added display

src/enums.rs

@@ -1,3 +1,5 @@
+use core::fmt;
+
 use num_enum::{IntoPrimitive, TryFromPrimitive};
 
 /// Message Identifier used in the communication protocol. This is specified by Viessmann
@@ -11,6 +13,17 @@ pub enum MessageIdentifier {
     CommError = 0x03,
 }
 
+impl fmt::Display for MessageIdentifier {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::Request => write!(f, "Request"),
+            Self::Response => write!(f, "Response"),
+            Self::Unacked => write!(f, "Unacked"),
+            Self::CommError => write!(f, "CommError"),
+        }
+    }
+}
+
 /// Function Code used in the communication protocol.
 /// 
 /// This is specified by Viessmann and Read and Write are usually used for simpler values, 
@@ -23,6 +36,16 @@ pub enum FunctionCode {
     RemoteProcedureCall = 0x07,
 }
 
+impl std::fmt::Display for FunctionCode {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::VirtualREAD => write!(f, "VirtualREAD"),
+            Self::VirtualWRITE => write!(f, "VirtualWRITE"),
+            Self::RemoteProcedureCall => write!(f, "RemoteProcedureCall"),
+        }
+    }
+}
+
 /// Response code used in the communication protocol. This is specified by Viessmann
 #[repr(u8)]
 #[derive(Debug, TryFromPrimitive)]