Add self-creation for controller

emgauwa-controller/src/driver.rs

@@ -0,0 +1,18 @@
+use serde::{Deserialize, Deserializer};
+
+#[derive(Debug, Clone, Copy)]
+pub enum Driver {
+    Gpio,
+    Piface,
+}
+
+impl<'de> Deserialize<'de> for Driver {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> where D: Deserializer<'de> {
+        match String::deserialize(deserializer)?.as_str() {
+            "gpio" => Ok(Driver::Gpio),
+            "piface" => Ok(Driver::Piface),
+            _ => Err(serde::de::Error::custom("invalid driver")),
+        }
+
+    }
+}