I was also facing the issue while generating code in C++, and after going through the bug reports and documentation, I found some insights that might help you with your C++ code generation using Embedded Coder in MATLAB 2024a.
- Configuration Parameters: First, make sure the "TargetLang" parameter is set to 'C++' in your Model Configuration Parameters. This setting is essential for generating C++ code instead of C.
- Array Container Type: If you’re using "std::array" for the "ArrayContainerType", be aware that this might cause numerical differences between software-in-the-loop (SIL) or processor-in-the-loop (PIL) simulations and normal mode simulations. This happens especially if you're logging non-scalar signals, as the generated code uses "std::array" for these signals, which might behave differently. You may refer to the below bug reports link to know more about it: https://www.mathworks.com/support/bugreports/details/3419440
- External Mode Considerations: Be cautious if you enable the External mode configuration parameter, as it may lead to uncompilable C++ code. Starting in R2024b, there’s a change where Embedded Coder uses member methods instead of macros to access real-time model (RTM) data structures, so you might need to update your code accordingly. You can read more about the same in the R2024b release notes: https://www.mathworks.com/help/ecoder/release-notes.html?startrelease=R2024b&endrelease=R2024b&rntext=embedded+coder&groupby=release&sortby=descending&searchHighlight=embedded+coder#:~:text=%C2%A0Replace%20real%2Dtime%20model%20macros%20with%20member%20methods
- Custom Storage Classes: It might be helpful to define custom storage classes in the Embedded Coder Dictionary that are specifically designed for C++ code generation. This can give you more control over how variables are managed and represented in the generated code.
I hope this helps!
