Fix temperature display

src/main.rs

@@ -307,12 +307,12 @@ fn main() -> ! {
                 state = State::Off;
             }
 
-            let mut text: String<9> = String::new();
+            let mut text: String<12> = String::new();
             let text_str;
 
             match thermocouple_result {
                 Ok(temperature) => {
-                    if let Err(_) = write!(&mut text, "{}", temperature) {
+                    if let Err(_) = write!(&mut text, "{} °C", temperature) {
                         text_str = "format error";
                     } else {
                         text_str = text.as_str();

src/max6675.rs

@@ -65,7 +65,7 @@ where
         if d & 0x4 == 0x4 {
             Err(Error::OpenThermocouple)
         } else {
-            Ok(FixedU16::from_num(d >> 3))
+            Ok(FixedU16::from_bits(d >> 3))
         }
     }
 }