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This example implements a USB MIDI device to demonstrate the use of the USB device stack. It implements the device configuration found in Appendix B of the Universal Serial Bus Device Class Definition for MIDI Devices.

The board will continuously send note on/note off messages.

The board will also react to identity request (or any other data sent to the board) by transmitting an identity message in reply.


To list midi devices, which should include this demo device

$ amidi -l
Dir Device    Name
IO  hw:2,0,0  MIDI demo MIDI 1

To record events

$ amidi -d -p hw:2,0,0

90 3C 40   -- key down
80 3C 40   -- key up
90 3C 40
80 3C 40^C
12 bytes read

To query the system identity, note this dump matches sysex_identity[] in the source.

$ amidi -d -p hw:2,0,0 -s Sysexdump.syx

F0 7E 00 7D 66 66 51 19 00 00 01 00 F7
13 bytes read