stm32f0: Enable debug access in low power modes

examples/stm32f0/src/bin/hello.rs

@@ -14,7 +14,7 @@ use embassy_stm32::Peripherals;
 #[path = "../example_common.rs"]
 mod example_common;
 
-#[embassy::main]
+#[embassy::main(config = "example_common::config()")]
 async fn main(_spawner: Spawner, _p: Peripherals) -> ! {
     loop {
         Timer::after(Duration::from_secs(1)).await;

examples/stm32f0/src/example_common.rs

@@ -6,6 +6,14 @@ use panic_probe as _;
 pub use defmt::*;
 
 use core::sync::atomic::{AtomicUsize, Ordering};
+use embassy_stm32::rcc;
+use embassy_stm32::Config;
+
+pub fn config() -> Config {
+    let mut rcc_config = rcc::Config::default();
+    rcc_config.enable_debug_wfe = true;
+    Config::default().rcc(rcc_config)
+}
 
 defmt::timestamp! {"{=u64}", {
         static COUNT: AtomicUsize = AtomicUsize::new(0);