how can i demodulate an FM signal without using any function?

I want to write matlab code to demodulate FM signal without using any built in or other function. ie without using fmdemod or atan or hilbert. If i get such a code I can convert it into the corresponding VHDL code using HDL coder.

[shubham kumar]

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Answer 1

[Kiran Kintali]

You can refer to product documentation about MATLAB coding style suitable for HDL Code Generation.

web(fullfile(docroot, 'hdlcoder/hdl-code-generation-from-matlab.html'))

%Refer to product examples for some sample coding styles.
mlhdlc_demo_setup('heq')

% All MATLAB to HDL code samples are located here
cd matlab\toolbox\hdlcoder\hdlcoderdemos\matlabhdlcoderdemos