about hdl coder in simulink

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Prashanth Nayak 2016-4-21

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编辑： Prashanth Nayak 2016-4-23

Hii,

Can you please tell me what are the settings to be done for 'sin', 'cos' blocks while using for HDL Conversion..? I am getting error as "HDL code generation does not support double or single data type for the block Trigonometric Function". I am not able to follow this. Please help me in fixing this problem.

and also while using square root its giving error as "Sqrt function with non-fixedpoint output datatype is not supported." and "Sqrt function with signed input is not supported."

please help me with this.

Thank you

Regards, Prashanth

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Answer 1

Walter Roberson 2016-4-21

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It is suggested that you use CORDIC; see https://www.mathworks.com/examples/simulink-hdl-coder/mw/hdlcoder_product-hdlcordic_eml-cordic-algorithm-using-the-matlab-reg-function-block

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Walter Roberson 2016-4-21

Yes, it requires so much code.

In some cases, there is information around that allows the sin or cos to be calculated more directly by geometric means such as "opposite divided by hypotenuse". cos in particular has in interpretation from dot products.

Prashanth Nayak 2016-4-23