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, 14 insertions, 1 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 7fccc86c5..fb204d27b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -18,7 +18,6 @@ pub mod lpuart;
 pub mod ostimer;
 pub mod rtc;
 
-#[cfg(feature = "rt")]
 pub use crate::pac::NVIC_PRIO_BITS;
 
 #[rustfmt::skip]
@@ -347,10 +346,24 @@ pub fn init(cfg: crate::config::Config) -> Peripherals {
     crate::interrupt::RTC.set_priority(cfg.rtc_interrupt_priority);
     // Apply user-configured priority early; enabling is left to examples/apps
     crate::interrupt::ADC1.set_priority(cfg.adc_interrupt_priority);
+    // Apply user-configured priority early; enabling is left to examples/apps
+    crate::interrupt::GPIO0.set_priority(cfg.gpio_interrupt_priority);
+    // Apply user-configured priority early; enabling is left to examples/apps
+    crate::interrupt::GPIO1.set_priority(cfg.gpio_interrupt_priority);
+    // Apply user-configured priority early; enabling is left to examples/apps
+    crate::interrupt::GPIO2.set_priority(cfg.gpio_interrupt_priority);
+    // Apply user-configured priority early; enabling is left to examples/apps
+    crate::interrupt::GPIO3.set_priority(cfg.gpio_interrupt_priority);
+    // Apply user-configured priority early; enabling is left to examples/apps
+    crate::interrupt::GPIO4.set_priority(cfg.gpio_interrupt_priority);
 
     // Configure clocks
     crate::clocks::init(cfg.clock_cfg).unwrap();
 
+    unsafe {
+        crate::gpio::init();
+    }
+
     // Initialize embassy-time global driver backed by OSTIMER0
     #[cfg(feature = "time")]
     crate::ostimer::time_driver::init(crate::config::Config::default().time_interrupt_priority, 1_000_000);