Provide ehal impls for DummyPin (#2019)

Co-authored-by: Scott Mabin <[email protected]>

esp-hal/CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- Implement `embedded-hal` output pin traits for `DummyPin` (#2019)
 - Added `esp_hal::init` to simplify HAL initialisation (#1970)
 
 ### Changed

esp-hal/src/gpio/dummy_pin.rs

@@ -132,3 +132,55 @@ impl InputPin for DummyPin {
 
     fn disconnect_input_from_peripheral(&mut self, _signal: InputSignal, _: private::Internal) {}
 }
+
+#[cfg(feature = "embedded-hal-02")]
+impl embedded_hal_02::digital::v2::OutputPin for DummyPin {
+    type Error = core::convert::Infallible;
+
+    fn set_high(&mut self) -> Result<(), Self::Error> {
+        self.set_output_high(true, private::Internal);
+        Ok(())
+    }
+    fn set_low(&mut self) -> Result<(), Self::Error> {
+        self.set_output_high(false, private::Internal);
+        Ok(())
+    }
+}
+#[cfg(feature = "embedded-hal-02")]
+impl embedded_hal_02::digital::v2::StatefulOutputPin for DummyPin {
+    fn is_set_high(&self) -> Result<bool, Self::Error> {
+        Ok(OutputPin::is_set_high(self, private::Internal))
+    }
+    fn is_set_low(&self) -> Result<bool, Self::Error> {
+        Ok(!OutputPin::is_set_high(self, private::Internal))
+    }
+}
+
+#[cfg(feature = "embedded-hal")]
+impl embedded_hal::digital::ErrorType for DummyPin {
+    type Error = core::convert::Infallible;
+}
+
+#[cfg(feature = "embedded-hal")]
+impl embedded_hal::digital::OutputPin for DummyPin {
+    fn set_low(&mut self) -> Result<(), Self::Error> {
+        self.set_output_high(true, private::Internal);
+        Ok(())
+    }
+
+    fn set_high(&mut self) -> Result<(), Self::Error> {
+        self.set_output_high(false, private::Internal);
+        Ok(())
+    }
+}
+
+#[cfg(feature = "embedded-hal")]
+impl embedded_hal::digital::StatefulOutputPin for DummyPin {
+    fn is_set_high(&mut self) -> Result<bool, Self::Error> {
+        Ok(OutputPin::is_set_high(self, private::Internal))
+    }
+
+    fn is_set_low(&mut self) -> Result<bool, Self::Error> {
+        Ok(!OutputPin::is_set_high(self, private::Internal))
+    }
+}