lib/i2c/nil_backend.ex
defmodule Circuits.I2C.NilBackend do
@moduledoc """
Circuits.I2C backend when nothing else is available
"""
@behaviour Circuits.I2C.Backend
alias Circuits.I2C.Backend
@doc """
Return the I2C bus names on this system
No supported options
"""
@impl Backend
def bus_names(_options), do: []
@doc """
Open an I2C bus
No supported options.
"""
@impl Backend
def open(_bus_name, _options) do
{:error, :unimplemented}
end
@doc """
Return information about this backend
"""
@impl Backend
def info() do
%{name: __MODULE__}
end
end