Merge #199

199: serial: remind users to NVIC::unmask interrupts r=therealprof a=birkenfeld

In ref to #198

This is a copy of the hint for the Timer.

Co-authored-by: Georg Brandl <[email protected]>

Author: bors[bot]

src/serial.rs

@@ -1478,6 +1478,9 @@ macro_rules! halUsartImpl {
                 }
 
                 /// Starts listening for an interrupt event
+                ///
+                /// Note, you will also have to enable the corresponding interrupt
+                /// in the NVIC to start receiving events.
                 pub fn listen(&mut self, event: Event) {
                     match event {
                         Event::Rxne => {