9 files changed, 383 insertions, 0 deletions

diff --git a/examples/stm32wle5/.cargo/config.toml b/examples/stm32wle5/.cargo/config.toml
new file mode 100644
index 000000000..0178d377c
--- /dev/null
+++ b/examples/stm32wle5/.cargo/config.toml
@@ -0,0 +1,9 @@
+[target.'cfg(all(target_arch = "arm", target_os = "none"))']
+# replace your chip as listed in `probe-rs chip list`
+runner = "probe-rs run --chip STM32WLE5JCIx --connect-under-reset"
+
+[build]
+target = "thumbv7em-none-eabi"
+
+[env]
+DEFMT_LOG = "info"
diff --git a/examples/stm32wle5/Cargo.toml b/examples/stm32wle5/Cargo.toml
new file mode 100644
index 000000000..f2fc4dd3d
--- /dev/null
+++ b/examples/stm32wle5/Cargo.toml
@@ -0,0 +1,38 @@
+[package]
+edition = "2024"
+name = "embassy-stm32wl-examples"
+version = "0.1.0"
+license = "MIT OR Apache-2.0"
+publish = false
+
+[dependencies]
+# Change stm32wl55jc-cm4 to your chip name, if necessary.
+embassy-stm32 = { version = "0.4.0", path = "../../embassy-stm32", features = ["defmt", "stm32wle5jc", "time-driver-any", "memory-x", "unstable-pac", "exti", "low-power"] }
+embassy-sync = { version = "0.7.2", path = "../../embassy-sync", features = ["defmt"] }
+embassy-executor = { version = "0.9.0", path = "../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "defmt"] }
+embassy-time = { version = "0.5.0", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-1_000"] }
+embassy-embedded-hal = { version = "0.5.0", path = "../../embassy-embedded-hal" }
+
+defmt = "1.0.1"
+defmt-rtt = { version = "1.1.0", optional = true }
+defmt-serial = { version = "0.10.0", optional = true }
+
+cortex-m = { version = "0.7.6", features = ["inline-asm", "critical-section-single-core"] }
+cortex-m-rt = "0.7.0"
+embedded-hal = "1.0.0"
+embedded-storage = "0.3.1"
+panic-probe = { version = "1.0.0", features = ["print-defmt"] }
+static_cell = { version = "2.1.1", default-features = false }
+
+[profile.release]
+debug = 2
+
+[package.metadata.embassy]
+build = [
+  { target = "thumbv7em-none-eabi", artifact-dir = "out/examples/stm32wl" }
+]
+
+[features]
+default = ["defmt-serial"]
+defmt-rtt = ["dep:defmt-rtt"]
+defmt-serial = ["dep:defmt-serial"]
diff --git a/examples/stm32wle5/README.md b/examples/stm32wle5/README.md
new file mode 100644
index 000000000..18c3b5071
--- /dev/null
+++ b/examples/stm32wle5/README.md
@@ -0,0 +1,52 @@
+# Low Power Examples for STM32WLEx family
+
+Examples in this repo should work with [LoRa-E5 Dev Board](https://www.st.com/en/partner-products-and-services/lora-e5-development-kit.html) board.
+
+## Prerequsits
+
+- Connect a usb serial adapter to LPUart1 (this is where ALL logging will go)
+- Optional: Connect an amp meter that ran measure down to 0.1uA to the power test pins
+- `cargo install defmt-print` so you can print log messahes from LPUart1
+
+## Example Notes
+
+All examples will set all pins to analog mode before configuring pins for the example, if any. This saves about 500uA!!!!
+
+- the `adc` example will sleep in STOP1 betwen samples and the chip will only draw about 13uA while sleeping
+- the `blinky` example will sleep in STOP2 and the chip will only draw 1uA or less while sleeping
+- the `button_exti` example will sleep in STOP2 and the chip will only draw 1uA or less while sleeping
+- the `i2c` examples will sleep in STOP1 between reads and the chip only draw about 10uA while sleeping
+
+For each example you will need to start `defmt-print` with the example binary and the correct serial port in a seperate terminal.  Example:
+```
+defmt-print -w -v -e target/thumbv7em-none-eabi/debug/<module-name> serial --path /dev/cu.usbserial-00000000 --baud 115200
+```
+
+Run individual examples with
+```
+cargo flash --chip STM32WLE5JCIx --connect-under-reset --bin <module-name>
+```
+for example
+```
+cargo flash --chip STM32WLE5JCIx --connect-under-reset --bin blinky
+```
+
+You can also run them with with `run`.  However in this case expect probe-rs to be disconnected as soon as flashing is done as all IO pins are set to analog input!
