单片机串口通信点亮小灯

ID:687128 · 发表于 2020-4-10 21:31

我也是单片机小白  刚接触单片机不久  今天学习了串口通信通过串口通信来控制小灯的点亮  分享给大家再接再厉
#include<reg52.h>

typedef unsigned char u8;
typedef unsigned int u16;

u8 i;

sbit led0=P2^0;
sbit led1=P2^1;
sbit led2=P2^2;
sbit led3=P2^3;
sbit led4=P2^4;
sbit led5=P2^5;
sbit led6=P2^6;
sbit led7=P2^7;

void UsartInit()
{
      TMOD=0x20;
      TH1=0xF3;
      TL1=0XF3;
      TR1=1;
      PCON=0X80;
      ES=1;
      EA=1;
      SCON=0X50;
}

void main()
{
      UsartInit();
      while(1);
}

void Usart() interrupt 4
{
      u8 receiveData;
      receiveData=SBUF; //???????????
      i=SBUF;
      switch(i)
      {
            case'0' :led0=0;break;
            case'1' :led1=0;break;
            case'2' :led2=0;break;
            case'3' :led3=0;break;
            case'4' :led4=0;break;
            case'5' :led5=0;break;
            case'6' :led6=0;break;
            case'7' :led7=0;break;
      }
      RI=0; //????????ж???λ
      SBUF=receiveData; //???????????????????????????
      while(!TI);//??????????????
      TI=0; //????????ж???λ
}

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单片机串口通信点亮小灯

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