add avr support

embassy-executor-macros/src/lib.rs

@@ -62,6 +62,13 @@ pub fn task(args: TokenStream, item: TokenStream) -> TokenStream {
     task::run(&args.meta, f).unwrap_or_else(|x| x).into()
 }
 
+#[proc_macro_attribute]
+pub fn main_avr(args: TokenStream, item: TokenStream) -> TokenStream {
+    let args = syn::parse_macro_input!(args as Args);
+    let f = syn::parse_macro_input!(item as syn::ItemFn);
+    main::run(&args.meta, f, main::avr()).unwrap_or_else(|x| x).into()
+}
+
 /// Creates a new `executor` instance and declares an application entry point for Cortex-M spawning the corresponding function body as an async task.
 ///
 /// The following restrictions apply:

embassy-executor-macros/src/macros/main.rs

@@ -12,6 +12,20 @@ struct Args {
     entry: Option<String>,
 }
 
+pub fn avr() -> TokenStream {
+    quote! {
+        #[avr_device::entry]
+        fn main() -> ! {
+            let mut executor = ::embassy_executor::Executor::new();
+            let executor = unsafe { __make_static(&mut executor) };
+
+            executor.run(|spawner| {
+                spawner.must_spawn(__embassy_main(spawner));
+            })
+        }
+    }
+}
+
 pub fn riscv(args: &[NestedMeta]) -> TokenStream {
     let maybe_entry = match Args::from_list(args) {
         Ok(args) => args.entry,