Reset timer CNT register when PWM period is changed. This prevents the PWM from appearing to stop randomly

Author: Stephen D

src/timer.rs

@@ -254,6 +254,7 @@ mod sealed {
         fn start_one_pulse(&mut self);
         fn start_no_update(&mut self);
         fn cr1_reset(&mut self);
+        fn cnt_reset(&mut self);
     }
 
     pub trait WithPwm: General {
@@ -381,6 +382,10 @@ macro_rules! hal {
                 fn cr1_reset(&mut self) {
                     self.cr1.reset();
                 }
+				#[inline(always)]
+				fn cnt_reset(&mut self) {
+					self.cnt.reset();
+				}
             }
 
             $(with_dmar!($TIM, $memsize);)?

src/timer/pwm.rs

@@ -310,6 +310,7 @@ where
         let (psc, arr) = compute_arr_presc(period.raw(), clk.raw());
         self.tim.set_prescaler(psc);
         self.tim.set_auto_reload(arr).unwrap();
+        self.tim.cnt_reset();
     }
 }