Add STM32WL55 examples to CI (#361)

* Add STM32WL55 examples to CI and fix warnings

.github/workflows/rust.yml

@@ -88,6 +88,8 @@ jobs:
             target: thumbv6m-none-eabi
           - package: examples/stm32wb55
             target: thumbv7em-none-eabihf
+          - package: examples/stm32wl55
+            target: thumbv7em-none-eabihf
           - package: examples/stm32f0
             target: thumbv6m-none-eabi
 

examples/stm32wl55/.cargo/config.toml

@@ -0,0 +1,21 @@
+[unstable]
+build-std = ["core"]
+
+[target.'cfg(all(target_arch = "arm", target_os = "none"))']
+# replace your chip as listed in `probe-run --list-chips`
+runner = "probe-run --chip STM32WLE5JCIx"
+
+rustflags = [
+  # LLD (shipped with the Rust toolchain) is used as the default linker
+  "-C", "link-arg=--nmagic",
+  "-C", "link-arg=-Tlink.x",
+  "-C", "link-arg=-Tdefmt.x",
+
+  # Code-size optimizations.
+  "-Z", "trap-unreachable=no",
+  "-C", "inline-threshold=5",
+  "-C", "no-vectorize-loops",
+]
+
+[build]
+target = "thumbv7em-none-eabihf"

examples/stm32wl55/src/bin/button.rs

@@ -9,7 +9,6 @@ mod example_common;
 use embassy_stm32::{
     dbgmcu::Dbgmcu,
     gpio::{Input, Level, Output, Pull, Speed},
-    rcc::*,
 };
 use embedded_hal::digital::v2::{InputPin, OutputPin};
 use example_common::*;
@@ -20,7 +19,7 @@ use cortex_m_rt::entry;
 fn main() -> ! {
     info!("Hello World!");
 
-    let mut p = embassy_stm32::init(Default::default());
+    let p = embassy_stm32::init(Default::default());
 
     unsafe { Dbgmcu::enable_all() };