using a dpigen with a mexfile inside it

hi

i am trying to generate a dpi-c with the matlab dpigen.

inside my code i have a matlab interface that he came from vivado model c. for simulation the ip code of an fft.

when i am trying to create the dpi, i am getting the following error:

Function call resolved to MEX file 'C:\CMODEL_FFT\xfft_v9_1_bitacc_mex.mexw64'. Only MATLAB files are

supported for code generation. Consider using coder.extrinsic to declare MEX function as extrinsic.

how can i create the dpi with this mex file inside the matlab code?

or how can i over come this error?

Answer 1

[praguna manvi]

Hi @nadav,

I see that you are looking to include external C/C++ function calls compiled as a MEX file for standalone code generation using "dpigen". To include these calls in code generation, you can consider using "coder.ceval", which calls the C/C++ function specified in "functionName" from the generated code. For more information, refer to:

https://www.mathworks.com/help/simulink/slref/coder.ceval.html

To understand more about when code generation is unsupported with "coder.extrinsic", refer to this useful discussion thread:

https://www.mathworks.com/matlabcentral/answers/388423-coder-extrinsic-applycform-not-support-for-code-generation-how-to-use-instead-of-applycform

Hope this helps!

[nadav]

hi @praguna manvi

thank you for your help.

when i try to use the coder.ceval, the ouput of the c file is a struct that i dont know how to approach the field inside.

meaning out.overflow for example does not work with the dpigen?

i know the fields of the struct, but i can't access them after calling coder.ceval.

can you please help and tell me if you know how can i get the field in the struct?