Packages
circuits_gpio
1.2.1
2.3.0
2.2.0
2.1.3
2.1.2
retired
2.1.1
retired
2.1.0
retired
2.0.2
retired
2.0.1
retired
2.0.0
retired
2.0.0-pre.6
retired
2.0.0-pre.5
retired
2.0.0-pre.4
retired
2.0.0-pre.3
retired
2.0.0-pre.2
retired
2.0.0-pre.1
retired
2.0.0-pre.0
retired
1.2.2
1.2.1
1.2.0
1.1.0
1.0.1
1.0.0
0.4.8
0.4.7
0.4.6
0.4.5
0.4.4
0.4.3
0.4.2
0.4.1
0.4.0
0.3.1
0.3.0
0.2.0
0.1.0
Use GPIOs in Elixir
Current section
Files
Jump to
Current section
Files
lib/gpio/gpio_nif.ex
# SPDX-FileCopyrightText: 2018 Frank Hunleth, Mark Sebald, Matt Ludwigs
#
# SPDX-License-Identifier: Apache-2.0
defmodule Circuits.GPIO.Nif do
@moduledoc false
defp load_nif_and_apply(fun, args) do
nif_binary = Application.app_dir(:circuits_gpio, "priv/gpio_nif")
# Optimistically load the NIF. Handle the possible race.
case :erlang.load_nif(to_charlist(nif_binary), 0) do
:ok -> apply(__MODULE__, fun, args)
{:error, {:reload, _}} -> apply(__MODULE__, fun, args)
error -> error
end
end
def open(pin_number, pin_direction, initial_value, pull_mode) do
load_nif_and_apply(:open, [pin_number, pin_direction, initial_value, pull_mode])
end
def close(_gpio) do
:erlang.nif_error(:nif_not_loaded)
end
def read(_gpio) do
:erlang.nif_error(:nif_not_loaded)
end
def write(_gpio, _value) do
:erlang.nif_error(:nif_not_loaded)
end
def set_interrupts(_gpio, _trigger, _suppress_glitches, _process) do
:erlang.nif_error(:nif_not_loaded)
end
def set_direction(_gpio, _pin_direction) do
:erlang.nif_error(:nif_not_loaded)
end
def set_pull_mode(_gpio, _pull_mode) do
:erlang.nif_error(:nif_not_loaded)
end
def pin(_gpio) do
:erlang.nif_error(:nif_not_loaded)
end
def info() do
load_nif_and_apply(:info, [])
end
end