+```
+cargo run --bin blinky
+```
+
+## Checklist before running examples
+You might need to adjust `.cargo/config.toml`, `Cargo.toml` and possibly update pin numbers or peripherals to match the specific MCU or board you are using.
+
+* [ ] Update .cargo/config.toml with the correct probe-rs command to use your specific MCU. For example for L432KCU6 it should be `probe-rs run --chip STM32L432KCUx`. (use `probe-rs chip list` to find your chip)
+* [ ] Update Cargo.toml to have the correct `embassy-stm32` feature. For example for L432KCU6 it should be `stm32l432kc`. Look in the `Cargo.toml` file of the `embassy-stm32` project to find the correct feature flag for your chip.
+* [ ] If your board has a special clock or power configuration, make sure that it is set up appropriately.
+* [ ] If your board has different pin mapping, update any pin numbers or peripherals in the given example code to match your schematic
+
+If you are unsure, please drop by the Embassy Matrix chat for support, and let us know:
+
+* Which example you are trying to run
+* Which chip and board you are using
+
+Embassy Chat: https://matrix.to/#/#embassy-rs:matrix.org
diff --git a/examples/stm32wle5/build.rs b/examples/stm32wle5/build.rs
new file mode 100644
index 000000000..8cd32d7ed
--- /dev/null
+++ b/examples/stm32wle5/build.rs
@@ -0,0 +1,5 @@
+fn main() {
+    println!("cargo:rustc-link-arg-bins=--nmagic");
+    println!("cargo:rustc-link-arg-bins=-Tlink.x");
+    println!("cargo:rustc-link-arg-bins=-Tdefmt.x");
+}
diff --git a/examples/stm32wle5/src/bin/adc.rs b/examples/stm32wle5/src/bin/adc.rs
new file mode 100644
index 000000000..8cc84ccdf
--- /dev/null
+++ b/examples/stm32wle5/src/bin/adc.rs
@@ -0,0 +1,67 @@
+#![no_std]
+#![no_main]
+
+use defmt::*;
+#[cfg(feature = "defmt-rtt")]
+use defmt_rtt as _;
+use embassy_executor::Spawner;
+use embassy_stm32::adc::{Adc, SampleTime};
+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;
+    // enable ADC with HSI clock
+    config.rcc.mux.adcsel = embassy_stm32::pac::rcc::vals::Adcsel::HSI;
+    #[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);
+
+    #[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 adc = Adc::new(p.ADC1);
+    let mut pin = p.PA10;
+
+    let mut vrefint = adc.enable_vrefint();
+    let vrefint_sample = adc.blocking_read(&mut vrefint, SampleTime::CYCLES79_5);
+    let convert_to_millivolts = |sample| {
+        // From https://www.st.com/resource/en/datasheet/stm32g031g8.pdf
+        // 6.3.3 Embedded internal reference voltage
+        const VREFINT_MV: u32 = 1212; // mV
+
+        (u32::from(sample) * VREFINT_MV / u32::from(vrefint_sample)) as u16
+    };
+
+    loop {
+        let v = adc.blocking_read(&mut pin, SampleTime::CYCLES79_5);
+        info!("--> {} - {} mV", v, convert_to_millivolts(v));
+        Timer::after_secs(1).await;
+    }
+}
diff --git a/examples/stm32wle5/src/bin/blinky.rs b/examples/stm32wle5/src/bin/blinky.rs
new file mode 100644
index 000000000..3b7eb7761
--- /dev/null
+++ b/examples/stm32wle5/src/bin/blinky.rs
@@ -0,0 +1,58 @@
+#![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);
+
+    #[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(15000).await;
+
+        info!("high");
+        led.set_high();
+        Timer::after_millis(15000).await;
+    }
+}
diff --git a/examples/stm32wle5/src/bin/button_exti.rs b/examples/stm32wle5/src/bin/button_exti.rs
new file mode 100644
index 000000000..9ffc39948
--- /dev/null
