I've run through a series of issues (power and iterating).
1- Placing the 5V_BUS jumper while still using the default 5V_STLK power causes some kind of power problem with my devices. I got it to work with a tiny USB-C card reader, but event my USB UART will cause the board to go red.
2- If I choose the example in STM32CubeMX and don't modify it, then generate a STM32CubeIDE project, I can load, build, and run with the card reader. I basically just detect it without adding support for storage. However, if I add other host classes, I run into problems.
* Adding Prolific and CDC_ACM means I exceed the 2 default classes. When I bump up UX_MAX_CLASS_DRIVER in the two header files, it still fails. Turns out the bulid doesn't correctly detect this change, and you need to do a clean build to fix it.
* Even after working, if I go back into the .ioc file with STM32CubeMX, and I enable other peripherals, USB will often stop working because the correct startup code is no longer generated.
* Tracking this down is problematic as for some reason, when I regenerated (I don't know if this is due to regenerating in STM32CubeIDE instead of exititing and regenerating from STM32CubeMX), but my diff shows that that the entire set of threadx, usbx, etc... sources are replaced. Even though it looks very similar. I believe the line endings are modified so it looks as if the files are basically new to my source control.
