.实用文档.51单片机串口通信，232通信，485通信，程序代码1：232通信#include<reg52.h>#defineucharunsignedchar#defineuintunsignedintucharflag,a,i;ucharcodetable[]="iget";voidinit(){TMOD=0X20;TH1=0XFD;TH0=0XFD;TR1=1;REN=1;SM0=0;SM1=1;EA=1;ES=1;}voidmain(){init();while(1){if(flag==1){ES=0;for(i=0;i<6;i++){SBUF=table[i];while(!TI);TI=0;}SBUF=a;while(!TI);TI=0;ES=1;flag=0;}}}voidser()interrupt4{RI=0;a=SBUF;flag=1;}代码2：485通信#include<reg52.h>#include"1602.h"#defineucharunsignedchar#defineuintunsignedintunsignedcharflag,a,i;ucharcodetable[]="iget";voidinit(){TMOD=0X20;TH1=0Xfd;TL1=0Xfd;TR1=1;REN=1;SM0=0;SM1=1;EA=1;ES=1;}voidmain(){init_1602();init();while(1){if(flag==1){display(0,a);}}}voidser()interrupt4{RI=0;a=SBUF;flag=1;}