?? test.c
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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <fcntl.h> // open() close()
#include <unistd.h> // read() write()
#define DEVICE_NAME "/dev/gpio_led_ctl"
//define LED STATUS
#define LED_ON 0
#define LED_OFF 1
//------------------------------------- main ---------------------------------------------
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);//等待1秒再做下一步操作
ioctl(fd,LED_ON);
sleep(1);
}
// close
ret = close(fd);
printf ("ret=%d\n",ret);
printf ("close gpio_led_driver test\n");
}
return 0;
}// end main
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