diff --git a/examples/stm32l5/Cargo.toml b/examples/stm32l5/Cargo.toml index 329e7b98d..c50314587 100644 --- a/examples/stm32l5/Cargo.toml +++ b/examples/stm32l5/Cargo.toml @@ -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"] diff --git a/examples/stm32l5/src/bin/stop.rs b/examples/stm32l5/src/bin/stop.rs new file mode 100644 index 000000000..21b30a266 --- /dev/null +++ b/examples/stm32l5/src/bin/stop.rs @@ -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 = 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 {} +}