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下面是单片机主从串行通信的proteus仿真原理图(工程文件可到本帖附件中下载):
以上仿真完美实现了单片机双机通信.
单片机主从串行通信源程序如下:
- //#include<reg51.h>
- # include <STC12C5A60S2.h>
- # define uchar unsigned char
- # define vtime 6000 //定时3ms,一帧8*3=24ms,频率=40Hz
- # define sub1 0x11
- # define sub2 0x12
- sbit key1=P3^2;
- sbit key2=P3^3;
- uchar over_t=0;
- uchar addr=sub1,sum=0;
- //uchar i,j,temp,m=0x01;
- uchar code distable[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x00,0x40,0x09};
- //位选码表
- uchar code numi[]={0xfe,0xfd,0xfb,0xf7};
- //显示缓存
- uchar V_ram[]={17,16,16,0};
- uchar wi=0; //位选循环变量
- uchar rn=0; //接收循环变量
- uchar rxdv[3];
- void main( )
- {
- /* //m1:m0 00=标准; 01=推挽; 10=输入; 11=开漏输出
- P2M1 = 0X00;
- P2M0 = 0Xff;
- P1M1 = 0X00;
- P1M0 = 0Xff; //设定P2,P1推挽输出
- P3M1 = 0X0d;
- P3M0 = 0X02;
- */ //
- SCON = 0xd0;
- PCON = 0X80;
- TH1 = 0XFd;
- TL1 = 0XFd;
- IT0 = 1; // 中断0为边沿触发
- IT1 = 1; // 中断1为边沿触发
-
- TMOD = 0X21; //设定定时器0为16位计数方式
- TH0 = (65536-vtime )/256;
- TL0 = (65536-vtime )%256; //赋定时器0初值
- ET0 = 1; //开定时器0中断
- TR0 = 1; //启动定时器0计数
- TR1 = 1; //启动定时器1计数
- SM2=1;
- if(key1==0)
- {
- addr=sub1;
- IE1 = 0; //中断1的源清零
- EX1 = 1; // 开启中断1
- }
- if(key2==0)
- {
- addr=sub2;
- IE0 = 0; //中断0的源清零
- EX0 = 1; // 开启中断0
- }
- V_ram[0]=addr;
- ES=1;
- EA = 1; //开总中断
- while(1);
- }
- void t0_isp() interrupt 1
- {
- uchar dm,wx;
- TH0 = (65536-vtime )/256;
- TL0 = (65536-vtime )%256; //赋定时器0初值
- dm=distable[V_ram[wi]]; //取显示段码
- wx=numi[wi]; //取位选码
- P1=0xff; //关显示
- P2=dm; //段码赋给P0口
- P1=wx; //点亮位选的那个数码管
- wi++;
- if(wi==4)wi=0;
- if(over_t != 0)over_t--;
- }
- void int0_isp() interrupt 0
- {
- addr=sub1;
- V_ram[0]=addr;
- EX0 = 0; // 关中断0
- IE1 = 0; //中断1的源清零
- EX1 = 1; //开中断1
- }
- void int1_isp() interrupt 2
- {
- addr=sub2;
- V_ram[0]=addr;
- EX1 = 0; // 关中断1
- IE0 = 0; //中断0的源清零
- EX0 = 1; //开中断0
- }
- void uart_isp( ) interrupt 4
- {
- if(RI==1)
- {
- over_t=100;
- RI=0;
- rxdv[rn]=SBUF;
- //V_ram[1]=rn;
- if((rn==0)&&(addr==SBUF))
- {
- SM2=0;
- rn++;
- // V_ram[1]=rn;
- sum=SBUF;
- return;
- }
- if(rn==2)
- {
- if(sum==SBUF)
- {
- V_ram[1]=rxdv[1]/100;
- if(V_ram[1]==0)V_ram[1]=0x10;
- V_ram[2]=(rxdv[1]%100)/10;
- if((V_ram[1]==16)&&(V_ram[2]==0x00))V_ram[2]=0x10;
- V_ram[3]=(rxdv[1]%100)%10;
- TB8=0;
- SBUF=addr;
- }
- // V_ram[1]=rn;
- rn=0;
- SM2=1;
- return;
- }
- if(rn==1)
- {
- rn++;
- sum=sum+SBUF;
- V_ram[1]=SBUF;
- …………限于本文篇幅 余下代码请从51黑下载附件…………
复制代码
最后给大家分享一些我们老师给的一些经典的单片机程序源码, 一共有十多个.都有详细的注释,然大家快速的理解每一行代码的意思。而且有proteus仿真原理图。大家可以直接验证程序的对错.
本系列所有源码打包下载地址(含proteus仿真工程文件和源程序):
http://www.51hei.com/bbs/dpj-82474-1.html
本例程下载:
主从串行通信.rar
(88.38 KB, 下载次数: 47)
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