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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::low_power::Executor;
use embassy_stm32::rcc::LsConfig;
use embassy_stm32::rtc::{Rtc, RtcConfig};
use embassy_stm32::{Config, Peri};
use embassy_time::Timer;
use static_cell::StaticCell;
use {defmt_rtt as _, panic_probe as _};
#[cortex_m_rt::entry]
fn main() -> ! {
Executor::take().run(|spawner| {
spawner.spawn(unwrap!(async_main(spawner)));
})
}
#[embassy_executor::task]
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);
// give the RTC to the executor...
let rtc = Rtc::new(p.RTC, RtcConfig::default());
static RTC: StaticCell<Rtc> = StaticCell::new();
let rtc = RTC.init(rtc);
embassy_stm32::low_power::stop_with_rtc(rtc);
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 {}
}
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