This is the source code distribution for the USBmidi2 USB MIDI interface devices.
http://rpc.gehennom.org/2015/06/second-iteration-usbmidi2/
Due to consistent lack of time, the code is quite messy.
ProcessorExpert generates code that uses a lot of space. To reduce the size, the patch files called "size_patch.diff" should be applied every time after generating the PE code.