1  # SPDX-FileCopyrightText: 2022 Liz Clark for Adafruit Industries
 2  # SPDX-License-Identifier: MIT
 3  
 4  import board
 5  import busio
 6  import usb_midi
 7  import adafruit_midi
 8  # pylint: disable=unused-import
 9  from adafruit_midi.control_change import ControlChange
10  from adafruit_midi.pitch_bend import PitchBend
11  from adafruit_midi.note_off import NoteOff
12  from adafruit_midi.note_on import NoteOn
13  from adafruit_midi.program_change import ProgramChange
14  
15  #  uart setup
16  uart = busio.UART(board.TX, board.RX, baudrate=31250)
17  #  midi channel setup
18  midi_in_channel = 1
19  midi_out_channel = 1
20  #  midi setup
21  #  UART is setup as the input
22  #  USB is setup as the output
23  midi = adafruit_midi.MIDI(
24      midi_in=usb_midi.ports[0],
25      midi_out=uart,
26      in_channel=(midi_in_channel - 1),
27      out_channel=(midi_out_channel - 1),
28      debug=False,
29  )
30  
31  while True:
32      #  receive MIDI message over USB
33      msg = midi.receive()
34      #  if a message is received...
35      if msg is not None:
36          #  send that message over UART
37          midi.send(msg)
38          #  print message to REPL for debugging
39          print(msg)