led.c

包含了S3C2410（ARM9)的各种驱动源码

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/ioctl.h>
int main(int argc, char **argv)
{int on;
 int led_no;int fd;
 if (argc != 3 || sscanf(argv[1], "%d", &led_no) != 1 || sscanf(argv[2],"%d", &on) != 1 ||on < 0 || on >  1 || led_no < 0 || led_no > 3) 
  {fprintf(stderr, "Usage: leds led_no 0|1\n");exit(1);}fd = open("/dev/leds0", 0);
 if (fd < 0) {perror("open device leds");exit(1);}
 ioctl(fd, on, led_no);
 close(fd);
 return 0;}