pt100.h

ＡＶＲ ＩＣＣ基于ＡＶＲ单片机的ＬＥＤ显示程序！

#define R  220              //   4   5   6   7
unit flash RPt100[20]={0,0,0,0,10000,0,11361,35,11940,50,13850,100,17216,190,21202,300,28090,500,31513,700};

unit PT100(ulong dat)
{
uchar ii=0;
unit Rx;
Rx=(((1024-dat)*22000)/dat);
while(RPt100[2*ii]<=Rx)
 {
  ii++;
 }
 ii<<=1;
 ii-=2;
return (((RPt100[ii+3]-RPt100[ii+1])*((Rx-RPt100[ii])/10))/((RPt100[ii+2]-RPt100[ii])/10)+RPt100[ii+1]) ;
}