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#include<reg52.h>
#include "key_4x4.h"
#include "printled.h"
#define uchar unsigned char
#define uint unsigned int
//主函数
void main (void)
{
P0=0x00;//8数码管亮 按相应的按键，会显示按键上的字符
while (1)
{
keyscan();
dispaly();
}
}
key_4x4.c----------------------------------------------------------------
#include "key_4x4.h"
void delay(uint i);
uchar led_data[10];
uchar key_v_fun(uchar key_n)
{
uchar key_v=key_n;
switch(key_v)
{
case 0x7e:key_v=0;//P0=0xc0;//0x3f; //0xc0; //0 ,kc键符。 按下相应的键显示相对应的码值 {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x40};
break;
case 0x7d:key_v=1;//P0=0xf9;//0x06; //0xf9;//1 ，kd键符
break;
case 0x7b:key_v=2;//P0=0xa4;//0x5b; //0xa4;
break; //2 ke键符
case 0x77:key_v=3;//P0=0xb0;//0x4f; //0xb0;
break; //3 kf键符
case 0xbe:key_v=4;//P0=0x99; //0x66; //0x99;
break; //4 k8键符
case 0xbd:key_v=5;//P0=0x92; //0x6d; //0x92
break; //5
case 0xbb:key_v=6;//P0=0x82; //0x7d; //0x82;
break; //6
case 0xb7:key_v=7;//P0=0xf8;break;//7
break;
case 0xde:key_v=8;//P0=0x80;break;//8
break;
case 0xdd:key_v=9;//P0=0x90;break;//9
break;
case 0xdb:key_v=0xa;//P0=0x88;break;//a
break;
case 0xd7:key_v=0xb;//P0=0x83;break;//b
break;
case 0xee:key_v=0xc;//P0=0xc6;break;//c
break;
case 0xed:key_v=0xd;//P0=0xa1;break;//d
break;
case 0xeb:key_v=0xe;//P0=0x86;break;//e
break;
case 0xe7:key_v=0xf;//P0=0x8e;break;//f
break;
default:key_v= 0xff; //初始化
break;
}
return(key_v);
}
void keyscan(void)//键盘扫描函数，使用行列反转扫描法
{
uchar cord_h,cord_l,key,i;//行列值
P1=0x0f; //行线输出全为0
cord_l=P1&0x0f; //cord_h=P1&0x0f; //读入列线值
if(cord_l!=0x0f) //先检测有无按键按下
{
delay(100); //去抖
if(cord_l!=0x0f)
{
cord_l=P1&0x0f; //读入列线值
P1=cord_l|0xf0; //输出当前列线值
cord_h=P1&0xf0; //读入行线值
key=cord_h+cord_l;//键盘最后组合码值
for(i=5;i>0;i--)
{
led_data[i]=led_data[i-1];
}
led_data[0]=key_v_fun(key);
}
}
}
void delay(uint i)//延时函数
{
while(i--);
}
key_4x4.h-----------------------------------------------------------
#ifndef _KEY_4X4_H
#define _KEY_4X4_H
#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
void keyscan(void);
uchar key_v_fun(uchar key_n);
#endif
--------------------------------------------------------------------------------------------------------------------------------------------
#include "dispaly.h"
//共阳极字符０~Ｆ的段码
//uchar dis[16]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e };
extern uchar led_data[10];
uchar led_code[]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90};//数码管段选码，0~9
uchar led_bit[]={0x01,0x02,0x04,0x08,0x10,0x20};//数码管位选码，分别对应1~6
void dispaly(void)
{
uchar i;
uint k;
for(i=0;i<6;i++)//将上述分离出来的每位整数显示出来
{
//P2=led_bit[i];//位选数码管
P0=led_code[led_data[i]];//输出段码
P2=led_bit[5-i];//位选数码管
for(k=0;k<1000;k++);///每位数码管之间的延时
}
}
----------------------------------------------------------
#ifndef _PRINTLED_H
#define _PRINTLED_H
#include <reg52.h>
#include "key_4x4.h"
void printled();
#endif
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