restore_pot.c

计时程序, 1分钟翻转1bit的flash

/*
 * flash.c - flash handling for installing an image
 *
 * Copyright (C) 2002 by Intersil Corp.
 *
 * 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 <limits.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <fcntl.h>
#include <errno.h>
#include <error.h>
#include <time.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/reboot.h>
#include <string.h>
#include <linux/mtd/mtd.h>



#define SECTOR_SIZE ( 0x20000 )

int main(int argc, char *argv[])
{
	int	devfd		=-1;
	unsigned long	value;
	unsigned long	flag;
	int 	i;
	erase_info_t	eraseinfo;

	if ((devfd = open( "/dev/mtd/4" ,O_RDWR)) == -1 ){
		printf("Failed to open device\n");
		return -EINVAL;
	}
	
	eraseinfo.start=0;
	eraseinfo.length=SECTOR_SIZE;
	
	if ( ioctl(devfd,MEMERASE,&eraseinfo) != 0){
		printf("Flash erase of device mtd/4 is failed\n");
		return 0;		
	}
	close(devfd);
	return 1;
}