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manewitz/unicorn_hat_hd_circuits_spi.ex

Last active July 25, 2023 22:04
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Elixir - Unicorn Hat HD via Circuits.SPI [WIP]
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unicorn_hat_hd_circuits_spi.ex
{:ok, spi_ref} = Circuits.SPI.open("spidev0.0", speed_hz: 9_000_000)
off = <<0x72>> <> (<<0::8, 0::8, 0::8>> |> :binary.copy(16 * 16))
red = <<0x72>> <> (<<255::8, 0::8, 0::8>> |> :binary.copy(16 * 16))
green = <<0x72>> <> (<<0::8, 255::8, 0::8>> |> :binary.copy(16 * 16))
blue = <<0x72>> <> (<<0::8, 0::8, 255::8>> |> :binary.copy(16 * 16))
white = <<0x72>> <> (<<255::8, 255::8, 255::8>> |> :binary.copy(16 * 16))
Circuits.SPI.transfer(spi_ref, red)
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