feat(gpio): add embassy async button input demo

README.md

@@ -9,14 +9,14 @@ This crate is a working-in-progress and not ready for use.
 
 - Peripherals:
   - [x] basic start up code: linker, startup
+  - [x] Embassy time driver using MCHTMR
   - [x] SYSCTL init
   - [x] PLL setting (only PLL0 is supported, since others might be unsafe)
   - [x] GPIO, Flex, Input, Output
+    - [x] Async GPIO
   - [x] RTT support (defmt, defmt-rtt)
-  - [x] UART support
-    - [x] blocking TX, RX
-  - [x] I2C support
-    - [x] blocking, eh traits
+  - [x] UART blocking TX, RX
+  - [x] I2C blocking
 - MCUs
   - HPM5300 - currently it's the only supported series
 

examples/embassy_button.rs

@@ -0,0 +1,27 @@
+#![no_main]
+#![no_std]
+#![feature(type_alias_impl_trait)]
+
+use embassy_executor::Spawner;
+use hpm_hal::gpio::{Input, Level, Output, Pull};
+use {defmt_rtt as _, hpm_hal as hal};
+
+#[embassy_executor::main(entry = "hpm_hal::entry")]
+async fn main(_spawner: Spawner) -> ! {
+    let p = hal::init(Default::default());
+
+    let mut button = Input::new(p.PA03, Pull::Down); // hpm5300evklite, BOOT1_KEY
+    let mut led = Output::new(p.PA10, Level::Low, Default::default());
+    loop {
+        button.wait_for_falling_edge().await;
+        defmt::info!("PA03 Button pressed! current={}", button.is_high());
+        led.toggle();
+    }
+}
+
+#[panic_handler]
+fn panic(_info: &core::panic::PanicInfo) -> ! {
+    //let _ = println!("\n\n\n{}", info);
+
+    loop {}
+}