examples/stm32l5/src/bin/stop.rs


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#![no_std]
#![no_main]

use defmt::*;
use embassy_executor::Spawner;
use embassy_stm32::gpio::{AnyPin, Level, Output, Speed};
use embassy_stm32::rcc::LsConfig;
use embassy_stm32::{Config, Peri, low_power};
use embassy_time::Timer;
use {defmt_rtt as _, panic_probe as _};

#[embassy_executor::main(executor = "low_power::Executor")]
async fn async_main(spawner: Spawner) {
    let mut config = Config::default();
    config.rcc.ls = LsConfig::default_lsi();
    // when enabled the power-consumption is much higher during stop, but debugging and RTT is working
    // if you wan't to measure the power-consumption, or for production: uncomment this line
    // config.enable_debug_during_sleep = false;
    let p = embassy_stm32::init(config);

    spawner.spawn(unwrap!(blinky(p.PC7.into())));
    spawner.spawn(unwrap!(timeout()));
}

#[embassy_executor::task]
async fn blinky(led: Peri<'static, AnyPin>) -> ! {
    let mut led = Output::new(led, Level::Low, Speed::Low);
    loop {
        info!("high");
        led.set_high();
        Timer::after_millis(300).await;

        info!("low");
        led.set_low();
        Timer::after_millis(300).await;
    }
}

// when enable_debug_during_sleep is false, it is more difficult to reprogram the MCU
// therefore we block the MCU after 30s to be able to reprogram it easily
#[embassy_executor::task]
async fn timeout() -> ! {
    Timer::after_secs(30).await;
    loop {}
}