Add missing impls

Author: usbalbin

src/dac.rs

@@ -141,10 +141,18 @@ impl_pin_for_dac!(DAC2: (PA6<DefaultMode>, Dac2IntSig1), Dac2Ch1<M_MIX_SIG, Disa
 // DAC3 int
 impl_pin_for_dac!(DAC3: Dac3IntSig1, Dac3Ch1<M_INT_SIG, Disabled>);
 impl_pin_for_dac!(DAC3: Dac3IntSig2, Dac3Ch2<M_INT_SIG, Disabled>);
+impl_pin_for_dac!(
+    DAC3: (Dac3IntSig1, Dac3IntSig2),
+    (Dac3Ch1<M_INT_SIG, Disabled>, Dac3Ch2<M_INT_SIG, Disabled>)
+);
 
 // DAC4 int
 impl_pin_for_dac!(DAC4: Dac4IntSig1, Dac4Ch1<M_INT_SIG, Disabled>);
 impl_pin_for_dac!(DAC4: Dac4IntSig2, Dac4Ch2<M_INT_SIG, Disabled>);
+impl_pin_for_dac!(
+    DAC4: (Dac4IntSig1, Dac4IntSig2),
+    (Dac4Ch1<M_INT_SIG, Disabled>, Dac4Ch2<M_INT_SIG, Disabled>)
+);
 
 pub fn dac<DAC, PINS>(_dac: DAC, _pins: PINS, _rcc: &mut Rcc) -> PINS::Output
 where
@@ -180,6 +188,8 @@ macro_rules! dac_helper {
     ),)+) => {
         $(
             impl<const MODE_BITS: u8> $CX<MODE_BITS, Disabled> {
+                /// TODO: The DAC does not seem to work unless `calibrate_buffer` has been callen
+                /// even when only using dac output internally
                 pub fn enable(self) -> $CX<MODE_BITS, Enabled> {
                     let dac = unsafe { &(*<$DAC>::ptr()) };