Merge pull request #5108 from liebman/low-power-stm32wl5x

low-power: stm32wl5x

1 files changed, 57 insertions, 0 deletions

diff --git a/examples/stm32wl5x-lp/src/bin/blinky.rs b/examples/stm32wl5x-lp/src/bin/blinky.rs
new file mode 100644
index 000000000..60b671a77
--- /dev/null
+++ b/examples/stm32wl5x-lp/src/bin/blinky.rs
@@ -0,0 +1,57 @@
+// This example is configured for the nucleo-wl55jc board. Curret monitor should show just a few microamps when the device is in stop2 mode.
+#![no_std]
+#![no_main]
+
+use core::mem::MaybeUninit;
+
+use defmt::*;
+#[cfg(feature = "defmt-rtt")]
+use defmt_rtt as _;
+use embassy_executor::Spawner;
+use embassy_stm32::SharedData;
+use embassy_stm32::gpio::{Level, Output, Speed};
+use embassy_time::Timer;
+use panic_probe as _;
+
+#[unsafe(link_section = ".shared_data")]
+static SHARED_DATA: MaybeUninit<SharedData> = MaybeUninit::uninit();
+
+#[embassy_executor::main(executor = "embassy_stm32::Executor", entry = "cortex_m_rt::entry")]
+async fn async_main(_spawner: Spawner) {
+    let mut config = embassy_stm32::Config::default();
+    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;
+    }
+    let p = embassy_stm32::init_primary(config, &SHARED_DATA);
+
+    #[cfg(feature = "defmt-serial")]
+    {
+        use embassy_stm32::mode::Blocking;
+        use embassy_stm32::usart::Uart;
+        use static_cell::StaticCell;
+        let config = embassy_stm32::usart::Config::default();
+        let uart = Uart::new_blocking(p.LPUART1, p.PA3, p.PA2, 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.PB15, Level::High, Speed::Low);
+
+    loop {
+        info!("low");
+        led.set_low();
+        Timer::after_millis(5000).await;
+
+        info!("high");
+        led.set_high();
+        Timer::after_millis(5000).await;
+    }
+}