FPP configuration changes not taking effect

[YungCorn]

I'm having some trouble trying to apply configuration changes to my fprime project. I want to resize the com buffer to allow for file packets to be 2048 bytes. In the FpConfig.h file I have made the following change:

#define FW_COM_BUFFER_MAX_SIZE 2036   // File packets will be 2048 bytes

This change does appear to be working as expected. However, in order to build with this change, I also need to modify TmFrameFixedSize in ComCfg.fpp and MAX_SERIALIZABLE_REGISTER_SIZE in FpySequencerCfg.fpp to accommodate the new com buffer size. Changing the values in these files doesn't appear to have any effects. The constants remain set to the defaults no matter what I do.

Any ideas on what's going on here? Why would .h/.hpp changes take effect but not .fpp changes? I am using v4.0.0 of fprime so perhaps this has been addressed in newer versions?

[thomas-bc]

Did you try purging your build cache and re-generating?

[YungCorn]

Yes, doing:

fprime-util purge
fprime-util generate
fprime-util build

will fail to build because TmFrameFixedSize and MAX_SERIALIZABLE_REGISTER_SIZE are still pulling from the defaults instead of my config directory.

[thomas-bc]

Can you share your code? Are other config values being pulled correctly? This could happen if your Cmakefiles aren't registering the config as expected

[YungCorn]

It would be tricky to share code directly. But I could be doing something wrong with registering the config. I've added this line to my settings.ini file:

config_directory: ./<PATH_TO_CONFIG_DIRECTORY>

Are there other files that need to be changed to register config values? Or is there a document/reference I could look at?

[YungCorn]

After discussing in office hours, it turns out I needed to add ComCfg.fpp and FpySequencerCfg.fpp to the override list in the config folder's CMakeLists.txt file. (FpConfig.h was already on the list which is why changes to it were being pulled in.)