Merge pull request #14 from timokroeger/uarte-power-optimization

UARTE power optimization and improvements

embassy/src/util/signal.rs

@@ -63,12 +63,7 @@ impl<T: Send> Signal<T> {
         futures::future::poll_fn(move |cx| self.poll_wait(cx))
     }
 
-    /// Blocks until the signal has been received.
-    ///
-    /// Returns immediately when [`poll_wait()`] has not been called before.
-    pub fn blocking_wait(&self) {
-        while cortex_m::interrupt::free(|_| {
-            matches!(unsafe { &*self.state.get() }, State::Waiting(_))
-        }) {}
+    pub fn signaled(&self) -> bool {
+        cortex_m::interrupt::free(|_| matches!(unsafe { &*self.state.get() }, State::Signaled(_)))
     }
 }