Read .dat file - binary data

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Luca Finazzi 2017-4-24

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评论： Nikhil Sreekumar 2017-4-27

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Dear all,

I'm getting trouble reading a dat file containing binary datas. The .dat files look like this:

0000110001000001
0001100001100100
0010010001001111
0010111111100100
0011101100001000

The datas are 16 bit 2'complement signed fractionary (fract part is 15 bits). I'm not able to find a way to get a right interpretation of the data. Is there a way to to that?

Thanks a lot,

Luca.

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Luca Finazzi 2017-4-25

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I found a way to solve the issue. Probably it isn't the best way to do that, but I post the code, hope will be helpfull

function [out] = fix2dec(input, word_len, fract_len, sign);
      % convert a string rapresentation of datas into a vector of decimal values
      % input : string
      % word_len, fract_len : integer
      % sign : boolean (1 signed, 0 unsigned)
      %range controls
      if ( sign ~= 0 && sign ~= 1 )
          error('Sign out of range: 1 signed 0 unsigned');
      end
      M = zeros(ceil(length(input)/(word_len+2)),word_len+2);
      out = zeros(1,ceil(length(input)/(word_len+2)));
      for k = 1:1:ceil(length(input)/(word_len+2))-1
          for n = 1:1:word_len+2
                  M(k,n) = input(n+((word_len+2)*(k-1)));
                  if (n<word_len+1 && n>1)
                      out(k) = out(k)+(M(k,n)-'0')*2^(word_len-fract_len-n);
                  end
          end
          if(sign == 1 && M(k,1) == '1')
              out(k) = -2^(word_len-1-fract_len)+out(k);
          end
      end
end