led_driver_test.c~

来自「通过客户机和服务器的方式来进行网络通信」· C~ 代码 · 共 38 行

/**************************************
* LED_Driver Óû§³ÌÐòled_drv_test.c  *          
***************************************/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <fcntl.h>// µ÷ÓÃopen()¡¢close()º¯ÊýʱʹÓÃ
#define DEVICE_NAME     "/dev/led_driver"
/* ¶šÒå·¢¹â¶þŒ«¹ÜLED׎̬¡¡*/
#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);//ÐÝÃß1ÃëÖÓ
ioctl(fd,LED_ON);
sleep(1);//ÐÝÃß1ÃëÖÓ
}
ret = close(fd);
printf ("ret=%d\n",ret);
printf ("close led_driver test\n");
}
return 0;
}