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jeremybenn |
/*
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FreeRTOS V6.1.1 - Copyright (C) 2011 Real Time Engineers Ltd.
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***************************************************************************
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* *
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* If you are: *
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* *
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* + New to FreeRTOS, *
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* + Wanting to learn FreeRTOS or multitasking in general quickly *
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* + Looking for basic training, *
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* + Wanting to improve your FreeRTOS skills and productivity *
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* *
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* then take a look at the FreeRTOS books - available as PDF or paperback *
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* *
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* "Using the FreeRTOS Real Time Kernel - a Practical Guide" *
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* http://www.FreeRTOS.org/Documentation *
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* *
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* A pdf reference manual is also available. Both are usually delivered *
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* to your inbox within 20 minutes to two hours when purchased between 8am *
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* and 8pm GMT (although please allow up to 24 hours in case of *
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* exceptional circumstances). Thank you for your support! *
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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 exception 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 the
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source code for proprietary components outside of the FreeRTOS kernel.
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FreeRTOS is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details. You should have received a copy of the GNU General Public
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License and the FreeRTOS license exception along with FreeRTOS; if not it
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can be viewed here: http://www.freertos.org/a00114.html and also obtained
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by writing to Richard Barry, contact details for whom are available on the
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FreeRTOS WEB site.
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1 tab == 4 spaces!
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http://www.FreeRTOS.org - Documentation, latest information, license and
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contact details.
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http://www.SafeRTOS.com - A version that is certified for use in safety
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critical systems.
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http://www.OpenRTOS.com - Commercial support, development, porting,
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licensing and training services.
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*/
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#ifndef PORTMACRO_H
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#define PORTMACRO_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*-----------------------------------------------------------
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* Port specific definitions.
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*
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* The settings in this file configure FreeRTOS correctly for the
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* given hardware and compiler.
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*
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* These settings should not be altered.
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*-----------------------------------------------------------
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*/
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/* Type definitions. */
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#define portCHAR char
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#define portFLOAT float
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#define portDOUBLE double
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#define portLONG long
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#define portSHORT short
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#define portSTACK_TYPE unsigned portCHAR
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#define portBASE_TYPE char
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#if( configUSE_16_BIT_TICKS == 1 )
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typedef unsigned portSHORT portTickType;
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#define portMAX_DELAY ( portTickType ) 0xffff
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#else
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typedef unsigned portLONG portTickType;
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#define portMAX_DELAY ( portTickType ) 0xffffffff
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#endif
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/*-----------------------------------------------------------*/
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/* Hardware specifics. */
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#define portBYTE_ALIGNMENT 2
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#define portSTACK_GROWTH ( -1 )
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#define portTICK_RATE_MS ( ( portTickType ) 1000 / configTICK_RATE_HZ )
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#define portYIELD() asm volatile( "TRAPA #0" )
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#define portNOP() asm volatile( "NOP" )
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/*-----------------------------------------------------------*/
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/* Critical section handling. */
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#define portENABLE_INTERRUPTS() asm volatile( "ANDC #0x7F, CCR" );
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#define portDISABLE_INTERRUPTS() asm volatile( "ORC #0x80, CCR" );
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/* Push the CCR then disable interrupts. */
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#define portENTER_CRITICAL() asm volatile( "STC CCR, @-ER7" ); \
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portDISABLE_INTERRUPTS();
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/* Pop the CCR to set the interrupt masking back to its previous state. */
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#define portEXIT_CRITICAL() asm volatile( "LDC @ER7+, CCR" );
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/*-----------------------------------------------------------*/
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/* Task utilities. */
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/* Context switch macros. These macros are very simple as the context
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is saved simply by selecting the saveall attribute of the context switch
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interrupt service routines. These macros save and restore the stack
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pointer to the TCB. */
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#define portSAVE_STACK_POINTER() \
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extern void* pxCurrentTCB; \
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\
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asm volatile( \
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"MOV.L @_pxCurrentTCB, ER5 \n\t" \
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"MOV.L ER7, @ER5 \n\t" \
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); \
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( void ) pxCurrentTCB;
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#define portRESTORE_STACK_POINTER() \
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extern void* pxCurrentTCB; \
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\
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asm volatile( \
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"MOV.L @_pxCurrentTCB, ER5 \n\t" \
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"MOV.L @ER5, ER7 \n\t" \
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); \
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( void ) pxCurrentTCB;
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/*-----------------------------------------------------------*/
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/* Macros to allow a context switch from within an application ISR. */
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#define portENTER_SWITCHING_ISR() portSAVE_STACK_POINTER(); {
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#define portEXIT_SWITCHING_ISR( x ) \
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if( x ) \
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{ \
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extern void vTaskSwitchContext( void ); \
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vTaskSwitchContext(); \
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} \
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} portRESTORE_STACK_POINTER();
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/*-----------------------------------------------------------*/
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/* Task function macros as described on the FreeRTOS.org WEB site. */
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#define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters )
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#define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters )
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#ifdef __cplusplus
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}
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#endif
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#endif /* PORTMACRO_H */
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