Why do I get an error about 'hdlentitysignalsinit' when using FDATool with Filter Design HDL Coder 2.9.3 (R2013a)?

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MathWorks Support Team 2013-7-19

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https://ww2.mathworks.cn/matlabcentral/answers/94161-why-do-i-get-an-error-about-hdlentitysignalsinit-when-using-fdatool-with-filter-design-hdl-coder-2

I am trying to design a filter for HDL code generation by using the FDATool GUI in Filter Design HDL Coder 2.9.3 (R2013a). However, when I try to generate HDL code, I observe the following error:

Unexpected HDL Coder call to hdlentitysignalsinit.

I find that the steps below consistently reproduce this error:

1. I bring up FDATOOL by using the following command at the MATLAB prompt:

>> fdatool

2. I click on Targets->Generate HDL.

3. I click "Generate", and the error appears.

What does this error mean, and how do I resolve this issue?

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Answer 1

MathWorks Support Team 2013-7-19

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https://ww2.mathworks.cn/matlabcentral/answers/94161-why-do-i-get-an-error-about-hdlentitysignalsinit-when-using-fdatool-with-filter-design-hdl-coder-2#answer_103513

This error typically indicates that a previous use of HDL Coder resulted in a failed operation, leaving the state of the code generator mode in a non-default setting. In order to resolve this issue, type the following at the MATLAB prompt:

>> hdlcodegenmode('reset')