main.c

270的GPIO驱动是一个GPIO按键的驱动

/************************************************\
** KEY-TEST
   270keytest  Copyright (C) 2008, Aumed
   Author machuanlong 
*						*
\***********************************************/

#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/ioctl.h>
#include <pthread.h>
#include <fcntl.h>


#define KEY_DEV		"/dev/key2"
static int key2_fd=-1;
static int GetKEYresult()
{
	int data;
	read(key2_fd, &data, sizeof(data));
	return data;
}
static int stop=0;

int main(void)
{
	int key;
	int i;
	if((key2_fd=open(KEY_DEV, O_RDWR))<0){
		printf("Error opening %s 270key\n", KEY_DEV);
		return -1;
	}
                                                                               

	for(i=0;i<10;i++)
	{
			key=GetKEYresult();
			printf("key number =%d\t",key);
			printf("\n");
			printf("\r");
		
	}
	close(key2_fd);
	return 0;
}