基于51单片机+TM1640或者74hc573 非同一端口数码管显示程序 -

#include <STC12C5A.H>
#include "intrins.h" //包含_nop_()指令头文件
/********************定义控制端口**********************/
sbit DIN=P4^1; //定义DIN数据端口
sbit CLK=P3^7; //定义CLK数据端口
sbit HH1 = P2^4;
sbit HH2 = P2^3;
sbit HH3 = P2^2;
sbit HH4 = P2^1;
sbit LL1 = P2^0;
sbit LL2 = P0^7;
sbit LL3 = P0^6;
sbit LL4 = P0^5;
unsigned char KeyValue = 20;//按键值显示-
/********************定义数据*************************/
//共阴数码管段选表
unsigned code tabel[]= {
// 1 2 3 4 5 6 7 8
0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07, 0x7F,
//9 0 A B C D E F H L
0x6F, 0x3F, 0x77, 0x7C, 0x39, 0x5E, 0x79, 0x71, 0x76, 0x38,
//n u - 熄灭
0x37, 0x3E, 0x40, 0x00 };
/********************延时函数，延时nms******************/
void delay(unsigned z)
{
unsigned x,y;
for(x=z;x>0;x--)
for(y=300;y>0;y--);
}
/*====================================
函数：KeyScan()
参数：无
返回值：无
描述：4*4矩阵键盘与独立键盘扫描
按键按下KeyValue全局变量值发生相应变化
====================================*/
char KeyScan(void) //行列扫描
{
HH1 = 0;
if (!LL1) KeyValue =0;
if (!LL2) KeyValue =1;
if (!LL3) KeyValue =2;
if (!LL4) KeyValue =3;
HH1 = 1;
HH2 = 0;
if (!LL1) KeyValue =4;
if (!LL2) KeyValue =5;
if (!LL3) KeyValue =6;
if (!LL4) KeyValue =7;
HH2 = 1;
HH3 = 0;
if (!LL1) KeyValue = 8;
if (!LL2) KeyValue = 9;
if (!LL3) KeyValue = 10;
if (!LL4) KeyValue = 11;
HH3 = 1;
HH4 = 0;
if (!LL1) KeyValue =12;
if (!LL2) KeyValue =13;
if (!LL3) KeyValue =14;
if (!LL4) KeyValue =15;
HH4 = 1;
HH1=1;
if(!HH1) KeyValue =16;
HH2=2;
if(!HH2) KeyValue =17;
HH3=3;
if(!HH3) KeyValue =18;
HH4=4;
if(!HH4) KeyValue =19;
return 255; //没有按键，就返回 255
}
/********************Start函数*************************/
void I2CStart()
{
DIN=1;
CLK=1;
delay(2);
DIN=1;
delay(2);
DIN=0;
delay(4);
CLK=0;
delay(2);
}
/********************Stop函数*************************/
void I2CStop()
{
CLK=1;
delay(2);
DIN=0;
delay(2);
DIN=1;
delay(2);
CLK=0;
DIN=0;
}
/***************发送8bit数据，从低位开始**************/
void I2CWritebyte(unsigned char oneByte)
{
unsigned char i;
for(i=0;i<8;i++)
{
CLK=0;
if(oneByte&0x01)
DIN=1;
else
DIN=0;
delay(3);
CLK=1;
oneByte=oneByte>>1;
}
CLK=0;
delay(4);
DIN=0;
delay(2);
}
void main()
{
while(1){
unsigned char i;
I2CStart();
I2CWritebyte(0x40); //数据命令设置：普通模式，地址自动加一
I2CStop();
I2CStart();
I2CWritebyte(0xc0); //地址命令设置：初始地址00H
for(i=0;i<1;i++) //发送16位显示数据
{
KeyScan();//20个按键键盘扫描
I2CWritebyte(tabel[KeyValue]); //显示按键值
}
I2CStop();
I2CStart();
I2CWritebyte(0x8c); //显示控制：显示开，脉冲宽度设为11/16
I2CStop();
}
}

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#include<reg51.h>
#include <intrins.h>//包含移位标准库函数头文件
#define uint unsigned int
#define uchar unsigned char
sbit DU = P2^6;//数码管段选
sbit WE = P2^7;//数码管段选
uchar num;//数码管显示的值
uchar KeyValue = 20;//按键值显示-
//共阴数码管段选表
uchar code tabel[]= {
//0 1 2 3 4 5 6 7 8
0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07, 0x7F,
//9 A B C D E F H L
0x6F, 0x77, 0x7C, 0x39, 0x5E, 0x79, 0x71, 0x76, 0x38,
//n u - 熄灭
0x37, 0x3E, 0x40, 0x00 };
/*====================================
函数： delay(uint z)
参数：z 延时毫秒设定，取值范围0-65535
返回值：无
描述：12T/Fosc11.0592M毫秒级延时
====================================*/
void delay(uint z)
{
uint x,y;
for(x = z; x > 0; x--)
for(y = 114; y > 0 ; y--);
}
/*====================================
函数：KeyScan()
参数：无
返回值：无
描述：4*4矩阵键盘与独立键盘扫描
按键按下KeyValue全局变量值发生相应变化
====================================*/
sbit HH1 = P3^0;
sbit HH2 = P3^1;
sbit HH3 = P3^2;
sbit HH4 = P3^3;
sbit LL1 = P3^4;
sbit LL2 = P3^5;
sbit LL3 = P3^6;
sbit LL4 = P3^7;
char KeyScan(void) //行列扫描
{
HH1 = 0;
if (!LL1) KeyValue =0;
if (!LL2) KeyValue =1;
if (!LL3) KeyValue =2;
if (!LL4) KeyValue =3;
HH1 = 1;
HH2 = 0;
if (!LL1) KeyValue =4;
if (!LL2) KeyValue =5;
if (!LL3) KeyValue =6;
if (!LL4) KeyValue =7;
HH2 = 1;
HH3 = 0;
if (!LL1) KeyValue = 8;
if (!LL2) KeyValue = 9;
if (!LL3) KeyValue = 10;
if (!LL4) KeyValue = 11;
HH3 = 1;
HH4 = 0;
if (!LL1) KeyValue =12;
if (!LL2) KeyValue =13;
if (!LL3) KeyValue =14;
if (!LL4) KeyValue =15;
HH4 = 1;
return 255; //没有按键，就返回 255
}
void main()//main函数自身会循环
{
WE = 1;//打开位选锁存器
P0 = 0XFE; //1111 1110
WE = 0;//锁存位选数据
DU = 1;//打开段选锁存器
while(1)
{
KeyScan();//20个按键键盘扫描
P0 = tabel[KeyValue];//显示按键值
}
}

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