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// Notice:
// the MCU might need an extra reset to make the code actually running
#![no_std]
#![no_main]
use defmt::*;
use embassy_executor::Spawner;
use embassy_stm32::gpio::{AnyPin, Level, Output, Speed};
use embassy_stm32::rcc::{HSIPrescaler, 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) {
defmt::info!("Program Start");
let mut config = Config::default();
// System Clock seems need to be equal or lower than 16 MHz
config.rcc.hsi = Some(HSIPrescaler::DIV4);
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.PB4.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;
#[allow(clippy::empty_loop)]
loop {}
}
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