串行_查询_主机_共阴.c

单片机双机,多机串口通信 通过编译运行 供大家参考

//computer11.c
#include <stdio.h>
#include <reg51.h>
#include <intrins.h>
unsigned  char code ledk[17]={0x3f,0x06,0x5b,0x4f,0x66,0x6D,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x00};
unsigned char  key,buf[10],flag,sdata[10]={9,8,7,6,5,4,3,2,1,0};
sbit P37=P3^7;sbit clk=P0^7;sbit sda=P0^6;               //74LS164
void delay(unsigned int n)
{unsigned int i;
 for(i=0;i<n;i++);}
/*void hextodec()
 {unsigned int xx;
  disp[3]=disp_value/1000; xx=disp_value%1000;
  disp[2]=xx/100;          xx=xx%100;
  disp[1]=xx/10;           
  disp[0]=xx%10;   }*/
void shift(unsigned char dx)
{static unsigned char d;
   unsigned char j=0;
    d=dx;
   	while(j<8)
	{if((d&0x80)!=0) sda=1;
       else  sda=0;
	   clk=0;clk=1;
	   d<<=1;j++;}  }
//================
unsigned char get_char(void)
{unsigned char	key_code;
  if (P37!=0 )key_code=0xff;else if (P37==0)key_code=0;
  return(key_code);}
void key_func(key)
{switch(key)
  {case  0: flag=1;break;
   default:	break;}}
//=================
void receive()
{unsigned char i;
 for(i=0;i<6;i++)
  {do{}while(!RI);RI=0;buf[i]=SBUF;}}
void send()
{unsigned char i; 
 for(i=0;i<10;i++){SBUF=sdata[i];while(!TI);TI=0;}}
//==================
void main(void)
{unsigned char i; 
  flag=0;TMOD=0x20;TH1=0xcc;TL1=0xcc;TR1=1;SCON=0x50;P2=0xee;
  while(1)
     {P2=0xee;
	  key=get_char( );
      key_func(key);
	  if(flag==1){do{SBUF=0x0a;while(!TI);TI=0;
                     do{}while(!RI);RI=0;buf[0]=SBUF;} while(buf[0]!=0x0b);
                  shift(ledk[buf[0]]|0x80);delay(50000);
                  send();
                  //for(i=0;i<10;i++){shift(ledk[sdata[i]]);delay(50000);}
                  shift(0);
                  receive();
                  for(i=0;i<6;i++){shift(ledk[buf[i]]);delay(50000);}
                  shift(0);
                  delay(65000);delay(65000);delay(65000);
				  delay(65000);delay(65000);delay(65000);}                                          
      else shift(0);
	}		   
 }