Storing cryogenic samples in ultra-high vacuum

Embassy (EMBedded ASYnc) enables maintainable firmware

#![no_std]
Supports many MCUs
- STM32
- NRF
- RPi
- ESP
- ...
Provides network and USB stack

#[embassy_executor::main]
async fn main(spawner: Spawner) {
    // Initialize the embassy-nrf HAL.
    let p = embassy_nrf::init(Default::default());

    // Spawned tasks run in the background, concurrently.
    spawner.spawn(blink(p.P0_13.into()).unwrap());

    let mut button = Input::new(p.P0_11, Pull::Up);
    loop {
        // Asynchronously wait for GPIO events
        button.wait_for_low().await;
        info!("Button pressed!");
        button.wait_for_high().await;
        info!("Button released!");
    }
}

#[embassy_executor::task]
async fn blink(pin: Peri<'static, AnyPin>) {
    let mut led = Output::new(pin, Level::Low, OutputDrive::Standard);

    loop {
        // Timekeeping is globally available, no need to mess with hardware timers.
        led.set_high();
        Timer::after_millis(150).await;
        led.set_low();
        Timer::after_millis(150).await;
    }
}