keyboard.h

来自「一用1602显示的单片机时钟程序」· C头文件 代码 · 共 41 行

/*
 keyboard.H file
 Created by Computer-lov. Date: 2005.5.31
 Last edited date:2005.5.31
 Copyright (c) 2005 Computer-lov
 version 1.0
 All rigths reserved
 欢迎访问我的blog：  http://computer00.21ic.org
*/

#ifndef __KEYBOARD_H__
#define __KEYBOARD_H__

#include <at89x51.h>

/*****************************************************/
#define ENTER		   (!(P3_4))
/*****************************************************/
#define FUNCTION_KEY   (!(P3_5))
#define UP_KEY         (!(P3_6))
#define DOWN_KEY       (!(P3_7))

#define KEY_INPUT      P3
#define KEY_PIN        0xF0


#define KEY_NOTHING       0
#define KEY_FUNCTION      1
#define KEY_UP            2
#define KEY_DOWN          3

/*****************************************************/
#define KEY_ENTER         4
/*****************************************************/

extern unsigned char key;

void scan_keyboard(void);

#endif