Add random example

examples/stm32wl/src/bin/random.rs

@@ -0,0 +1,33 @@
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_stm32::pac;
+use embassy_stm32::rng::Rng;
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let mut config = embassy_stm32::Config::default();
+    config.rcc.mux = embassy_stm32::rcc::ClockSrc::HSE32;
+    config.rcc.enable_lsi = true; //Needed for RNG to work
+
+    let p = embassy_stm32::init(config);
+    unsafe {
+        pac::RCC.ccipr().modify(|w| {
+            w.set_rngsel(0b01);
+        });
+    }
+
+    info!("Hello World!");
+
+    let mut rng = Rng::new(p.RNG);
+
+    let mut buf = [0u8; 16];
+    unwrap!(rng.async_fill_bytes(&mut buf).await);
+    info!("random bytes: {:02x}", buf);
+
+    loop {}
+}