Merge #540

540: Initial support for STM32F3 r=Dirbaio a=VasanthakumarV

The [companion PR](https://github.com/embassy-rs/stm32-data/pull/109) in `stm32-data` should be merged before this PR.
The examples were tested on an STM32F303VC MCU.

Co-authored-by: VasanthakumarV <[email protected]>
Co-authored-by: Dario Nieuwenhuis <[email protected]>

1 files changed, 19 insertions, 0 deletions

diff --git a/examples/stm32f3/src/example_common.rs b/examples/stm32f3/src/example_common.rs
new file mode 100644
index 000000000..e14517033
--- /dev/null
+++ b/examples/stm32f3/src/example_common.rs
@@ -0,0 +1,19 @@
+#![macro_use]
+
+use defmt_rtt as _; // global logger
+use panic_probe as _;
+
+pub use defmt::*;
+
+use core::sync::atomic::{AtomicUsize, Ordering};
+
+defmt::timestamp! {
+    "{=u64}",
+    {
+        static COUNT: AtomicUsize = AtomicUsize::new(0);
+        // NOTE(no-CAS) `timestamps` runs with interrupts disabled
+        let n = COUNT.load(Ordering::Relaxed);
+        COUNT.store(n + 1, Ordering::Relaxed);
+        n as u64
+    }
+}