Add function to reset a relay board

README.md

@@ -17,7 +17,7 @@ Add `:arb` to your list of dependencies:
 ```elixir
 def deps do
   [
-    {:arb, "~> 0.1.0"}
+    {:arb, "~> 0.2.0"}
   ]
 end
 ```

lib/arb.ex

@@ -43,4 +43,18 @@ defmodule Arb do
   def get_active(port \\ nil)
   def get_active(port) when is_integer(port) or is_nil(port), do: Native.get_active(port)
   def get_active(_port), do: {:error, :invalid_args}
+
+  @doc """
+  Resets the relay board.
+
+  ## Examples
+
+      iex> Arb.reset()
+      :ok
+
+  """
+  @spec reset(integer) :: {:ok, list(integer)} | {:error, atom}
+  def reset(port \\ nil)
+  def reset(port) when is_integer(port) or is_nil(port), do: Native.reset(port)
+  def reset(_port), do: {:error, :invalid_args}
 end

lib/arb/native.ex

@@ -11,5 +11,7 @@ defmodule Arb.Native do
 
   def get_active(_port), do: error()
 
+  def reset(_port), do: error()
+
   defp error, do: :erlang.nif_error(:nif_not_loaded)
 end

mix.exs

@@ -4,7 +4,7 @@ defmodule Arb.MixProject do
   def project do
     [
       app: :arb,
-      version: "0.1.0",
+      version: "0.2.0",
       elixir: "~> 1.6",
       start_permanent: Mix.env() == :prod,
       compilers: [:rustler] ++ Mix.compilers(),

native/arb/.gitignore

@@ -0,0 +1,2 @@
+/target/
+**/*.rs.bk

native/arb/Cargo.toml

@@ -12,4 +12,4 @@ crate-type = ["dylib"]
 rustler = "0.16.0"
 rustler_codegen = "0.16.0"
 lazy_static = "0.2"
-arb = { git = "https://github.com/adriankumpf/abacom-relay-board", tag = 'v0.1.0' }
+arb = { git = "https://github.com/adriankumpf/abacom-relay-board", tag = 'v0.2.0' }

native/arb/src/lib.rs

@@ -91,11 +91,21 @@ fn get_active<'a>(env: NifEnv<'a>, args: &[NifTerm<'a>]) -> NifResult<NifTerm<'a
     Ok((atoms::ok(), active_relays).encode(env))
 }
 
+fn reset<'a>(env: NifEnv<'a>, args: &[NifTerm<'a>]) -> NifResult<NifTerm<'a>> {
+    let port: Option<u8> = args[0].decode()?;
+
+    match arb::reset(port) {
+        Err(err) => return Ok(arb_error_to_term(env, err)),
+        Ok(()) => Ok(atoms::ok().encode(env)),
+    }
+}
+
 rustler_export_nifs! {
     "Elixir.Arb.Native",
     [
         ("activate", 2, activate),
-        ("get_active", 1, get_active)
+        ("get_active", 1, get_active),
+        ("reset", 1, reset)
     ],
     None
 }