keyboard.h

单片机 电子钟 是用c语言编程的

#ifndef __KEYBOARD_H__
#define __KEYBOARD_H__

#include <at89x51.h>

#define FUNCTION_KEY   (!(P1_0))
#define UP_KEY         (!(P1_1))
#define DOWN_KEY       (!(P1_2))

#define KEY_INPUT      P1
#define KEY_PIN        0x07


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

extern unsigned char key;

void scan_keyboard(void);

#endif