51单个超声波测距源码+串口发送到上位

ID:416059 · 发表于 2018-11-3 21:17

#include<reg52.h>
#include <intrins.h>
#include<stdio.h>
#define uint unsigned int
#define uchar unsigned char

sbit rs=P3^5; //1602Ö¸áîÑ¡×Å¿ØÖÆ
sbit rw=P3^6; //1602¶áD′¿ØÖÆ
sbit en=P3^4; //1602ê1Äü¿ØÖÆ
sbit trig1=P1^0; //3¬éù1·￠
sbit echo1=P3^2; //3¬éù1½ó

sbit led1=P1^7;
uchar ii,shuju;
bit flag1;  //′￥·￠±êÖ¾

uchar count,count1;
long int distance,distance1;

unsigned char code table[ ]={"0123456789"}; //1206ÏÔê¾×Ö·û¶¨òå

void delay(uint n)    //Ñóê±oˉêy1
{
uint x,y;
for(x=n;x>0;x--)
for(y=110;y>0;y--);
}

void delayt(uint x) //Ñóê±oˉ2
{
uchar j;
while(x-- > 0)
{
            for(j = 0;j < 125;j++)
      {
      ;
      }
}
}

void lcd_wcom(uchar com) //1206D′Ãüáî
{
rs=0;
rw=0;
P0=com;
delay(5);
en=1;
en=0;
}

void lcd_wdat(uchar dat) //1206D′êy¾Y
{
rs=1;
rw=0;
P0=dat;
delay(5);
en=1;
en=0;
  }

void lcd_init()       //12063õê¼
{
lcd_wcom(0x38);
lcd_wcom(0x0c);
lcd_wcom(0x06);
lcd_wcom(0x01);  //ÇåÆá
}

void lcd_xianshi()    //LCDÏÔê¾
{
lcd_wcom(0x80+0x40);
      lcd_wdat('J');
      lcd_wdat('u');
lcd_wdat(' ');
      lcd_wdat('L');
      lcd_wdat('i');
lcd_wdat(' ');
      lcd_wdat('L');
      lcd_wdat(':');
      lcd_wcom(0x80+0x4c);
      lcd_wdat('.');
      lcd_wcom(0x80+0x4e);
      lcd_wdat('c');
      lcd_wdat('m');

}

void init_t0() //¶¨ê±Æ÷3õê¼
{
TMOD=0x21;
TL0=0x66;
TH0=0xfc;
ET0=1;
//TMOD=0X20;
   //SCON=0x50;
//TCON=0x40;
//PCON=0x80;
TH1=0xfD;
TL1=0xfD;
SM0=0;
SM1=1;
REN=1;
TR1=1;
ES=1;
EA=1;
TI=1;

}

void trigger() //3¬éù·￠
{
trig1=0;
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
   trig1=1;
}

void init_measuring()//3¬éù¶Ë¿ú3õê¼
{
      trig1=1;
      echo1=1;
      count=0;
}

void measuring()  //¾ààë2aêÔ
{
      uchar l;
      uint h,y;
      TR0 = 1;
      while(echo1==1)
{
      ;
}
      TR0 = 0;
      l = TL0;
      h = TH0;
      y = (h << 8) + l;
      y = y - 0xfc66;
      distance = y + 1000 * count;
      TL0 = 0x66;
      TH0 = 0xfc;
      delayt(20);//Ô-30
      distance = 3453* distance / 20000;

}

void display(uint x) //ÏÔê¾¼ÆËã
{
      uchar qian,bai,shi,ge;
      qian=x/1000;
      bai=(x/100)%10;
      shi=(x/10)%10;
      ge=x%10;

      lcd_wcom(0x80+0x49);
      lcd_wdat(table[qian]);
      lcd_wdat(table[bai]);
      lcd_wdat(table[shi]);
      lcd_wcom(0x80+0x4d);
      lcd_wdat(table[ge]);
}

void main()    //Ö÷oˉêy
{ lcd_init(); //òo¾§3õê¼
init_t0();//¶¨ê±Æ÷03õê¼

init_measuring();  //3¬éù¶Ë¿ú3õê¼
      while(1)
      {
        lcd_xianshi(); //1206×Ô¶¨ÏÔê¾
        trigger(); //3¬éù′￥·￠Æô¶ˉ
         while(echo1==0)
         {
           ;
         }
measuring();
         display(distance); //ÏÔê¾
         init_measuring(); //3¬éù¶Ë¿ú3õê¼
         //delayt(1);  //¼ä¸ô600ms
SBUF= 60;
while(!TI);
TI=0;
   SBUF= distance/1000%10+48;
while(!TI);
TI=0;
SBUF= distance/100%10+48;
while(!TI);
TI=0;
SBUF= distance/10%10+48;
while(!TI);
TI=0;
SBUF= distance%10+48;
while(!TI);
TI=0;
SBUF= 62;
while(!TI);
TI=0;
//SBUF=10;
// while(!TI);
// TI=0;
      }
}

void T_0()interrupt 1
{
      TF0 = 0;
      TL0 = 0x66;
      TH0 = 0xfc;
      count++;
      if(count==18)
      {
      TR0 =0;
      TL0 = 0x66;
      TH0 = 0xfc;
      count = 0;
      }
}

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