Add stm32u0 support.

6 files changed, 114 insertions, 0 deletions

diff --git a/examples/stm32u0/.cargo/config.toml b/examples/stm32u0/.cargo/config.toml
new file mode 100644
index 000000000..688347084
--- /dev/null
+++ b/examples/stm32u0/.cargo/config.toml
@@ -0,0 +1,9 @@
+[target.'cfg(all(target_arch = "arm", target_os = "none"))']
+# replace stm32u083rctx with your chip as listed in `probe-rs chip list`
+runner = "probe-rs run --chip stm32u083rctx"
+
+[build]
+target = "thumbv6m-none-eabi"
+
+[env]
+DEFMT_LOG = "trace"
diff --git a/examples/stm32u0/Cargo.toml b/examples/stm32u0/Cargo.toml
new file mode 100644
index 000000000..495be3e75
--- /dev/null
+++ b/examples/stm32u0/Cargo.toml
@@ -0,0 +1,25 @@
+[package]
+edition = "2021"
+name = "embassy-stm32u0-examples"
+version = "0.1.0"
+license = "MIT OR Apache-2.0"
+
+[dependencies]
+# Change stm32u083rc to your chip name, if necessary.
+embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = [ "defmt", "time-driver-any", "stm32u083rc", "memory-x", "unstable-pac", "exti"]  }
+embassy-sync = { version = "0.5.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-executor = { version = "0.5.0", path = "../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
+embassy-time = { version = "0.3.0", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
+
+defmt = "0.3"
+defmt-rtt = "0.4"
+
+cortex-m = { version = "0.7.6", features = ["critical-section-single-core"] }
+cortex-m-rt = "0.7.0"
+embedded-hal = "0.2.6"
+panic-probe = { version = "0.3", features = ["print-defmt"] }
+futures = { version = "0.3.17", default-features = false, features = ["async-await"] }
+heapless = { version = "0.8", default-features = false }
+
+[profile.release]
+debug = 2
diff --git a/examples/stm32u0/build.rs b/examples/stm32u0/build.rs
new file mode 100644
index 000000000..8cd32d7ed
--- /dev/null
+++ b/examples/stm32u0/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/stm32u0/src/bin/blinky.rs b/examples/stm32u0/src/bin/blinky.rs
new file mode 100644
index 000000000..90e479aae
--- /dev/null
+++ b/examples/stm32u0/src/bin/blinky.rs
@@ -0,0 +1,26 @@
+#![no_std]
+#![no_main]
+
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_stm32::gpio::{Level, Output, Speed};
+use embassy_time::Timer;
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let p = embassy_stm32::init(Default::default());
+    info!("Hello World!");
+
+    let mut led = Output::new(p.PA5, Level::High, Speed::Low);
+
+    loop {
+        info!("high");
+        led.set_high();
+        Timer::after_millis(300).await;
+
+        info!("low");
+        led.set_low();
+        Timer::after_millis(300).await;
+    }
+}
diff --git a/examples/stm32u0/src/bin/button.rs b/examples/stm32u0/src/bin/button.rs
new file mode 100644
index 000000000..8017f0274
--- /dev/null
+++ b/examples/stm32u0/src/bin/button.rs
@@ -0,0 +1,24 @@
+#![no_std]
+#![no_main]
+
+use cortex_m_rt::entry;
+use defmt::*;
+use embassy_stm32::gpio::{Input, Pull};
+use {defmt_rtt as _, panic_probe as _};
+
+#[entry]
+fn main() -> ! {
+    info!("Hello World!");
+
+    let p = embassy_stm32::init(Default::default());
+
+    let button = Input::new(p.PC13, Pull::Up);
+
+    loop {
+        if button.is_high() {
+            info!("high");
+        } else {
+            info!("low");
+        }
+    }
+}
diff --git a/examples/stm32u0/src/bin/button_exti.rs b/examples/stm32u0/src/bin/button_exti.rs
new file mode 100644
index 000000000..34a08bbc6
--- /dev/null
+++ b/examples/stm32u0/src/bin/button_exti.rs
@@ -0,0 +1,25 @@
+#![no_std]
+#![no_main]
+
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_stm32::exti::ExtiInput;
+use embassy_stm32::gpio::Pull;
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let p = embassy_stm32::init(Default::default());
+    info!("Hello World!");
+
+    let mut button = ExtiInput::new(p.PC13, p.EXTI13, Pull::Up);
+
+    info!("Press the USER button...");
+
+    loop {
+        button.wait_for_falling_edge().await;
+        info!("Pressed!");
+        button.wait_for_rising_edge().await;
+        info!("Released!");
+    }
+}