Enabled interruptable gpio on alternate function pins

Author: Cryowatt

CHANGELOG.md

@@ -13,6 +13,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
   - Use PascalCase for generated values of enums ([stm32-rs#727](https://github.com/stm32-rs/stm32-rs/pull/727))
 - Updated `synopsys-usb-otg` dependency 0.2.3 -> 0.3
 - Updated `stm32-fmc` dependency 0.2.0 -> 0.3
+- Added Interruptable trait to Alternate mode pins
 
 ## [v0.7.0] - 2022-06-05
 

src/gpio.rs

@@ -150,6 +150,7 @@ mod sealed {
 use sealed::Interruptable;
 impl<MODE> Interruptable for Output<MODE> {}
 impl<MODE> Interruptable for Input<MODE> {}
+impl<const A: u8, MODE> Interruptable for Alternate<A, MODE> {}
 
 /// External Interrupt Pin
 pub trait ExtiPin {