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stm32l5: add low-power stop example

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This commit is contained in:
Christian Enderle 2024-01-02 23:05:58 +01:00
parent f1c077ed2e
commit 3830300990
2 changed files with 66 additions and 1 deletions
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6
examples/stm32l5/Cargo.toml
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@ -6,7 +6,7 @@ license = "MIT OR Apache-2.0"
[dependencies]
# Change stm32l552ze to your chip name, if necessary.
embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = [ "defmt", "unstable-pac", "stm32l552ze", "time-driver-any", "exti", "memory-x"] }
embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = [ "defmt", "unstable-pac", "stm32l552ze", "time-driver-any", "exti", "memory-x", "low-power"] }
embassy-sync = { version = "0.5.0", path = "../../embassy-sync", features = ["defmt"] }
embassy-executor = { version = "0.4.0", path = "../../embassy-executor", features = ["task-arena-size-32768", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
embassy-time = { version = "0.2", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
@ -30,3 +30,7 @@ static_cell = "2"
[profile.release]
debug = 2
[[bin]]
name = "stop"
default-features = ["embassy-stm32/low-power"]

61
examples/stm32l5/src/bin/stop.rs Normal file
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@ -0,0 +1,61 @@
#![no_std]
#![no_main]
use defmt::*;
use embassy_executor::Spawner;
use embassy_stm32::gpio::{Level, Output, Speed, AnyPin};
use embassy_stm32::low_power::Executor;
use embassy_stm32::rtc::{Rtc, RtcConfig};
use embassy_stm32::Config;
use embassy_stm32::rcc::LsConfig;
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| {
unwrap!(spawner.spawn(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);
unwrap!(spawner.spawn(blinky(p.PC7.into())));
unwrap!(spawner.spawn(timeout()));
}
#[embassy_executor::task]
async fn blinky(led: 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 {}
}