test1.c

2440 下的5*5按键驱动程序.请参看具体代码内容.

#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>


main()
{
   int retval;
   int fileno;
   int ts, maxfd;
   int ret= 0,i,j;
   int number;
   fileno = open("/dev/button",O_RDWR);
       if (fileno == -1) {
               printf("open device led errr!\n");
               return 0;
              }
	printf ("open succeed");
   while(1) {
   read(fileno,&number,1);
   printf("key=0x%x\n",number);
    }
   close(fileno);
   return 0;

}