add enum debug macro

Cargo.lock

@@ -614,6 +614,15 @@ dependencies = [
  "stm32-data-serde",
 ]
 
+[[package]]
+name = "stm32-data-macros"
+version = "0.1.0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+]
+
 [[package]]
 name = "stm32-data-serde"
 version = "0.1.0"
@@ -635,6 +644,7 @@ dependencies = [
  "regex",
  "serde",
  "serde_json",
+ "stm32-data-macros",
 ]
 
 [[package]]

Cargo.toml

@@ -3,6 +3,7 @@ members = [
     "stm32-data-gen",
     "stm32-data-serde",
     "stm32-metapac-gen",
+    "stm32-data-macros",
 ]
 exclude = [
     "build"

stm32-data-macros/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "stm32-data-macros"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+proc-macro = true
+
+[dependencies]
+proc-macro2 = "1.0.36"
+quote = "1.0.15"
+syn = "1.0"

stm32-data-macros/src/lib.rs

@@ -0,0 +1,44 @@
+use proc_macro2::TokenStream;
+use quote::quote;
+use syn;
+use syn::Data;
+
+#[proc_macro_derive(EnumDebug)]
+pub fn enum_derive(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
+    let ast = syn::parse(input).unwrap();
+
+    impl_enum_derive(&ast).into()
+}
+
+fn impl_enum_derive(ast: &syn::DeriveInput) -> TokenStream {
+    let name = &ast.ident;
+    let enumm = match &ast.data {
+        Data::Enum(e) => e,
+        _ => unreachable!(),
+    };
+
+    let match_variants: TokenStream = enumm
+        .variants
+        .iter()
+        .map(|v| {
+            let variant_name = &v.ident;
+            let variant_debug = format!("{}::{}", name, variant_name);
+
+            quote! {
+                #name::#variant_name => #variant_debug,
+            }
+        })
+        .collect();
+
+    quote! {
+        #[automatically_derived]
+        impl ::core::fmt::Debug for #name {
+            fn fmt(self: &Self, f: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
+                ::core::fmt::Formatter::write_str(f, match self {
+                    #match_variants
+                })
+            }
+        }
+    }
+    .into()
+}

stm32-metapac-gen/Cargo.toml

@@ -11,4 +11,4 @@ chiptool = { git = "https://github.com/embassy-rs/chiptool", rev = "0621765f915c
 serde = { version = "1.0.157", features = [ "derive" ] }
 serde_json = "1.0.94"
 proc-macro2 = "1.0.52"
-
+stm32-data-macros = { version = "0.1.0", path = "../stm32-data-macros" }