Add initial PD controller trait

Cargo.toml

@@ -5,9 +5,8 @@ edition = "2021"
 
 [dependencies]
 defmt = { version = "0.3", optional = true }
+embedded-hal-async = "1.0.0"
 
 [features]
 default = ["defmt"]
-defmt = [
-    "dep:defmt"
-]
+defmt = ["dep:defmt"]

src/asynchronous/controller.rs

@@ -0,0 +1,11 @@
+use core::future::Future;
+
+use embedded_hal_async::delay::DelayNs;
+
+use crate::Error;
+
+pub trait PdController {
+    type BusError;
+
+    fn reset(&mut self, delay: &mut impl DelayNs) -> impl Future<Output = Result<(), Error<Self::BusError>>>;
+}

src/asynchronous/mod.rs

@@ -0,0 +1 @@
+pub mod controller;

src/lib.rs

@@ -1,5 +1,7 @@
 #![no_std]
 
+pub mod asynchronous;
+
 /// Port ID new type
 #[derive(Copy, Clone, Debug, PartialEq, Eq)]
 #[cfg_attr(feature = "defmt", derive(defmt::Format))]
@@ -51,6 +53,7 @@ pub enum PdError {
     InvalidMode,
     /// Data serialization error
     Serialize,
+    InProgress,
 }
 
 /// Top-level error type
@@ -73,4 +76,4 @@ impl<BE> Into<Error<BE>> for PdError {
     fn into(self) -> Error<BE> {
         Error::Pd(self)
     }
-}
+}