61 lines
1.5 KiB
Elixir
61 lines
1.5 KiB
Elixir
defmodule Farmbot.Firmware.UartHandler.AutoDetector do
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@moduledoc """
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Init module for configuring a UART handler. Here's what it does:
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* Enumerates Serial devices
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* Scrubs devices that should be ignored.
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* If there is *ONE* device:
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* Configures Farmbot.Behaviour.FirmwareHandler -> UartHandler
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* Configures the device to be used.
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* If there are zero or more than one device:
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* Configures Farmbot.Behaviour.FirmwareHandler -> StubHandler
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"""
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alias Nerves.UART
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alias Farmbot.Firmware.{UartHandler, StubHandler, Utils}
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import Utils
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use Farmbot.Logger
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#TODO(Connor) - Maybe make this configurable?
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case Farmbot.Project.target() do
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:rpi3 ->
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@ignore_devs ["ttyAMA0", "ttyS0", "ttyS3"]
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:rpi ->
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@ignore_devs ["ttyS0", "ttyS3"]
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:rpi0 ->
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@ignore_devs ["ttyS0", "ttyS3"]
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:host ->
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@ignore_devs ["ttyS0"]
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end
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@doc "Autodetect relevent UART Devs."
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def auto_detect do
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UART.enumerate() |> Map.keys() |> Kernel.--(@ignore_devs)
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end
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@doc false
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def start_link(_, _) do
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GenServer.start_link(__MODULE__, [])
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end
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def init([]) do
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update_env()
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:ignore
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end
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def update_env do
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case auto_detect() do
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[dev] ->
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dev = "/dev/#{dev}"
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Logger.success 3, "detected target UART: #{dev}"
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replace_firmware_handler(UartHandler)
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Application.put_env(:farmbot, :uart_handler, tty: dev)
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dev
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_ ->
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Logger.error 1, "Could not detect a UART device."
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replace_firmware_handler(StubHandler)
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:error
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end
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end
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end
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