Hy,

I'm trying to convert a float number to a uint16_t[2], according the IEEE 754 format.

For example, I manage to do the contrary :

Qt Code: 
  1. double uint16t2double(uint16_t* buff)
  2. {
  3.     uint32_t test32 = 0;
  4.     test32 = buff[0];
  5.     int i;
  6.     double resultat;
  7.  
  8.     test32 = test32 << 16;
  9.  
  10.     test32 = test32 + buff[1];
  11.  
  12.     char sign;
  13.     signe = test32 >> 31;
  14.  
  15.     unsigned char expo;
  16.     expo = (test32 & 0x7F800000) >> 23;
  17.     expo -= 127;
  18.  
  19.     uint32_t mantissa = (test32 & 0x7FFFFF);
  20.     float m = 1;
  21.     for(i=1; i<=23; i++) {
  22.         if((mantissa & 0x400000) != 0) {
  23.             m += pow(2, -i);
  24.         }
  25.         mantissa = mantissa << 1;
  26.     }
  27.  
  28.     result = pow((double)2,(double)expo);
  29.     if(sign)
  30.         result = -1*result * m;
  31.     else
  32.         result = result * m;
  33.  
  34.     return result;
  35. }
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Can anyone help me ?

PS: I'm new on forum, please excuse me if my message is not in the proper section and my explanations too succinct.