partest.c

FreeRTOSV4.1.0 安裝文件 FreeRTOS 是一个源码公开的免费的嵌入式实时操作系统

/*
	FreeRTOS.org V4.1.0 - Copyright (C) 2003-2006 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.

	***************************************************************************
	See http://www.FreeRTOS.org for documentation, latest information, license 
	and contact details.  Please ensure to read the configuration and relevant 
	port sections of the online documentation.
	***************************************************************************
*/

/* Scheduler include files. */
#include "FreeRTOS.h"
#include "portable.h"

/* Demo application include files. */
#include "partest.h"

/*-----------------------------------------------------------
 * Simple parallel port IO routines.
 *
 * This is for the demo application which uses port 2 for LED outputs.
 *-----------------------------------------------------------*/

/* Value for the LED to be off. */
#define partstLED_OUTPUTS		( ( unsigned portCHAR ) 0xff )

/* P2.0 is not used as an output so there are only 7 LEDs on port 2. */
#define partstMAX_LEDs			( 7 )
#define partstALL_OUTPUTS_OFF	( ( unsigned portCHAR ) 0 )

/* Maps the LED outputs used by the standard demo application files to
convenient outputs for the EDK2329.  Mainly this insures that the LED
used by the Check task is one of the on board LEDs so the demo can be
executed on an EDK without any modification. */
static inline unsigned portCHAR prvMapLED( unsigned portBASE_TYPE uxLED );

/*-----------------------------------------------------------*/

void vParTestInitialise( void )
{
	/* LED's are connected to port 2.  P2.1 and P2.2 are built onto the EDK.
	P2.3 to P2.7 are soldered onto the expansion port. */
	P2DDR = partstLED_OUTPUTS;
	P2DR = partstALL_OUTPUTS_OFF;
}
/*-----------------------------------------------------------*/

/*
 * Described at the top of the file.
 */
static inline unsigned portCHAR prvMapLED( unsigned portBASE_TYPE uxLED )
{
	switch( uxLED )
	{
		case 0	:	return ( unsigned portCHAR ) 2;
		case 1	:	return ( unsigned portCHAR ) 3;
		case 2	:	return ( unsigned portCHAR ) 4;
		case 3 	:	return ( unsigned portCHAR ) 5;
		case 4	:	return ( unsigned portCHAR ) 6;
		case 5	:	return ( unsigned portCHAR ) 0;
		case 6	:	return ( unsigned portCHAR ) 1;
		default	:	return 0;
	}
}
/*-----------------------------------------------------------*/

/*
 * Turn an LED on or off.
 */
void vParTestSetLED( unsigned portBASE_TYPE uxLED, signed portBASE_TYPE xValue )
{
unsigned portCHAR ucLED;

	if( uxLED < partstMAX_LEDs )
	{
		ucLED = prvMapLED( uxLED );

		/* Set a bit in the required LED position.  LED 0 is bit 1. */
		ucLED = ( unsigned portCHAR ) 1 << ( ucLED + 1 );

		if( xValue )
		{
			portENTER_CRITICAL();
				P2DR |= ucLED;
			portEXIT_CRITICAL();
		}
		else
		{
			portENTER_CRITICAL();
				P2DR &= ~ucLED;
			portEXIT_CRITICAL();
		}		
	}
}
/*-----------------------------------------------------------*/

void vParTestToggleLED( unsigned portBASE_TYPE uxLED )
{
unsigned portCHAR ucLED;

	if( uxLED < partstMAX_LEDs )
	{
		ucLED = prvMapLED( uxLED );

		/* Set a bit in the required LED position.  LED 0 is bit 1. */
		ucLED = ( unsigned portCHAR ) 1 << ( ucLED + 1 );

		portENTER_CRITICAL();
		{
			if( P2DR & ucLED )
			{
				P2DR &= ~ucLED;
			}
			else
			{
				P2DR |= ucLED;
			}
		}
		portEXIT_CRITICAL();
	}	
}