This first release is mainly for testing purposes.
What does it do
Connect the USB USER port of your STM32F3Discovery to your computer or tablet (Windows/macOS/Linux/iOS/etc.). It should be recognized as a USB class-compliant MIDI controller, named "OpenMidiSurface". No additional driver is needed. On you device, you can open a MIDI synth of your choice, and connect its MIDI input to the MIDI output of OpenMidiSurface. Each time you press the user button on the STM32F3Discovery board, a different note of blues scale will be played, and a different LED will be lit up. Enjoy!
How to flash
Connect the USB ST-LINK port of your STM32F3Discovery to your computer (Windows/macOS/Linux). Then, you can flash .hex file. To do this, you can use a tool like stlink-gui from the Open source STM32 MCU programming toolset.