platform_led的测试程序

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/********************************************************************************* *      Copyright:  (C) 2015 lingyun *                  All rights reserved. * *       Filename:  test_plat_led.c *    Description:  This file  * *                  *        Version:  1.0.0(2015年04月11日) *         Author:  lzj <530604689@qq.com> *      ChangeLog:  1, Release initial version on "2015年04月11日 19时18分05秒" *                  ********************************************************************************/#include <stdio.h>#include <stdarg.h>#include <sys/stat.h>#include <sys/ioctl.h>#include <unistd.h>#include <fcntl.h>#include <sys/types.h>#include <stdlib.h>#define PLATDRV_MAGIC             0x60#define LED_OFF                   _IO (PLATDRV_MAGIC, 0x18)#define LED_ON                    _IO (PLATDRV_MAGIC, 0x19)#define LED_BLINK                 _IO (PLATDRV_MAGIC, 0x1A)int main(int argc,char **argv){    int   i;    int   led_num;    int   cmd_num;    int   fd;    char  dev_name[10]={0};           if(argc<3)        {        printf("too few parameters,please input:./%s 0|1|2|3 0(ON)|1(OFF)|2(BLINK)\n",argv[0]);            return -1;    }          snprintf(dev_name,sizeof(dev_name),"/dev/led");     fd=open(dev_name,O_RDWR);         led_num=atoi(argv[1]);    cmd_num=atoi(argv[2]);    switch(cmd_num)    {            case 0:                ioctl(fd,LED_ON,led_num);        break;        case 1:                 ioctl(fd,LED_OFF,led_num);        break;        case 2:                ioctl(fd,LED_BLINK,led_num);        break;        default:        printf("failure\n");        break;    }       close(fd);return 0;}

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./a.out 0 0就可以让第一盏灯亮 ./a.out 0 1即灭 ./a.out 0 2即闪依次类推./a.out 1 0是控制第二盏灯..........

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