE_CONTEXT
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call #vTaskIncrementTick
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#if configUSE_PREEMPTION == 1
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call #vTaskSwitchContext
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#endif
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portRESTORE_CONTEXT
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/*-----------------------------------------------------------*/
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/*
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* Manual context switch called by the portYIELD() macro.
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*/
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vPortYield:
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/* Mimic an interrupt by pushing the SR. */
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push SR
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/* Now the SR is stacked we can disable interrupts. */
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dint
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/* Save the context of the current task. */
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portSAVE_CONTEXT
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/* Switch to the highest priority task that is ready to run. */
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call #vTaskSwitchContext
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/* Restore the context of the new task. */
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portRESTORE_CONTEXT
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/*-----------------------------------------------------------*/
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/*
|
||||||
|
* 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 #vPortSetupTimerInterrupt
|
||||||
|
|
||||||
|
/* Restore the context of the first task that is going to run. */
|
||||||
|
portRESTORE_CONTEXT
|
||||||
|
/*-----------------------------------------------------------*/
|
||||||
|
|
||||||
|
|
||||||
|
/* Install vTickISR as the timer A0 interrupt. */
|
||||||
|
ASEG
|
||||||
|
ORG 0xFFE0 + TIMERA0_VECTOR
|
||||||
|
|
||||||
|
_vTickISR_: DC16 vTickISR
|
||||||
|
|
||||||
|
|
||||||
|
END
|
||||||
|
|
||||||
@ -0,0 +1,149 @@
|
|||||||
|
/*
|
||||||
|
FreeRTOS.org V5.1.0 - 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.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#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.
|
||||||
|
*-----------------------------------------------------------
|
||||||
|
*/
|
||||||
|
|
||||||
|
/* Type definitions. */
|
||||||
|
#define portCHAR char
|
||||||
|
#define portFLOAT float
|
||||||
|
#define portDOUBLE double
|
||||||
|
#define portLONG long
|
||||||
|
#define portSHORT int
|
||||||
|
#define portSTACK_TYPE unsigned portSHORT
|
||||||
|
#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() _DINT();
|
||||||
|
#define portENABLE_INTERRUPTS() _EINT();
|
||||||
|
/*-----------------------------------------------------------*/
|
||||||
|
|
||||||
|
/* Critical section control macros. */
|
||||||
|
#define portNO_CRITICAL_SECTION_NESTING ( ( unsigned portSHORT ) 0 )
|
||||||
|
|
||||||
|
#define portENTER_CRITICAL() \
|
||||||
|
{ \
|
||||||
|
extern volatile unsigned portSHORT 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 portSHORT 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 2
|
||||||
|
#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 )
|
||||||
|
|
||||||
|
#if configINTERRUPT_EXAMPLE_METHOD == 2
|
||||||
|
|
||||||
|
extern void vTaskSwitchContext( void );
|
||||||
|
#define portYIELD_FROM_ISR( x ) if( x ) vTaskSwitchContext()
|
||||||
|
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#endif /* PORTMACRO_H */
|
||||||
|
|
||||||
Loading…
Reference in New Issue