debugging

src/main.rs

@@ -41,10 +41,11 @@ fn panic(info: &core::panic::PanicInfo) -> ! {
     if let Some(loc) = info.location() {
         ufmt::uwriteln!(
             &mut serial,
-            "  At {}:{}:{}\r",
+            "  At {}:{}:{} - {}\r",
             loc.file(),
             loc.line(),
             loc.column(),
+            info.message().as_str().unwrap_or("<no message avaliable>")
         )
         .unwrap_infallible();
     }
@@ -523,6 +524,7 @@ impl Show for NumberInput {
     }
 }
 
+#[derive(uDebug)]
 enum State {
     EnterSignificant,
     EnterExponent,
@@ -596,7 +598,7 @@ fn main() -> ! {
         let key = key.and_then(|(no, kn, ko)| InputKey::map(no, kn, ko));
 
         if let Some(key) = debounce.input(key) {
-            ufmt::uwriteln!(&mut serial, "key: {:?}", key).unwrap_infallible();
+            ufmt::uwriteln!(&mut serial, "key: {:?} state: {:?}", key, state).unwrap_infallible();
             let res = match state {
                 State::EnterSignificant => match key {
                     InputKey::C => Ok(number_input.reset()),
@@ -666,6 +668,7 @@ fn main() -> ! {
                 state = State::Err
             }
 
+            ufmt::uwriteln!(&mut serial, "state: {:?}", state).unwrap_infallible();
             match state {
                 State::EnterSignificant | State::EnterExponent | State::EnterOperation => {
                     number_input.show(&mut display)