keyboard.h

KeilC开发,51通过8255对外部4*4键盘进行控制.按键分别为0-9以及上下左右,加上确认取消.

#include <reg51.h>
#include <8255A.h>
#include <intrins.h>

#define Uchar unsigned char
#define Uint unsigned int
#define NUM0	0
#define NUM1	1
#define NUM2	2
#define NUM3	3
#define NUM4	4
#define NUM5	5
#define NUM6	6
#define NUM7	7
#define NUM8	8
#define NUM9	9

#define CONFIRM    10
#define CANCEL     11

#define UP		12
#define DOWN	13
#define LEFT	14
#define RIGHT	15



void setcol(unsigned char col);
Uchar getrow();
void delay8255();
unsigned char WaitKey();
unsigned char GetKey();  //返回值为1～12，4×按键