Merge pull request #2487 from Murmele/pwm

PWM Improvements

embassy-nrf/src/pwm.rs

@@ -736,6 +736,11 @@ impl<'d, T: Instance> SimplePwm<'d, T> {
         r.enable.write(|w| w.enable().disabled());
     }
 
+    /// Returns the current duty of the channel
+    pub fn duty(&self, channel: usize) -> u16 {
+        self.duty[channel]
+    }
+
     /// Sets duty cycle (15 bit) for a PWM channel.
     pub fn set_duty(&mut self, channel: usize, duty: u16) {
         let r = T::regs();
@@ -755,7 +760,9 @@ impl<'d, T: Instance> SimplePwm<'d, T> {
 
         // defensive wait until waveform is loaded after seqstart so set_duty
         // can't be called again while dma is still reading
-        while r.events_seqend[0].read().bits() == 0 {}
+        if self.is_enabled() {
+            while r.events_seqend[0].read().bits() == 0 {}
+        }
     }
 
     /// Sets the PWM clock prescaler.