embassy/docs/modules/ROOT/examples/layer-by-layer/blinky-async/src/main.rs

#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]

use embassy::executor::Spawner;
use embassy_stm32::exti::ExtiInput;
use embassy_stm32::gpio::{Input, Level, Output, Pull, Speed};
use embassy_stm32::Peripherals;
use {defmt_rtt as _, panic_probe as _};

#[embassy::main]
async fn main(_s: Spawner, p: Peripherals) {
    let mut led = Output::new(p.PB14, Level::Low, Speed::VeryHigh);
    let mut button = ExtiInput::new(Input::new(p.PC13, Pull::Up), p.EXTI13);

    loop {
        button.wait_for_any_edge().await;
        if button.is_low() {
            led.set_high();
        } else {
            led.set_low();
        }
    }
}