test.c

用于Linux 2.4内核的LCD及键盘驱动

#include<stdio.h>
#include<stdlib.h>
#include<unistd.h>
#include<sys/types.h>
#include<sys/stat.h>
#include<fcntl.h>
int
main (int argc, char **argv)
{
  char *str = "Welcome to check lcd driver!";
  int lcd_fd;
  lcd_fd = open ("/dev/my_lcd", O_WRONLY | O_NDELAY);
  if (lcd_fd  == -1)
    {
      perror ("open");
      exit (-1);
    }
  write (lcd_fd, str, strlen(str));
  printf ("hello linux world\n");
  close (lcd_fd);
  return 0;
}