Merge #421

421: HL trait instead of H generic r=therealprof a=burrbull



Co-authored-by: Andrey Zgarbul <zgarbul.andrey@gmail.com>

Author: bors[bot]

CHANGELOG.md

@@ -7,7 +7,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
-- `gpio`: port and pin generics first, then mode, `PinMode` for modes instead of pins, other cleanups
+- `gpio`: port and pin generics first, then mode,
+  `PinMode` for modes instead of pins, `HL` trait, other cleanups
 
 ### Breaking changes
 

examples/exti.rs

@@ -40,7 +40,7 @@ fn EXTI9_5() {
 #[entry]
 fn main() -> ! {
     // initialization phase
-    let p = pac::Peripherals::take().unwrap();
+    let mut p = pac::Peripherals::take().unwrap();
     let _cp = cortex_m::peripheral::Peripherals::take().unwrap();
     {
         // the scope ensures that the int_pin reference is dropped before the first ISR can be executed.
@@ -55,8 +55,8 @@ fn main() -> ! {
         let int_pin = unsafe { &mut *INT_PIN.as_mut_ptr() };
         *int_pin = gpioa.pa7.into_floating_input(&mut gpioa.crl);
         int_pin.make_interrupt_source(&mut afio);
-        int_pin.trigger_on_edge(&p.EXTI, Edge::RisingFalling);
-        int_pin.enable_interrupt(&p.EXTI);
+        int_pin.trigger_on_edge(&mut p.EXTI, Edge::RisingFalling);
+        int_pin.enable_interrupt(&mut p.EXTI);
     } // initialization ends here
 
     unsafe {