Make interrupt module more standard.

- Move typelevel interrupts to a special-purpose mod: `embassy_xx::interrupt::typelevel`.
- Reexport the PAC interrupt enum in `embassy_xx::interrupt`.

This has a few advantages:
- The `embassy_xx::interrupt` module is now more "standard".
  - It works with `cortex-m` functions for manipulating interrupts, for example.
  - It works with RTIC.
- the interrupt enum allows holding value that can be "any interrupt at runtime", this can't be done with typelevel irqs.
- When "const-generics on enums" is stable, we can remove the typelevel interrupts without disruptive changes to `embassy_xx::interrupt`.

1 files changed, 2 insertions, 3 deletions

diff --git a/embassy-nrf/src/timer.rs b/embassy-nrf/src/timer.rs
index 2a0e16a50..dc3757856 100644
--- a/embassy-nrf/src/timer.rs
+++ b/embassy-nrf/src/timer.rs
@@ -8,7 +8,6 @@
 
 use embassy_hal_common::{into_ref, PeripheralRef};
 
-use crate::interrupt::Interrupt;
 use crate::ppi::{Event, Task};
 use crate::{pac, Peripheral};
 
@@ -29,7 +28,7 @@ pub(crate) mod sealed {
 /// Basic Timer instance.
 pub trait Instance: Peripheral<P = Self> + sealed::Instance + 'static + Send {
     /// Interrupt for this peripheral.
-    type Interrupt: Interrupt;
+    type Interrupt: crate::interrupt::typelevel::Interrupt;
 }
 
 /// Extended timer instance.
@@ -44,7 +43,7 @@ macro_rules! impl_timer {
             }
         }
         impl crate::timer::Instance for peripherals::$type {
-            type Interrupt = crate::interrupt::$irq;
+            type Interrupt = crate::interrupt::typelevel::$irq;
         }
     };
     ($type:ident, $pac_type:ident, $irq:ident) => {