实现一个单片机串行接口双机通讯测试系统，我的这个为什么没有效果

ID:751978 · 发表于 2020-5-14 19:10

//??????н???
#include <reg51.h>
code unsigned char tab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
void main()
{
unsigned char i;
SCON=0x40;
PCON=0X00;
TMOD=0X20;
TH1=0XFD;
TL1=0XFD;
TR1=1;
while(1)
{
REN=1;
while(RI==0);

i=SBUF;
P0=tab[ i];
RI=0;

}
}

ID:751978 · 发表于 2020-5-14 19:11

//??????н???
#include<reg51.h>
sbit S=P0^0;
unsigned char count;
key()
{
unsigned int k;
if(S==0)
{
for(k=0;k<1200;k++);
if(S==0){
count++;
if(count==10)count=0;
while(!S);
}
}
}

main()
{

TMOD=0X20;
TH1=0XFD;
TL1=0xfd;
TR1=1;
SCON=0x40;
PCON=0x00;
count=0;
while(1)
{
key();
SBUF=count;
while(!TI);
TI=0;

}
}

ID:213173 · 发表于 2020-5-14 22:22

whaless 发表于 2020-5-14 19:11
//??????н???
#include
sbit S=P0^0;

#include<reg51.h>
sbit S=P0^0;
unsigned char count;
void key()
{
      unsigned int k;
      if(S==0)
      {
            for(k=0;k<1200;k++);
            if(S==0)
            {
                     count++;
                     if(count>=10)
                              count=0;
                     while(!S);
                     SBUF=count;
                     while(!TI);
                     TI=0;
            }
      }
}

void main()
{
      TMOD=0X20;
      SCON=0x50;
      PCON=0x00;
      TH1=0xfd;
      TL1=0xfd;
      TR1=1;
      count=0;
      while(1)
      {
            key();
      }
}
/******************************************/
#include <reg51.h>
code unsigned char tab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
void main()
{
      unsigned char i;
      SCON=0x50;
      PCON=0X00;
      TMOD=0X20;
      TH1=0xfd;
      TL1=0xfd;
      TR1=1;
      P0=0xbf;//'-'
      while(1)
      {
            if(RI==1)
            {
                     RI=0;
                     i=SBUF;
                     P0=tab[ i];
            }
      }
}

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