+++ b/examples/stm32wle5/src/bin/button_exti.rs
@@ -0,0 +1,64 @@
+#![no_std]
+#![no_main]
+
+use defmt::*;
+#[cfg(feature = "defmt-rtt")]
+use defmt_rtt as _;
+use embassy_executor::Spawner;
+use embassy_stm32::exti::{self, ExtiInput};
+use embassy_stm32::gpio::Pull;
+use embassy_stm32::{bind_interrupts, interrupt, low_power};
+use panic_probe as _;
+use static_cell::StaticCell;
+
+bind_interrupts!(
+    pub struct Irqs{
+        EXTI0 => exti::InterruptHandler<interrupt::typelevel::EXTI0>;
+});
+
+#[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;
+    // enable ADC with HSI clock
+    config.rcc.mux.adcsel = embassy_stm32::pac::rcc::vals::Adcsel::HSI;
+    #[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);
+
+    #[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 button = ExtiInput::new(p.PA0, p.EXTI0, Pull::Up, Irqs);
+
+    info!("Press the USER button...");
+
+    loop {
+        button.wait_for_falling_edge().await;
+        info!("Pressed!");
+        button.wait_for_rising_edge().await;
+        info!("Released!");
+    }
+}
diff --git a/examples/stm32wle5/src/bin/i2c.rs b/examples/stm32wle5/src/bin/i2c.rs
new file mode 100644
index 000000000..8e7a6e2d8
--- /dev/null
+++ b/examples/stm32wle5/src/bin/i2c.rs
@@ -0,0 +1,77 @@
+#![no_std]
+#![no_main]
+
+use defmt::*;
+#[cfg(feature = "defmt-rtt")]
+use defmt_rtt as _;
+use embassy_executor::Spawner;
+use embassy_stm32::i2c::I2c;
+use embassy_stm32::time::Hertz;
+use embassy_stm32::{bind_interrupts, i2c, low_power, peripherals};
+use embassy_time::{Duration, Timer};
+use panic_probe as _;
+use static_cell::StaticCell;
+
+bind_interrupts!(struct IrqsI2C{
+    I2C2_EV => i2c::EventInterruptHandler<peripherals::I2C2>;
+    I2C2_ER => i2c::ErrorInterruptHandler<peripherals::I2C2>;
+});
+
+#[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;
+    // enable ADC with HSI clock
+    config.rcc.mux.i2c2sel = embassy_stm32::pac::rcc::vals::I2c2sel::HSI;
+    #[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);
+
+    #[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 en3v3 = embassy_stm32::gpio::Output::new(
+        p.PA9,
+        embassy_stm32::gpio::Level::High,
+        embassy_stm32::gpio::Speed::High,
+    );
+    core::mem::forget(en3v3); // keep the output pin enabled
+
+    let mut i2c = I2c::new(p.I2C2, p.PB15, p.PA15, IrqsI2C, p.DMA1_CH6, p.DMA1_CH7, {
+        let mut config = i2c::Config::default();
+        config.frequency = Hertz::khz(100);
+        config.timeout = Duration::from_millis(1000);
+        config
+    });
+
+    loop {
+        let mut buffer = [0; 2];
+        // read the temperature register of the onboard lm75
+        match i2c.read(0x48, &mut buffer).await {
+            Ok(_) => info!("--> {:?}", buffer),
+            Err(e) => info!("--> Error: {:?}", e),
+        }
+        Timer::after_secs(5).await;
+    }
+}
diff --git a/examples/stm32wle5/stm32wle5.code-workspace b/examples/stm32wle5/stm32wle5.code-workspace
new file mode 100644
index 000000000..a7c4a0ebd
--- /dev/null
+++ b/examples/stm32wle5/stm32wle5.code-workspace
@@ -0,0 +1,13 @@
+{
+        "folders": [
+                {
+                        "path": "."
+                }
+        ],
+        "settings": {
+                "rust-analyzer.cargo.target": "thumbv7em-none-eabi",
+                "rust-analyzer.cargo.allTargets": false,
+                "rust-analyzer.cargo.targetDir": "target/rust-analyzer",
+                "rust-analyzer.checkOnSave": true,
+        }
+}