stm32/examples: cleanup L4

examples/stm32l4/src/bin/button_exti.rs

@@ -8,19 +8,25 @@
 
 #[path = "../example_common.rs"]
 mod example_common;
-use cortex_m_rt::entry;
-use embassy::executor::Executor;
-use embassy::time::Clock;
-use embassy::util::Forever;
+use defmt::panic;
+use embassy::executor::Spawner;
 use embassy_stm32::exti::ExtiInput;
 use embassy_stm32::gpio::{Input, Pull};
-use embassy_stm32::pac;
+use embassy_stm32::{pac, Peripherals};
 use embassy_traits::gpio::{WaitForFallingEdge, WaitForRisingEdge};
 use example_common::*;
 
-#[embassy::task]
-async fn main_task() {
-    let p = embassy_stm32::init(Default::default());
+#[embassy::main]
+async fn main(_spawner: Spawner, p: Peripherals) {
+    info!("Hello World!");
+
+    unsafe {
+        pac::DBGMCU.cr().modify(|w| {
+            w.set_dbg_sleep(true);
+            w.set_dbg_standby(true);
+            w.set_dbg_stop(true);
+        });
+    }
 
     let button = Input::new(p.PC13, Pull::Up);
     let mut button = ExtiInput::new(button, p.EXTI13);
@@ -34,34 +40,3 @@ async fn main_task() {
         info!("Released!");
     }
 }
-
-struct ZeroClock;
-
-impl Clock for ZeroClock {
-    fn now(&self) -> u64 {
-        0
-    }
-}
-
-static EXECUTOR: Forever<Executor> = Forever::new();
-
-#[entry]
-fn main() -> ! {
-    info!("Hello World!");
-
-    unsafe {
-        pac::DBGMCU.cr().modify(|w| {
-            w.set_dbg_sleep(true);
-            w.set_dbg_standby(true);
-            w.set_dbg_stop(true);
-        });
-    }
-
-    unsafe { embassy::time::set_clock(&ZeroClock) };
-
-    let executor = EXECUTOR.put(Executor::new());
-
-    executor.run(|spawner| {
-        unwrap!(spawner.spawn(main_task()));
-    })
-}