refactor: distance sensor

CHANGELOG.md

@@ -106,7 +106,7 @@ Before releasing:
 - Repurposed the `pros` crate as a metapackage without any code of its own. (**Breaking Change**) (#86)
 - Split the pros-rs into several small subcrates. (**Breaking Change**) (#86)
   - `pros-async` with the async executor and robot trait.
-  - `pros-devices` for device bindings.
+  - `vex-devices` for device bindings.
   - `pros-sync` for the sync robot trait.
   - `pros-core` with basic abstractions over `pros-sys` needed to compile a program to the brain.
   - `pros-math` with commonly used controllers and other mathematical models.

packages/pros-core/src/error.rs

@@ -86,27 +86,20 @@ macro_rules! bail_on {
 }
 use snafu::Snafu;
 
+#[derive(Debug, Snafu)]
+/// Generic erros that can take place when using ports on the V5 Brain.
+pub enum PortError {
+    /// No device is plugged into the port.
+    Disconnected,
+
+    /// The incorrect device type is plugged into the port.
+    IncorrectDevice,
+}
+
 /// A trait for converting an errno value into an error type.
 pub trait FromErrno {
     /// Consume the current `errno` and, if it contains a known error, returns Self.
     fn from_errno(num: i32) -> Option<Self>
     where
         Self: Sized;
 }
-
-#[derive(Debug, Snafu)]
-/// Generic erros that can take place when using ports on the V5 Brain.
-pub enum PortError {
-    /// The specified port is outside of the allowed range!
-    PortOutOfRange,
-    /// The specified port couldn't be configured as the specified type.
-    PortCannotBeConfigured,
-    /// The specified port is already being used or is mismatched.
-    AlreadyInUse,
-}
-
-map_errno!(PortError {
-    ENXIO => Self::PortOutOfRange,
-    ENODEV => Self::PortCannotBeConfigured,
-    EADDRINUSE => Self::AlreadyInUse,
-});