test.c

lcd驱动报告,看完能有所帮助

#include<stdio.h>
#include<sys/types.h>
#include<sys/stat.h>
#include<fcntl.h>
#include<unistd.h>
int main(void)
{
  char *str;

  int dev,i=0;
  dev=open("/dev/lcd_driver",O_WRONLY|O_NDELAY);
 if(dev==-1){
  printf("open() failed!\n");
  exit(-1);
 }
 printf("please input :\n");
 while((*(str+i)=getchar())!='!')
  {
    i++;
  }
 write(dev,str,strlen(str)); 

  close(dev);
 printf("succeed\n");
 return 0;
}