led_driver_test.c.bak

通过客户机和服务器的方式来进行网络通信

/**************************************
* LED_Driver 用户程序led_drv_test.c  *          
***************************************/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <fcntl.h>// 调用open()、close()函数时使用
#define DEVICE_NAME     "/dev/led_drv"
/* 定义发光二极管LED状态　*/
#define LED_ON  0
#define LED_OFF 1
int main(void)
{
int fd;
int ret;
char *i;
printf("\nstart GPIO_led_driver test\n\n");
fd = open(DEVICE_NAME, O_RDWR);
printf("fd = %d\n",fd);
if (fd == -1)
{printf("open device %s error\n",DEVICE_NAME);
}
else
{
while(1)
{
ioctl(fd,LED_OFF);
sleep(1);//休眠1秒钟
ioctl(fd,LED_ON);
sleep(1);//休眠1秒钟
}
ret = close(fd);
printf ("ret=%d\n",ret);
printf ("close led_driver test\n");
}
return 0;
}