I have designed a proto board, let's name it a "Bluepill MIDI shield", to facilitate the use of that cheap 2$ small factor uC board as a powerfull USB MIDI 3 IN / 3 OUT interface. Much more powerful than an Uno or a Micro...
Thanks to the STM32DUINO project, (Arduino port for STM32 uC familiy), the firmware allows powerful midi routing, thru , merge, etc..., custom USB PID/VID, etc...
That is based on the USB MidiKlik project developed for the Arduino Uno originally.
Thanks for sharing! It looks like a very cool project.
I have a suggestion:
The Arduino IDE requires that a sketch be located in a folder of the same name. Although the name of the repository does match the sketch name, when GitHub's popular Clone or download > Download ZIP feature is used to download the contents of a repository the branch/tag/commit name is appended to the folder name, causing a mismatch.
When opening a file that does not meet this sketch/folder name matching requirement the Arduino IDE presents a dialog:
The file "UsbMidiKliK4x4.ino" needs to be inside a sketch folder named "UsbMidiKliK4x4".
Create this folder, move the file, and continue?
After clicking "OK" the Arduino IDE currently moves only the file UsbMidiKliK4x4.ino to the new folder, leaving behind the other source files. This causes compilation of the sketch to fail due to the missing other files of the sketch.
The solution to this issue is to move the sketch to an appropriately named subfolder of the repository. If you're receptive to this change, I'd be happy to submit a pull request.
