lcdtest.c

来自「用于Linux 2.4内核的LCD及键盘驱动」· C语言 代码 · 共 26 行

#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[100];
  char *p;
  int lcd_fd;
  printf ("please enter the words(max char num:100):\n");
  p = gets(str);
  lcd_fd = open ("/dev/my_lcd", O_WRONLY | O_NDELAY);
  if (lcd_fd == -1)
    {
      perror ("open");
      exit (-1);
    }
  write (lcd_fd, p, strlen (p));
  printf ("hello linux world\n");
  close (lcd_fd);
  return 0;
}