partest.c

freertosV4.40 是一种small的嵌入式系统。利于嵌入式开好者入门学习嵌入式操作系统。通过对于源码的学习可以很好的掌握freertos的运行机制。

/*
	FreeRTOS.org V4.4.0 - Copyright (C) 2003-2007 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.
	***************************************************************************
*/

/* FreeRTOS.org includes. */
#include "FreeRTOS.h"

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

#define partstFIRST_IO			( ( unsigned portLONG ) 0x01 )
#define partstNUM_LEDS			( 8 )
#define partstALL_OUTPUTS_OFF	( ( unsigned portLONG ) 0xff )

/*-----------------------------------------------------------
 * Simple parallel port IO routines.
 *-----------------------------------------------------------*/

void vParTestInitialise( void )
{
	PINSEL10 = 0;
	FIO2DIR  = 0x000000FF;
	FIO2MASK = 0x00000000;
	FIO2CLR  = 0xFF;
	SCS |= (1<<0); //fast mode for port 0 and 1

    FIO2CLR = partstALL_OUTPUTS_OFF;
}
/*-----------------------------------------------------------*/

void vParTestSetLED( unsigned portBASE_TYPE uxLED, signed portBASE_TYPE xValue )
{
unsigned portLONG ulLED = partstFIRST_IO;

	if( uxLED < partstNUM_LEDS )
	{
		/* Rotate to the wanted bit of port */
		ulLED <<= ( unsigned portLONG ) uxLED;

		/* Set of clear the output. */
		if( xValue )
		{
			FIO2CLR = ulLED;
		}
		else
		{
			FIO2SET = ulLED;
		}
	}
}
/*-----------------------------------------------------------*/

void vParTestToggleLED( unsigned portBASE_TYPE uxLED )
{
unsigned portLONG ulLED = partstFIRST_IO, ulCurrentState;

	if( uxLED < partstNUM_LEDS )
	{
		/* Rotate to the wanted bit of port 0.  Only P10 to P13 have an LED
		attached. */
		ulLED <<= ( unsigned portLONG ) uxLED;

		/* If this bit is already set, clear it, and visa versa. */
		ulCurrentState = FIO2PIN;
		if( ulCurrentState & ulLED )
		{
			FIO2CLR = ulLED;
		}
		else
		{
			FIO2SET = ulLED;			
		}
	}	
}

/*-----------------------------------------------------------*/
unsigned portBASE_TYPE uxParTextGetLED( unsigned portBASE_TYPE uxLED )
{
unsigned portLONG ulLED = partstFIRST_IO;
    
    ulLED <<= ( unsigned portLONG ) uxLED;

    return ( FIO2PIN & ulLED );
}