rtc: add is_wakeup_timer_en

Author: newAM

CHANGELOG.md

@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - Added a `is_pending` method to the `gpio::Exti` trait.
 - Added alarm functionality to the RTC.
+- Added `Rtc.is_wakeup_timer_en`.
 
 ## [0.3.0] - 2021-12-20
 ### Added

hal/src/rtc/mod.rs

@@ -511,6 +511,12 @@ impl Rtc {
         self.rtc.cr.modify(|_, w| w.wute().set_bit());
     }
 
+    /// Returns `true` if the wakeup timer is enabled.
+    #[inline]
+    pub fn is_wakeup_timer_en(&self) -> bool {
+        self.rtc.cr.read().wute().bit_is_set()
+    }
+
     /// Disable the wakeup timer.
     #[inline]
     pub fn disable_wakeup_timer(&mut self) {