Hi Sajjad,
To incorporate the generated code into another project, you will need most of the generated source and header files located directly within the codegen/lib folder. However, you will not necessarily need the other files or folders in this directory.
In the Qt project, you can invoke the generated FFT code by calling the "takeFFT" entry point located in the takeFFT.h header. An example demonstrating how to invoke this entry point should be available in the generated 'examples' folder. This will contain some code that demonstrates how to use the generated entry-point function.
The example will first call the takeFFT_initialize() function, then call the takeFFT() entry point function, and finally call the takeFFT_terminate() function. The initialize and terminate functions are needed to ensure global state that is used by the generated code is correctly initialized and destroyed. When incorporating the code into your project, the initialize and terminate functions should be called at the beginning and end of your program respectively.
For more information, see the deployment section of the MATLAB Coder documentation: https://www.mathworks.com/help/coder/deployment.html?s_tid=CRUX_lftnav
Best,
-Ezra
