39 lines
1.1 KiB
Python
39 lines
1.1 KiB
Python
# SPDX-FileCopyrightText: 2018 John Park for Adafruit Industries
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#
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# SPDX-License-Identifier: MIT
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# Simple example of sending MIDI via UART to classic DIN-5 (not USB) synth
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import adafruit_trellism4
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from rainbowio import colorwheel
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import board
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import busio
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midiuart = busio.UART(board.SDA, board.SCL, baudrate=31250, timeout=0.001)
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print("MIDI UART EXAMPLE")
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trellis = adafruit_trellism4.TrellisM4Express()
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for x in range(trellis.pixels.width):
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for y in range(trellis.pixels.height):
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pixel_index = (((y * 8) + x) * 256 // 2)
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trellis.pixels[x, y] = colorwheel(pixel_index & 255)
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current_press = set()
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while True:
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pressed = set(trellis.pressed_keys)
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for press in pressed - current_press:
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x, y = press
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print("Pressed:", press)
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noteval = 36 + x + (y * 8)
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midiuart.write(bytes([0x90, noteval, 100]))
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for release in current_press - pressed:
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x, y = release
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print("Released:", release)
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noteval = 36 + x + (y * 8)
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midiuart.write(bytes([0x90, noteval, 0])) # note off
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current_press = pressed
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