I hooked up my mouse to the Discovery board. I cut the wires from the Nordic chip to the PAW3205 chip. I soldered my wires to PAW3205 and connected them to SPI1 on the Discovery board.
So here is my idea. Which is just a rough idea. I would like to develop a device, which can interpret Serato timecode vinyl and can use Algoriddim Djay with it.
For that functionality, I will clone my Reloop Beatpad USB interface, and emulate it to Djay. Unfortunately Djay cannot be used with any MIDI controllers and soundcards. It just works with the supported ones, so I need to fake it.