1、/-主機程序/-#include<reg52.h>#define uchar unsigned char#define uint unsigned int#define slave 0x03#define BN 4 uchar code tbufBN=0x3f,0x5b,0x66,0x7d;/uchar code tab=0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F;void init()/初始化TR1=1;TH1=0xf3;TL1=0xf3;TMOD=0x20;SM0=0;SM1=1;SM2=1;REN=1; void err

2、or() /錯誤TB8=1;SBUF=0xf0;while(TI!=1);TI=0;void send_date(unsigned char data1) SBUF = data1; /將待發送的字符送入發送緩沖器while(!TI); /等待發送完成TI = 0; /發送中斷標志請0/* /向串口發送一個字符串，strlen為該字符串長度 void send(uchar *str,uint strlen) uchar p=0;uint k; do for(k=0;k<strlen;k+) send_date(*(str + k); p+=*(str + k); send_date(p)

3、;while(!RI);RI=0; while(SBUF!=0);*/void send() /發送數據并校驗和uchar i;uint p;dop=0; for(i=0;i<BN;i+)send_date(tbufi);p+=tbufi;P1=0xf0;while(!RI);RI=0; send_date(p); P1=0x00;while(!RI);RI=0; while(SBUF!=0); void chuankou(uchar add,uchar command) /串口函數 (地址，命令)uchar a;while(1)send_date(add); while(!RI);RI

4、=0; if(SBUF!=add)error();elseTB8=0; send_date(command); while(!RI);RI=0; a=SBUF;if(a&0x80)=0x80)error();else if(a&0x01)=0x01) /從機準備好接收并主機發送數據P1=0xef;send(/*tbuf,BN*/);TB8=1; void main()init();chuankou(slave,0x01);while(1);/-從機程序/-#include<reg52.h>#define uchar unsigned char#define uint

5、 unsigned int#define slave 0x03#define BN 4 uchar code tab=0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F;uchar rbufBN;bit rready; void delay(void) /誤差 0us unsigned char a,b,c; for(c=167;c>0;c-) for(b=171;b>0;b-) for(a=16;a>0;a-);void init() /初始化 TR1=1;TH1=0xf3;TL1=0xf3;TMOD=0x20;SM0=0;S

6、M1=1;SM2=1;REN=1; EA =1; ES =1;P2=0xff; void error() /錯誤SM2=1;ES=1; void send_date(unsigned char data1) /發送字符SBUF = data1; /將待發送的字符送入發送緩沖器while(!TI); /等待發送完成TI = 0; /發送中斷標志請0void receive() /接收并校驗和uchar a,i,p;rready=0;while(1)p=0; for(i=0;i<BN;i+)while(!RI);RI=0;rbufi=SBUF;a=SBUF;P2=a;p+=rbufi;delay();send_date(0); P2=tab9; while(!RI);RI=0; if(SBUF=p)send_date(0x00);break;elsesend_date(0xff); void main()init();while(1)rready=1;void ssio()interrupt 4uchar a; ES=0; RI=0;if(SBUF!=slave)error(); goto reti; else send_date(slave);while(!RI);RI=0;a=SBUF;SM2=0;if(a!=0x01)&&