sfr p0=0x80;
　　　　　sfr p1=0x90;
　　　　　sfr p2=0xA0;
　　　　　sfr p3=0xB0;
      

　　　　　 sbit CLOCK=P2^7;
               sbit D_IN=P2^6;
               sbit D_OUT=P2^5;
               sbit _CS=P2^4;

 sbit dp=p1^5;

  sbit DQ=p0^6;      //定义DS18B20的通信口

               float code ldbc[]=      {0,0.04,0.08,0.12,0.16,0.2,0.24,0.28,0.32,0.36,0.38,0.44,0.48,0.52,0.56,0.6,0.64,0.68,0.72,0.76,              //K型热电偶在0-40度下对应的电压值，用于冷端补偿。
                         0.8,0.84,0.88,0.92,0.96,1.0,1.0,1.1,1.1,1.2,1.2,1.24,1.28,1.33,1.37,1.41,1.45,1.49,1.53,1.57};
               float code E_temp[]={0,0.3,0.5,0.8,1,1.3,1.5,1.8,2,2.3,2.5,2.8,3,3.3,3.5,3.8,4.1,4.3,4.6,4.8,
                        5.1,5.3,5.6,5.8,6.1,6.3,6.6,6.8,7.1,7.3,7.6,7.8,8.1,8.3,8.6,8.8,9.1,9.3,9.6,9.8,
                                    10.1,10.3,10.6,10.8,11.1,11.3,11.6,11.8,12.1,12.3,12.6,12.8,13.1,13.3,13.6,13.8,14.1,14.3,14.6,14.8,      //K型热电偶：在电压值对应下的温度值，用于非线性较正。
         15.1,15.3,15.6,15.8,16.1,16.3,16.6,16.8,17.1,17.3,17.6,17.8,18.1,18.3,18.6,18.8,19.1,19.3,19.6,19.8,
         20.1,20.3,20.5,20.8,21.0,21.3,21.5,21.8,22.0,22.3,22.5,22.8,23.0,23.3,23.5,23.8,24.0,24.3,24.5,24.8,
         25.0,25.2,25.5,25.7,26.0,26.2,26.5,26.7,27.0,27.2,27.5,27.7,28.0,28.2,28.4,28.7,28.9,29.2,29.4,29.7,
         29.9,30.2,30.4,30.7,30.9,31.2,31.4,31.6,31.9,32.1,32.4,32.6,32.9,33.1,33.4,33.6,33.9,34.1,34.3,34.6,
         34.8,35.1,35.3,35.6,35.8,36.1,36.3,36.5,36.8,37.0,37.3,37.5,37.8,38.0,38.3,38.5,38.7,39.0,39.2,39.5,
         39.7,40.0,40.2,40.4,40.7,40.9,41.2,41.4,41.7,41.9,42.2,42.4,42.6,42.9,43.1,43.4,43.6,43.9,44.1,44.3,
         44.6,44.8,45.1,45.3,45.6,45.8,46.0,42.3,46.5,46.8,47.0,47.3,47.5,47.7,48.0,48.2,48.5,48.7,49.0,49.2,
         49.4,49.7,49.9,50.2,50.4,50.7,50.9,51.1,51.4,51.6,51.9,52.1,52.4,52.6,52.8,53.1,53.3,53.6,53.8,54.0,
         54.3,54.5,54.8,55.0,55.3,55.5,55.7,56.0,56.2,56.5,56.7,57.0,57.2,57.4,57.7,57.9,58.2,58.4,58.6,58.9,
         59.1,59.4,59.6,59.8,60.1,60.3,60.6,60.8,61.1,61.3,61.5,61.8,62.0,62.3,62.5,62.7,63.0,63.2,63.5,63.7,
         64.0,64.2,64.4,64.7,64.9,65.2,65.4,65.6,65.9,66.1,66.4,66.6,66.8,67.1,67.3,67.6,67.8,68.0,68.3,68.5,
         68.8,69.0,69.3,69.5,69.7,70.0,70.2,70.5,70.7,70.9,87.2,71.4,71.7,71.9,72.1,72.4,72.6,72.8,73.1,73.3,
         73.6,73.8,74.1,74.3,74.5,74.8,75.0,75.3,75.5,75.8,76.0,76.2,76.5,76.7,77.0,77.2,77.4,77.7,77.9,78.2,
         78.4,78.6,78.9,79.1,79.4,79.6,79.8,80.1,80.3,80.6,80.8,81.0,81.3,81.5,81.8,82.0,82.3,82.5,82.7,83.0,
         83.2,83.5,83.7,83.9,84.2,84.4,84.7,84.9,85.1,85.4,85.6,85.9,86.1,86.3,86.6,86.8,87.1,87.3,87.6,87.8,
         88.0,88.3,88.5,88.8,89.0,89.2,89.5,89.7,90.0,90.2,90.4,90.7,90.9,91.2,91.4,91.6,91.9,92.1,92.4,92.6,
         92.9,93.1,93.3,93.6,93.8,94.1,94.3,94.5,94.8,95.0,95.3,95.5,95.7,96.0,96.2,96.5,96.7,97.0,97.2,97.4,
         97.7,97.9,98.2,98.4,98.6,98.9,99.1,99.4,99.6,99.9,100.1,100.3,100.6,100.8,101.1,101.3,101.5,101.8,102.0,102.3,
         102.5,102.8,103.0,103.2,103.5,103.7,104.0,104.2,104.5,104.7,104.9,105.2,105.4,105.7,105.9,106.1,106.4,106.6,106.9,107.1,
         107.4,107.6,107.8,108.1,108.3,108.6,108.8,109.1,109.3,109.5,109.8,110.0,110.3,110.5,110.8,111.0,111.2,111.5,111.7,112.0,
         112.2,112.5,112.7,112.9,113.0,113.2,113.4,113.7,113.9,114.2,114.4,114.6,114.9,115.1,115.4,115.6,115.9,116.1,116.6,116.8,
         117.1,117.3,117.6,117.8,118.1,118.3,118.5,118.8,119.0,119.3,119.5,119.8,120.0,120.3,120.5,120.7,121.0,121.2,121.5,121.7,
         122.0,122.2,122.5,122.7,122.9,123.2,123.4,123.7,123.9,124.2,124.4,124.7,124.9,125.1,125.4,125.6,125.9,126.1,126.4,126.6,
         126.9,127.1,127.3,127.6,127.8,128.1,128.3,128.6,128.8,129.1,129.3,129.6,129.8,130.0,130.3,130.5,130.8,131.0,131.3,131.5,
         131.8,132.0,132. ......

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