Matlab type mismatch in Embedded Matlab Functions
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I want to do a CRC-32 for a vector in an Embedded Matlab Function. Before it I've tried it in the Matlab command line and it works. The commands in Matlab look like this:
a = [1;2;3;4;5;6] % a vector
b = dec2bin(a, 8) % converted to binary value
c = b’
d = reshape(c, 48, 1) % converted to column vectors
e = double(d) % type conversion
f = e – 48 % from ASCII to real values
hGen = comm.CRCGenerator([32 26 23 16 12 11 10 8 7 5 4 2 1 0], 'CheckSumsPerFrame', 1); % polynomial for CRC-32
codeword = step(hGen, f) % CRC-32 generation
but even the first step fails in the Embedded Matlab Function:
"y = dec2bin(a, 8)".
The error: Function output 'y' cannot be of MATLAB type.
What is Matlab type? Can anyone help me to solve this problem?
Fred Smith on 26 Nov 2012
Going through a string to get the bitstream is questionable. This is the best alternative I could come up with:
function y = int2bit(u)
% For code generation, input u must be of an integer class.
y = zeros(1,numel(u) * 8);
for i = 1:numel(u)
y(i + (0:7)) = bitget(u(i),1:8);
I think this is very close in spirit to what you are trying to do.