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, 3 insertions, 3 deletions

diff --git a/Cargo.toml b/Cargo.toml
index cda340d02..96b7d6b0f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,7 +9,8 @@ categories = ["embedded", "hardware-support", "no-std"]
 
 [dependencies]
 cortex-m = { version = "0.7", features = ["critical-section-single-core"] }
-cortex-m-rt = { version = "0.7" }
+# If you would like "device" to be an optional feature, please open an issue.
+cortex-m-rt = { version = "0.7", features = ["device"] }
 critical-section = "1.2.0"
 defmt = { version = "1.0", optional = true }
 embassy-embedded-hal = "0.5.0"
@@ -25,6 +26,7 @@ heapless = "0.8"
 mcxa-pac = { git = "https://github.com/OpenDevicePartnership/mcxa-pac", features = ["rt", "critical-section"], version = "0.1.0" }
 nb = "1.1.0"
 paste = "1.0.15"
+maitake-sync = { version = "0.2.2", default-features = false, features = ["critical-section", "no-cache-pad"] }
 
 # `time` dependencies
 embassy-time = { version = "0.5.0", optional = true }
@@ -37,8 +39,6 @@ default = []
 # Use with one logger feature: defmt-rtt (preferred) or defmt-uart (fallback)
 defmt = ["dep:defmt", "mcxa-pac/defmt"]
 
-rt = ["cortex-m-rt/device"]
-
 unstable-pac = []
 
 # Embassy time