Merge #691

691: Basic cfg support, kind of, for Monotonics r=korken89 a=AfoHT

- Enable at least masking out a Monotonic
- Add example cfg-ing a Monotonic, showing limitations imposed by rtic-syntax
- Update changelog

The use case detailed in linked issue seems to be covered: Fixes #664 

Co-authored-by: Henrik Tjäder <henrik@tjaders.com>

1 files changed, 11 insertions, 4 deletions

diff --git a/macros/src/codegen/post_init.rs b/macros/src/codegen/post_init.rs
index 9531254c..460b4e21 100644
--- a/macros/src/codegen/post_init.rs
+++ b/macros/src/codegen/post_init.rs
@@ -43,21 +43,28 @@ pub fn codegen(app: &App, analysis: &Analysis) -> Vec<TokenStream2> {
         }
     }
 
-    for (i, (monotonic, _)) in app.monotonics.iter().enumerate() {
+    for (i, (monotonic_ident, monotonic)) in app.monotonics.iter().enumerate() {
         // For future use
         // let doc = format!(" RTIC internal: {}:{}", file!(), line!());
         // stmts.push(quote!(#[doc = #doc]));
+        let cfgs = &monotonic.cfgs;
 
         #[allow(clippy::cast_possible_truncation)]
         let idx = Index {
             index: i as u32,
             span: Span::call_site(),
         };
-        stmts.push(quote!(monotonics.#idx.reset();));
+        stmts.push(quote!(
+            #(#cfgs)*
+            monotonics.#idx.reset();
+        ));
 
         // Store the monotonic
-        let name = util::monotonic_ident(&monotonic.to_string());
-        stmts.push(quote!(#name.get_mut().write(Some(monotonics.#idx));));
+        let name = util::monotonic_ident(&monotonic_ident.to_string());
+        stmts.push(quote!(
+            #(#cfgs)*
+            #name.get_mut().write(Some(monotonics.#idx));
+        ));
     }
 
     // Enable the interrupts -- this completes the `init`-ialization phase