51单片机心形灯实现串口通信编程

心形灯原理图

编译软件：Keil uVision5

（如有需要可点此链接下载：https://download.csdn.net/download/qq_36931762/11343174）

单片机程序下载软件：STC-ISP

（如有需要可点此链接下载：https://download.csdn.net/download/qq_36931762/11343157）

程序代码：

灯状态处于0亮1灭

发送方：

#include

sbit k1=P3^2;

sbit k2=P3^3;

sbit k3=P3^4;

sbit k4=P3^5;

#define LED1  P0

#define LED2  P2

void UsartInit(){

SCON=0x50;

TMOD=0x20;

PCON=0x80;

TH1=0xF4;

TL1=0xF4;

ES=1;

EA=1;

TR1=1;

}

void delay(unsigned int ms)

{

unsigned int i,j;

for(i=0;i for(j=0;j<110;j++);

}

unsigned char keyscan(void){

unsigned char key='.';

if (k1==0)

{

delay(1);

if(k1==0)

{

key='1';

while(!k1);

}

}

if (k2==0)

{

delay(1);

if(k2==0)

{

key='2';

while(!k2);

}

}

if (k3==0)

{

delay(1);

if(k3==0)

{

key='3';

while(!k3);

}

}

if (k4==0)

{

delay(1);

if(k4==0)

{

key='4';

while(!k4);

}

}

return key;

}

void Tras(unsigned char key)

{

SBUF=key;

while(!TI);

TI=0;

}

void main()

{

unsigned char key;

UsartInit();

while(1)

{

key=keyscan();

if(key!='.')

{

Tras(key);

key='.';

}

}

}

接收方：

#include

#define uchar unsigned char;

#define uint unsigned int;

uchar receiveData;

uchar flag;

uchar code table[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f,0xff};

sbit LED17=P3^6;

void UsartInit(){

SCON=0x50;

TMOD=0x20;

PCON=0x80;

TH1=0xF4;

TL1=0xF4;

ES=1;

EA=1;

TR1=1;

}

void Delay(unsigned int a){

unsigned char b;

for(;a>0;a--){

for(b=110;b>0;b--);

}

}

void AllOn(){

P0=0x00;

P2=0x00;

LED17=0;

}

void AllDown(){

P0=0xff;

P2=0xff;

LED17=1;

}

void RFlow(){

int i;

for(i=0;i<=7;i++){

P2=table[i];

Delay(300);

}

P2=table[8];

for(i=7;i>=0;i--){

P0=table[i];

//P2=table[i];

Delay(300);

}

P0=table[8];

LED17=0;

Delay(300);

LED17=1;

}

void LFlow(){

int i;

for(i=0;i<=7;i++){

P0=table[i];

//P2=table[i];

Delay(300);

}

P0=table[8];

for(i=7;i>=0;i--){

//P0=table[i];

P2=table[i];

Delay(300);

}

P2=table[8];

LED17=0;

Delay(300);

LED17=1;

}

void main(){

UsartInit();

while(1)

{

switch(receiveData)

{

case '1': AllOn();break;

case '2': AllDown();break;

case '3': LFlow();break;

case '4': RFlow();break;

default:break;

}

}

}

void Usart() interrupt 4{

receiveData=SBUF;

RI=0;

P0=0xff;

P2=0xff;

LED17=1;

}