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Richard Barry 2008-02-13 10:36:35 +00:00
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commit e20f132f48
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20080212/Demo/AVR_ATMega323_WinAVR/ParTest/ParTest.c Normal file
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/*
FreeRTOS.org V4.7.1 - 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.
***************************************************************************
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.
***************************************************************************
*/
/*
Changes from V2.0.0
+ Use scheduler suspends in place of critical sections.
Changes from V2.6.0
+ Replaced the inb() and outb() functions with direct memory
access. This allows the port to be built with the 20050414 build of
WinAVR.
*/
#include "FreeRTOS.h"
#include "task.h"
#include "partest.h"
/*-----------------------------------------------------------
* Simple parallel port IO routines.
*-----------------------------------------------------------*/
#define partstALL_BITS_OUTPUT ( ( unsigned portCHAR ) 0xff )
#define partstALL_OUTPUTS_OFF ( ( unsigned portCHAR ) 0xff )
#define partstMAX_OUTPUT_LED ( ( unsigned portCHAR ) 7 )
static volatile unsigned portCHAR ucCurrentOutputValue = partstALL_OUTPUTS_OFF; /*lint !e956 File scope parameters okay here. */
/*-----------------------------------------------------------*/
void vParTestInitialise( void )
{
ucCurrentOutputValue = partstALL_OUTPUTS_OFF;
/* Set port B direction to outputs. Start with all output off. */
DDRB = partstALL_BITS_OUTPUT;
PORTB = ucCurrentOutputValue;
}
/*-----------------------------------------------------------*/
void vParTestSetLED( unsigned portBASE_TYPE uxLED, signed portBASE_TYPE xValue )
{
unsigned portCHAR ucBit = ( unsigned portCHAR ) 1;
if( uxLED <= partstMAX_OUTPUT_LED )
{
ucBit <<= uxLED;
}
vTaskSuspendAll();
{
if( xValue == pdTRUE )
{
ucBit ^= ( unsigned portCHAR ) 0xff;
ucCurrentOutputValue &= ucBit;
}
else
{
ucCurrentOutputValue |= ucBit;
}
PORTB = ucCurrentOutputValue;
}
xTaskResumeAll();
}
/*-----------------------------------------------------------*/
void vParTestToggleLED( unsigned portBASE_TYPE uxLED )
{
unsigned portCHAR ucBit;
if( uxLED <= partstMAX_OUTPUT_LED )
{
ucBit = ( ( unsigned portCHAR ) 1 ) << uxLED;
vTaskSuspendAll();
{
if( ucCurrentOutputValue & ucBit )
{
ucCurrentOutputValue &= ~ucBit;
}
else
{
ucCurrentOutputValue |= ucBit;
}
PORTB = ucCurrentOutputValue;
}
xTaskResumeAll();
}
}