Add GPIO interrupt support and embedded-hal-async trait implementation (#38)

* Add GPIO interrupt support and embedded-hal-async trait implementation

Signed-off-by: Mathis Deroo <[email protected]>

* Run cargo fmt

* Improve GPIO driver interrupt mechanism and example

- GPIO interrupt managed internally at the HAL level,
- Renamed and cleaned gpio_interrupt example; now button_async.rs,
- Use BitIter instead of simple for loop in the irq handler,
- Fix comments and add "rt" wrappen to GPIO IRQ handler.

Signed-off-by: Mathis Deroo <[email protected]>

* Modify INTERRUPT_DETECTED (AtomicBool to AtomicU32) to work with pin number and not only port number interrupt

Signed-off-by: Mathis Deroo <[email protected]>

* add embedded_hal_async::digital::* traits

Signed-off-by: Mathis Deroo <[email protected]>

* Update irq_handler with BitIter loop

Co-authored-by: Felipe Balbi <[email protected]>

* Add suggested changes

Signed-off-by: Mathis Deroo <[email protected]>

* cargo fmt

Signed-off-by: Felipe Balbi <[email protected]>

* WIP: Modify Wakers from AtomicWaker to WaitMap, with pin number (per PORT) as key

Signed-off-by: Mathis Deroo <[email protected]>

* Tweak maitake-sync usage

* Improve docs

* refactor a bit

* Move all of the async+interrupt stuff into a module

* Remove defmt debug traces

Signed-off-by: Mathis Deroo <[email protected]>

* cargo vet

* Move e-hal-async impls into the gated block

* "rt", begone!

---------

Signed-off-by: Mathis Deroo <[email protected]>
Signed-off-by: Felipe Balbi <[email protected]>
Co-authored-by: Felipe Balbi <[email protected]>
Co-authored-by: Felipe Balbi <[email protected]>
Co-authored-by: Felipe Balbi <[email protected]>
Co-authored-by: James Munns <[email protected]>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/config.rs b/src/config.rs
index 9c0d47ecb..8d52a1d44 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -9,6 +9,7 @@ pub struct Config {
     pub time_interrupt_priority: Priority,
     pub rtc_interrupt_priority: Priority,
     pub adc_interrupt_priority: Priority,
+    pub gpio_interrupt_priority: Priority,
     pub clock_cfg: ClocksConfig,
 }
 
@@ -19,6 +20,7 @@ impl Default for Config {
             time_interrupt_priority: Priority::from(0),
             rtc_interrupt_priority: Priority::from(0),
             adc_interrupt_priority: Priority::from(0),
+            gpio_interrupt_priority: Priority::from(0),
             clock_cfg: ClocksConfig::default(),
         }
     }