button_test.c

LINUX2.6下实现按键驱动

#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;
              }

   while(1) {

   read(fileno,&number,1);
   printf("key=0x%x\n",number);
    }
   
   close(fileno);
   return 0;

}