Support for this Feather is experimental, and you need to use CircuitPython 6.0.0-beta.3 or newer! If you get an ImportError, make sure you're using the right version.

To hook an LED matrix to the Feather STM32F405, make the connections on the left. Remember that for a 16-line matrix, connect 4 GND wires and address wires A, B, and C. For a 32-line matrix, connect 3 GND wires and address wires A, B, C, and D.

Use the following block of code to initialize a 64x32 matrix. Remember to connect all 4 address pins: A, B, C, and D.

Don't forget you have to provide a separate 5V @ 2 ~ 10Amp power supply to the panels thick power cables.
Download: file
displayio.release_displays()
matrix = rgbmatrix.RGBMatrix(
    width=64, bit_depth=4,
    rgb_pins=[board.D13, board.D12, board.D11, board.A4, board.A5, board.D6],
    addr_pins=[board.A0, board.A1, board.A2, board.A3],
    clock_pin=board.D5, latch_pin=board.D9, output_enable_pin=board.D10)
display = framebufferio.FramebufferDisplay(matrix)

Use the following block of code to initialize a 32x16 matrix. Remember to connect just 3 address pins: A, B, and C. Hook a fourth GND wire instead of A3.

Download: file
displayio.release_displays()
matrix = rgbmatrix.RGBMatrix(
    width=32, bit_depth=4,
    rgb_pins=[board.D13, board.D12, board.D11, board.A4, board.A5, board.D6],
    addr_pins=[board.A0, board.A1, board.A2],
    clock_pin=board.D5, latch_pin=board.D9, output_enable_pin=board.D10)
display = framebufferio.FramebufferDisplay(matrix)

This guide was first published on Apr 20, 2020. It was last updated on 2021-03-13 16:23:12 -0500.

This page (Feather STM32F405) was last updated on Apr 13, 2021.

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