disable/enable adc dma

Author: burrbull

src/adc.rs

@@ -581,13 +581,22 @@ impl Adc<ADC1> {
     where
         Self:SetChannels<PINS>
     {
-        self.rb.cr1.modify(|_, w| w.scan().set_bit());
-        self.rb.cr2.modify(|_, w| w.cont().clear_bit());
-        self.rb.cr1.modify(|_, w| w.discen().clear_bit());
-        self.rb.cr2.modify(|_, w| w.align().bit(self.align.into()));
+        self.rb.cr2.modify(|_, w| w
+            .adon().clear_bit()
+            .dma().clear_bit()
+            .cont().clear_bit()
+            .align().bit(self.align.into())
+        );
+        self.rb.cr1.modify(|_, w| w
+            .scan().set_bit()
+            .discen().clear_bit()
+        );
         self.set_samples();
         self.set_sequence();
-        self.rb.cr2.modify(|_, w| w.dma().set_bit());
+        self.rb.cr2.modify(|_, w| w
+            .dma().set_bit()
+            .adon().set_bit()
+        );
 
         let payload = AdcPayload {
             adc: self,