Gpio support v2 (#26)

* Improve GPIO driver and add button example
- port and pcr registers are defined using paste!
- added pin configuration for slew rate, drive strength, mux function, etc...
- added button example to showcase input gpio feature

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

* Add pull-up pull-down config support for input gpio

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

* Replace GPIOs enum with existing ones in the PAC

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

* Remove init_gpio_pin function as it is done in hal init config

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

* Integrate feedback for the GPIO driver

- Add again missing IO peripherals
- Added function to configure separately slew rate, drive strength, pull.
- Revert comment changes

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

* Create user-readable field for the pin configuration

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

* examples: button: remove left-over OSTIMER initialization

While at that, also cargo fmt

* Fix warnings

* Add documentation for public functions

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

* Expose port and pcr registers to AnyPin implementation

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

* Remove unnecessary change

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

* Run cargo fmt

---------

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

2 files changed, 25 insertions, 4 deletions

diff --git a/examples/src/bin/blinky.rs b/examples/src/bin/blinky.rs
index ab1e59bdb..dd08ec0d9 100644
--- a/examples/src/bin/blinky.rs
+++ b/examples/src/bin/blinky.rs
@@ -3,7 +3,7 @@
 
 use embassy_executor::Spawner;
 use embassy_time::Timer;
-use hal::gpio::{Level, Output};
+use hal::gpio::{DriveStrength, Level, Output, SlewRate};
 use {defmt_rtt as _, embassy_mcxa as hal, panic_probe as _};
 
 #[embassy_executor::main]
@@ -12,9 +12,9 @@ async fn main(_spawner: Spawner) {
 
     defmt::info!("Blink example");
 
-    let mut red = Output::new(p.P3_18, Level::High);
-    let mut green = Output::new(p.P3_19, Level::High);
-    let mut blue = Output::new(p.P3_21, Level::High);
+    let mut red = Output::new(p.P3_18, Level::High, DriveStrength::Normal, SlewRate::Fast);
+    let mut green = Output::new(p.P3_19, Level::High, DriveStrength::Normal, SlewRate::Fast);
+    let mut blue = Output::new(p.P3_21, Level::High, DriveStrength::Normal, SlewRate::Fast);
 
     loop {
         defmt::info!("Toggle LEDs");
diff --git a/examples/src/bin/button.rs b/examples/src/bin/button.rs
new file mode 100644
index 000000000..2abfe0a9f
--- /dev/null
+++ b/examples/src/bin/button.rs
@@ -0,0 +1,21 @@
+#![no_std]
+#![no_main]
+
+use embassy_executor::Spawner;
+use embassy_time::Timer;
+use hal::gpio::{DriveStrength, Input, Pull, SlewRate};
+use {defmt_rtt as _, embassy_mcxa as hal, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let p = hal::init(hal::config::Config::default());
+
+    defmt::info!("Button example");
+
+    let monitor = Input::new(p.P1_7, Pull::Disabled, DriveStrength::Normal, SlewRate::Slow);
+
+    loop {
+        defmt::info!("Pin level is {:?}", monitor.get_level());
+        Timer::after_millis(1000).await;
+    }
+}