Allow inverting comparator on the fly

Author: usbalbin

src/comparator.rs

@@ -444,6 +444,10 @@ macro_rules! impl_comparator {
                 }
             }
 
+            pub fn set_inverted(&mut self, inverted: bool) {
+                self.regs.csr().modify(|_, w| w.pol().bit(inverted));
+            }
+
             /// Enables raising the `ADC_COMP` interrupt at the specified output signal edge
             pub fn listen(&self, edge: SignalEdge, exti: &EXTI) {
                 exti.listen($Event, edge);