FreeRTOS-Kernel/Demo/ARM7_AT91FR40008_GCC/ParTest/ParTest.c

/*
    FreeRTOS V6.0.5 - Copyright (C) 2010 Real Time Engineers Ltd.

    ***************************************************************************
    *                                                                         *
    * If you are:                                                             *
    *                                                                         *
    *    + New to FreeRTOS,                                                   *
    *    + Wanting to learn FreeRTOS or multitasking in general quickly       *
    *    + Looking for basic training,                                        *
    *    + Wanting to improve your FreeRTOS skills and productivity           *
    *                                                                         *
    * then take a look at the FreeRTOS eBook                                  *
    *                                                                         *
    *        "Using the FreeRTOS Real Time Kernel - a Practical Guide"        *
    *                  http://www.FreeRTOS.org/Documentation                  *
    *                                                                         *
    * A pdf reference manual is also available.  Both are usually delivered   *
    * to your inbox within 20 minutes to two hours when purchased between 8am *
    * and 8pm GMT (although please allow up to 24 hours in case of            *
    * exceptional circumstances).  Thank you for your support!                *
    *                                                                         *
    ***************************************************************************

    This file is part of the FreeRTOS distribution.

    FreeRTOS is free software; you can redistribute it and/or modify it under
    the terms of the GNU General Public License (version 2) as published by the
    Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
    ***NOTE*** The exception to the GPL is included to allow you to distribute
    a combined work that includes FreeRTOS without being obliged to provide the
    source code for proprietary components outside of the FreeRTOS kernel.
    FreeRTOS 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 and the FreeRTOS license exception along with FreeRTOS; if not it 
    can be viewed here: http://www.freertos.org/a00114.html and also obtained 
    by writing to Richard Barry, contact details for whom are available on the
    FreeRTOS WEB site.

    1 tab == 4 spaces!

    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.
*/

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

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

/* Hardware specific definitions. */
#include "AT91R40008.h"
#include "pio.h"
#include "aic.h"

#define partstNUM_LEDS			( 8 )
#define partstALL_OUTPUTS_OFF	( ( unsigned long ) ~(0xFFFFFFFF << partstNUM_LEDS) )

static unsigned long ulLEDReg;

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

static void SetLeds (unsigned int leds)
{
unsigned long ulPIOSetReg, ulPIOClearReg;

	/* LEDs are grouped in different port bits: P3-P6 and P16-P19.
	A port bit set to '0' turns an LED on, '1' turns it off. */

	ulPIOSetReg = ( (leds & 0xF) << 16 ) | ( (leds & 0xF0) >> 1 );
	ulPIOClearReg = (~ulPIOSetReg) & 0x000F0078;

	AT91C_BASE_PIO->PIO_SODR = ulPIOSetReg;
	AT91C_BASE_PIO->PIO_CODR = ulPIOClearReg;
}
/*-----------------------------------------------------------*/

void vParTestInitialise( void )
{
	/* This is performed from main() as the io bits are shared with other setup
	functions.  Ensure the outputs are off to start. */
	ulLEDReg = partstALL_OUTPUTS_OFF;  

	/* Enable clock to PIO... */
	AT91C_BASE_PS->PS_PCER = AT91C_PS_PIO;

	/* Enable all 8 LEDs and the four switches to be controlled by PIO... */
	AT91C_BASE_PIO->PIO_PER = P3 | P4 | P5 | P6 | P16 | P17 | P18 | P19 | P1 | P2 | P9 | P12;

	/* Configure all LED PIO lines for output... */
	AT91C_BASE_PIO->PIO_OER = P3 | P4 | P5 | P6 | P16 | P17 | P18 | P19;

	/* Configure all switch PIO lines for input... */
	AT91C_BASE_PIO->PIO_ODR = P1 | P2 | P9 | P12;

	/* Set initial state of LEDs. */
	SetLeds( ulLEDReg );
}
/*-----------------------------------------------------------*/

void vParTestSetLED( unsigned portBASE_TYPE uxLED, signed portBASE_TYPE xValue )
{
	/* Switch an LED on or off as requested. */
	if (uxLED < partstNUM_LEDS)
	{
		if( xValue )
		{
			ulLEDReg &= ~(1 << uxLED);
		}
		else
		{
			ulLEDReg |= (1 << uxLED);
		}

		SetLeds( ulLEDReg );
	}
}
/*-----------------------------------------------------------*/

void vParTestToggleLED( unsigned portBASE_TYPE uxLED )
{
	/* Toggle the state of the requested LED. */
	if (uxLED < partstNUM_LEDS)
	{
		ulLEDReg ^= ( 1 << uxLED );
		SetLeds( ulLEDReg );
	}
}