Add InputPin impl for generic open drain outputs (#160)

stm32-rs · Dec 29, 2019 · fa26e97 · fa26e97
1 parent bd54507
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+- Add `InputPin` impl for generic open drain outputs
+
 ## [v0.5.2] - 2019-12-15
 
 - Fix USB module docs

diff --git a/src/gpio.rs b/src/gpio.rs
@@ -731,6 +731,21 @@ macro_rules! impl_pxx {
             }
         }
 
+        impl InputPin for Pxx<Output<OpenDrain>> {
+            type Error = Infallible;
+            fn is_high(&self) -> Result<bool, Infallible> {
+                match self {
+                    $(Pxx::$pin(pin) => pin.is_high()),*
+                }
+            }
+
+            fn is_low(&self) -> Result<bool, Infallible> {
+                match self {
+                    $(Pxx::$pin(pin) => pin.is_low()),*
+                }
+            }
+        }
+
         impl<MODE> ExtiPin for Pxx<Input<MODE>> {
             fn make_interrupt_source(&mut self, afio: &mut afio::Parts) {
                 match self {