main.c

来自「周立功magic2410实验箱源码 第7章嵌入式Linux驱动开发 7.2 」· C语言 代码 · 共 73 行

/*
****************************************Copyright (c)**************************************************
**                               Guangzhou Zhiyuan Electronic Co.,LTD.
**                                     graduate school
**                                 http://www.zyinside.com
**
**------------------------------------- File Info ------------------------------------------------------
** File name:           main.c
** Last modified Date:  2005-12-28
** Last Version:        1.0
** Descriptions:        Test program for LED's driver.
**------------------------------------------------------------------------------------------------------
** Created by:          Chenxibing
** Created date:        2005-12-27
** Version:             1.0
** Descriptions:        Preliminary version.
**
**------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
** Version:
** Descriptions:
**
********************************************************************************************************
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/ioctl.h>

#define LED1 	0
#define ON 	1
#define OFF 	0

/*
*******************************************************************************************************
** Function name: main()
** Descriptions	: Controle led on/off.
** Input	: NONE
** Output	: NONE
** Created by	: Chenxibing
** Created Date	: 2005-12-28
**-----------------------------------------------------------------------------------------------------
** Modified by	:
** Modified Date: 
**-----------------------------------------------------------------------------------------------------
*******************************************************************************************************
*/
int main(int argc, char **argv)
{
	int i;
	int fd;

	fd = open("/dev/magic-leds", 0);
	if (fd < 0)
	{
		perror("Failed to open magic-leds");
		exit(1);
	}

	for (i=0; i<5; i++)
	{
		ioctl(fd, ON,  LED1);
		usleep(500000);
		ioctl(fd, OFF, LED1);
		usleep(500000);
	}

	close(fd);
	return 0;
}