DS18B20源碼和proteus仿真

ID:144307 · 發表于 2016-10-25 14:36

仿真和源碼下載：

自尊版--最后調試.rar (50.08 KB, 下載次數: 26)

#include<reg51.h>
#define uint unsigned int
#define uchar unsigned char
uchar xs[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xbf,0xc6,0xbf};
uchar location[]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80};
sbit DQ=P3^4;
float c;
uchar flag;
void delay(uchar t)
{
      while(t--);
}
void delay1(uint a)
{
      uint i,j;
      for(i=0;i<a;i++)
            for(j=0;j<120;j++);
}
void init_ds18b20()
{
      uchar n;
      DQ=1;
      delay(8);
      DQ=0;
      delay(110);
      DQ=1;
      delay(25);
      n=DQ;
      delay(4);
}
void write_byte(uchar dat)
{
      uchar i;
      for(i=0;i<8;i++)
      {
            DQ=0;
            DQ=dat&0x01;
            delay(5);
            DQ=1;
            dat=dat>>1;
      }
      delay(5);
}
uchar read_byte()
{
      uchar i,value=0x00;
      for(i=0;i<8;i++)
      {
            DQ=0;
            DQ=1;
            value=value>>1;
            delay(3);
            if(DQ)
            value=value|0x80;

            delay(4);
      }
      return value;
}
uchar readtemperature()
{
      uchar a,b,t;
      init_ds18b20();
      write_byte(0xcc);
      write_byte(0x44);
      delay1(20);
      init_ds18b20();
      write_byte(0xcc);
      write_byte(0xbe);
      a=read_byte();
      b=read_byte();
      c=0x0f&a;
      c*=0.0625;
      a>>=4;
      b<<=4;
      t=b+a;
      if(t>128)
      {
            t=~t+1;
            flag=1;
      }
      else
            flag=0;
      return t;
}
void display(uchar wei,uchar dat)
{
      P2=location[wei];
      if(wei==5)
            P0=xs[dat]&0x7f;
      else
            P0=xs[dat];
}
void main()
{
      uchar temp;
      while(1)
      {
            temp=readtemperature();
            if(flag==1)
            {
                     display(3,12);
                     delay1(5);
            }
            display(4,temp/10);
            delay1(5);
            display(5,temp%10);
            delay1(5);
            display(6,(int)(c*10)%10);
            delay1(5);
            display(7,11);
            delay1(5);
      }
}

ID:186368 · 發表于 2017-4-19 19:31

希望能用。，老鐵

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DS18B20源碼和proteus仿真

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