Correct gpio driver (#9)

* Correct gpio driver

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

* Simplify blinky example

Make it look like every other HAL for consistency. While at that, also
rename the example to match the name used by other HALs.

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

* Add some documentation to GPIO driver

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

* Enable GPIO clocks during HAL initialization

Provide the user with working GPIO clocks.

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

---------

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

1 files changed, 49 insertions, 0 deletions

diff --git a/examples/src/bin/blinky.rs b/examples/src/bin/blinky.rs
new file mode 100644
index 000000000..28d83a12e
--- /dev/null
+++ b/examples/src/bin/blinky.rs
@@ -0,0 +1,49 @@
+#![no_std]
+#![no_main]
+
+use embassy_executor::Spawner;
+use embassy_mcxa::bind_interrupts;
+use embassy_time::Timer;
+use hal::gpio::{Level, Output};
+use {defmt_rtt as _, embassy_mcxa as hal, panic_probe as _};
+
+// Bind only OS_EVENT for timer interrupts
+bind_interrupts!(struct Irqs {
+    OS_EVENT => hal::ostimer::time_driver::OsEventHandler;
+});
+
+#[used]
+#[no_mangle]
+static KEEP_OS_EVENT: unsafe extern "C" fn() = OS_EVENT;
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let p = hal::init(hal::config::Config::default());
+
+    defmt::info!("Blink example");
+
+    // Initialize embassy-time global driver backed by OSTIMER0
+    hal::ostimer::time_driver::init(hal::config::Config::default().time_interrupt_priority, 1_000_000);
+
+    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);
+
+    loop {
+        defmt::info!("Toggle LEDs");
+
+        red.toggle();
+        Timer::after_millis(250).await;
+
+        red.toggle();
+        green.toggle();
+        Timer::after_millis(250).await;
+
+        green.toggle();
+        blue.toggle();
+        Timer::after_millis(250).await;
+        blue.toggle();
+
+        Timer::after_millis(250).await;
+    }
+}