OK to use your code?

[Bob-the-Kuhn]

Many thanks for your CDC + MSC USB Composite Device on STM32 HAL article. This is the only semi-detailed composite USB article I've found involving the STM32 family.

I've done enough stumbling around the USB world and the STM32 library to understand the top level. I definitely had no clue as to how to create a composite device.

IF I can get my mind around your code I'll try to port it to the Marlin 3D printer code base. It might even end up in the official ST library because that is what we've been recommending when compiling Marlin with the Arduino IDE.

Is it OK if I do that?

I didn't see any copyright, license or author info in your modified files. What would you want me to include?