双机串口通信

来源：互联网发布：linux 进程网络流量编辑：程序博客网时间：2024/05/22 01:37

内容描述：

有A.B两个机，以方式一进行串口通信，其中A机发送信息，B机接收信息。双方的晶振频率为11.0592MHZ,通信波特率为9600。通信协议：通信开始时，A机首先发送一个启动信号AA，B机接收到后发送一个应答信号BB表示同意接收。

附仿真电路图：
这里写图片描述

C语言：

#include <reg52.h>#define uchar   unsigned charvoid time(unsigned int _time);      //延时函数void InitArray();                   //初始化数组void SendData();                    //发送数据void Receive();                     //接收数据sbit    P10=P1^0;sbit    P17=P1^7;uchar databuff[32]      _at_ 0x30;uchar bufR[32]          _at_ 0x50;void InitArray(){    uchar i;    for(i=0;i<32;i++)    databuff[i]=i;}void init(){    SCON=0X50;                      //串口工作在方式1    PCON=0;                         //波特率不加倍    TMOD=0X20;    TH1=0XFd;    TL1=0XFd;    TCON=0X40;}void SendData(){    uchar jiaoyan;                  //校验和    uchar i;    leap:        P2=0XAA;                   //显示AA，表示就绪，等待它机        SBUF=0XAA;          while(TI==0);        TI=0;        while(RI==0);        RI=0;        if(SBUF!=0xbb)  goto leap;        P2=0XBB;        time(20);    leap1:jiaoyan=0;    //发送数据        for(i=0;i<32;i++)    {        P2=databuff[i];        time(200);        SBUF=databuff[i];        jiaoyan+=databuff[i];        while(TI==0);            TI=0;    }    if(P17)    {        P2=jiaoyan;        time(200);        SBUF=jiaoyan;    }    else    {        jiaoyan++;        P2=jiaoyan;        time(200);        SBUF=jiaoyan;    }        while(TI==0);        TI=0;        while(RI==0);        RI=0;        P2=SBUF;        time(200);        //校验是否正确    if(SBUF==0) goto leap1;}void Receive(){    uchar i,pf;    do{        //等待接收数据        while(RI==0);RI=0;        P2=SBUF;        time(200);    }while((SBUF^0XAA)!=0);    P2=0XBB;    time(200);    SBUF=0XBB;    while(TI==0);TI=0;    while(1)    {        pf=0;        for(i=0;i<32;i++)    {        //接收所有传递过来的数据        while(RI==0);        RI=0;        bufR[i]=SBUF;               P2=bufR[i];        time(200);        pf+=bufR[i];    }    P2=SBUF;    //判断接收数据是否等于校验和    if((SBUF^pf)==0)    {        P2=0;        time(200);        SBUF=0X00;        while(TI==0);TI=0;    }    else    {        P2=0XFF;        time(200);        SBUF=0XFF;        while(TI==0);TI=0;    }}    }void main(){    uchar count=0;    time(1);    init();    InitArray();    if(P10)    {                               SendData();         //传送端    }    else    {        Recive();          //接收端    }    while(1);}void time(unsigned int _time){    uchar ucCounter,i;    for(ucCounter=0;ucCounter<110;ucCounter++)    for(i=0;i<_time;i++);}

汇编：

ORG 0000HBUFS    EQU 30HBUFR    EQU 50HNUMB    EQU 10HSUMS    EQU 7EHSUMR    EQU 7FHMAIN:     LCALL InitArray    LCALL DELAY    LCALL InitUart MAIN2:         JB P1.0,SEND        LCALL RECEIVE HERE:   SJMP HERESEND:   LCALL SEND1HERE1:  SJMP HERE1InitArray:     MOV R2,#NUMB    MOV R0,#BUFS    MOV A,#00HLOOP:     MOV @R0,A    INC R0      INC A           DJNZ    R2,LOOP    RET InitUart:    MOV SCON,#50H    MOV TMOD,#20H;    MOV PCON,#00H;     MOV TH1,#0FDH     MOV TCON,#40H;     RETSEND1:    MOV P2,#0AAH        MOV SBUF,#0AAH LOOP1: JNB TI,LOOP1        CLR TILOOP2:    JNB RI,LOOP2     CLR RI    MOV A,SBUF    CJNE A,#0BBH,LOOP2     MOV P2,#0BBH     LCALL DELAYSEND2:    MOV SUMS,#00H     MOV R0,#BUFS     MOV R2,#NUMBLOOP3:      MOV A,@R0     MOV P2,A    LCALL DELAY     MOV SBUF,ALOOP4:     JNB TI,LOOP4    CLR TI    ADD A,SUMS     MOV SUMS,A     INC R0     DJNZ R2,LOOP3LOOP5:     JB P1.7,LOOP6    ADD A,#01H     MOV SUMS,ALOOP6:     MOV P2,A    LCALL DELAY     MOV SBUF,ALOOP7:     JNB TI,LOOP7    CLR TI LOOP8:     JNB RI,LOOP8    CLR RI    MOV P2,SBUF     LCALL DELAY     MOV A,SBUF    CJNE A,#00H,LOOP9ENDS: RETLOOP9: LJMP SEND2RECEIVE:    JNB RI,RECEIVE     CLR RI    MOV P2,SBUF     LCALL DELAY     MOV A,SBUF    CJNE A,#0AAH,RECEIVE     MOV P2,#0BBH    LCALL DELAY    MOV SBUF,#0BBH LOOP11:     JNB TI,LOOP11    CLR TILOOP12:     MOV SUMR,#00H    MOV R1,#BUFR    MOV R3,#NUMBLOOP13:     JNB RI,LOOP13    CLR RI      MOV P2,SBUF    LCALL DELAY    MOV A,SBUF    MOV @R1,A    ADD A,SUMR    MOV SUMR,A    INC R1      DJNZ R3,LOOP13    MOV P2,SUMRLOOP14:     JNB RI,LOOP14    CLR RI      MOV P2,SBUF    LCALL   DELAY    MOV A,SBUF    CJNE A,SUMR,LOOP16    MOV P2,#00H    LCALL   DELAY    MOV SBUF,#00HLOOP15:     JNB TI,LOOP15    CLR TI      RET LOOP16:     MOV P2,#0FFH    LCALL   DELAY    MOV SBUF,#0FFHLOOP17:     JNB TI,LOOP17    CLR TI    LJMP LOOP12DELAY:    MOV R7,#04H    DL: MOV R5,#0FFH    DL1: MOV R5,#0FFH    DL5: DJNZ R5,DL5    DJNZ R6,DL1    DJNZ R7,DL    RET     END

效果图：

这里写图片描述

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