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#![no_std]
#![no_main]
use defmt::*;
#[cfg(feature = "defmt-rtt")]
use defmt_rtt as _;
use embassy_executor::Spawner;
use embassy_stm32::gpio::{Level, Output, Speed};
use embassy_stm32::low_power;
use embassy_time::Timer;
use panic_probe as _;
use static_cell::StaticCell;
#[embassy_executor::main(executor = "low_power::Executor")]
async fn async_main(_spawner: Spawner) {
let mut config = embassy_stm32::Config::default();
// enable HSI clock
config.rcc.hsi = true;
// enable LSI clock for RTC
config.rcc.ls = embassy_stm32::rcc::LsConfig::default_lsi();
config.rcc.msi = Some(embassy_stm32::rcc::MSIRange::RANGE4M);
config.rcc.sys = embassy_stm32::rcc::Sysclk::MSI;
#[cfg(feature = "defmt-serial")]
{
// disable debug during sleep to reduce power consumption since we are
// using defmt-serial on LPUART1.
config.enable_debug_during_sleep = false;
// if we are using defmt-serial on LPUART1, we need to use HSI for the clock
// so that its registers are preserved during STOP modes.
config.rcc.mux.lpuart1sel = embassy_stm32::pac::rcc::vals::Lpuart1sel::HSI;
}
// Initialize STM32WL peripherals (use default config like wio-e5-async example)
let p = embassy_stm32::init(config);
// start with all GPIOs as analog to reduce power consumption
for r in [
embassy_stm32::pac::GPIOA,
embassy_stm32::pac::GPIOB,
embassy_stm32::pac::GPIOC,
embassy_stm32::pac::GPIOH,
] {
r.moder().modify(|w| {
for i in 0..16 {
// don't reset these if probe-rs should stay connected!
#[cfg(feature = "defmt-rtt")]
if config.enable_debug_during_sleep && r == embassy_stm32::pac::GPIOA && [13, 14].contains(&i) {
continue;
}
w.set_moder(i, embassy_stm32::pac::gpio::vals::Moder::ANALOG);
}
});
}
#[cfg(feature = "defmt-serial")]
{
use embassy_stm32::mode::Blocking;
use embassy_stm32::usart::Uart;
let config = embassy_stm32::usart::Config::default();
let uart = Uart::new_blocking(p.LPUART1, p.PC0, p.PC1, config).expect("failed to configure UART!");
static SERIAL: StaticCell<Uart<'static, Blocking>> = StaticCell::new();
defmt_serial::defmt_serial(SERIAL.init(uart));
}
info!("Hello World!");
let mut led = Output::new(p.PB5, Level::High, Speed::Low);
loop {
info!("low");
led.set_low();
Timer::after_millis(500).await;
info!("high");
led.set_high();
Timer::after_millis(500).await;
}
}
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