receive.c

2232接收 232接收 232接收

#include<stdio.h>
#include<reg51.h>
#include<math.h>
#include<stdlib.h>

#define uchar unsigned char
#define uint  unsigned int

//uchar xdata astring[1]={2};

uchar data astring;

void main(void){
     EA=1;ES=1;
	 PS=1;
	 
	 TMOD=0x21;    //定时器方式设置

//定时器1为9 600bits/S波特率发生器
	 TL1=0xfd;
	 TH1=0xfd;
	 SCON=0x50;	 //SM1=1;即方式1，波特率可变；REN=1; 允许接收;RI=0可以
	
	 TR1=1;
	         
	 RI=0;
	 while(1){}
  }

serial() interrupt 4 using 2 {

		 uchar i=0;
		  //软件清除中断标志位,允许下次中断
		 while(i<1){
		 astring=SBUF;
		 RI=0;
		 astring=SBUF;
		 P2=astring;

		 i++;
		 }
}