led.c

实现了跳过at91rm9200dk的loader直接使用uboot来引导我们的linux系统。

/*
 * (C) Copyright 2006
 * Atmel Nordic AB <www.atmel.com>
 * Ulf Samuelsson <[e-mail]>
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program 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.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <asm/arch/AT91RM9200.h>

#define	GREEN_LED	AT91C_PIO_PB0
#define	YELLOW_LED	AT91C_PIO_PB1
#define	RED_LED	AT91C_PIO_PB2

void	green_LED_on(void)
{
	AT91PS_PIO	PIOB	= AT91C_BASE_PIOB;
	PIOB->PIO_CODR		= GREEN_LED;
}

void	 yellow_LED_on(void)
{
	AT91PS_PIO	PIOB	= AT91C_BASE_PIOB;
	PIOB->PIO_CODR		= YELLOW_LED;
}

void	 red_LED_on(void)
{
	AT91PS_PIO	PIOB	= AT91C_BASE_PIOB;
	PIOB->PIO_CODR		= RED_LED;
}

void	green_LED_off(void)
{
	AT91PS_PIO	PIOB	= AT91C_BASE_PIOB;
	PIOB->PIO_SODR		= GREEN_LED;
}

void	yellow_LED_off(void)
{
	AT91PS_PIO	PIOB	= AT91C_BASE_PIOB;
	PIOB->PIO_SODR		= YELLOW_LED;
}

void	red_LED_off(void)
{
	AT91PS_PIO	PIOB	= AT91C_BASE_PIOB;
	PIOB->PIO_SODR		= RED_LED;
}


void coloured_LED_init (void)
{
	AT91PS_PIO	PIOB	= AT91C_BASE_PIOB;
	AT91PS_PMC	PMC	= AT91C_BASE_PMC;
	PMC->PMC_PCER		= (1 << AT91C_ID_PIOB);	/* Enable PIOB clock */
	/* Disable peripherals on LEDs */
	PIOB->PIO_PER		= AT91C_PIO_PB2 | AT91C_PIO_PB1 | AT91C_PIO_PB0;
	/* Enable pins as outputs */
	PIOB->PIO_OER		= AT91C_PIO_PB2 | AT91C_PIO_PB1 | AT91C_PIO_PB0;
	/* Turn all LEDs OFF */
	PIOB->PIO_SODR		= AT91C_PIO_PB2 | AT91C_PIO_PB1 | AT91C_PIO_PB0;
}