Remove AnyInputOnlyPin (#2071)

* Remove AnyInputOnlyPin

* Add section to migration guide

* Remove unnecessary enum

Co-authored-by: Dominic Fischer <14130965+Dominaezzz@users.noreply.github.com>

---------

Co-authored-by: Dominic Fischer <14130965+Dominaezzz@users.noreply.github.com>
Co-authored-by: Jesse Braham <jessebraham@users.noreply.github.com>

esp-hal/CHANGELOG.md

@@ -26,6 +26,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Removed the `async`, `embedded-hal-02`, `embedded-hal`, `embedded-io`, `embedded-io-async`, and `ufmt` features (#2070)
 - Removed the `GpioN` type aliasses. Use `GpioPin<N>` instead. (#2073)
 - Removed `Peripherals::take`. Use `esp_hal::init` to obtain `Peripherals` (#1999)
+- Removed `AnyInputOnlyPin` in favour of `AnyPin`. (#2071)
 
 ## [0.20.1] - 2024-08-30
 

esp-hal/MIGRATING-0.20.md

@@ -38,4 +38,6 @@ Instead of manually grabbing peripherals and setting up clocks, you should now c
 
 ## GPIO changes
 
-The `GpioN` type aliasses are no longer available. You can use `GpioPin<N>` instead.
+ - The `GpioN` type aliasses are no longer available. You can use `GpioPin<N>` instead.
+ - The `AnyInputOnlyPin` has been removed. Replace any use with `AnyPin`.
+ - The `NoPinType` has been removed. You can use `DummyPin` in its place.

esp-hal/src/gpio/any_pin.rs

@@ -1,39 +1,25 @@
 use super::*;
 
-#[derive(Clone, Copy)]
-enum Inverted {
-    NonInverted,
-    Inverted,
-}
-
-impl Inverted {
-    fn is_inverted(&self) -> bool {
-        match self {
-            Inverted::NonInverted => false,
-            Inverted::Inverted => true,
-        }
-    }
-}
-
-/// Generic pin wrapper for pins which can be Output or Input.
+/// A type-erased GPIO pin, with additional configuration options.
+///
+/// Note that accessing unsupported pin functions (e.g. trying to use an
+/// input-only pin as output) will panic.
 pub struct AnyPin<'d> {
     pin: ErasedPin,
-    inverted: Inverted,
+    is_inverted: bool,
     _phantom: PhantomData<&'d ()>,
 }
 
 impl<'d> AnyPin<'d> {
     /// Create wrapper for the given pin.
     #[inline]
-    pub fn new<P: OutputPin + InputPin + CreateErasedPin>(
-        pin: impl crate::peripheral::Peripheral<P = P> + 'd,
-    ) -> Self {
+    pub fn new<P: CreateErasedPin>(pin: impl crate::peripheral::Peripheral<P = P> + 'd) -> Self {
         crate::into_ref!(pin);
         let pin = pin.erased_pin(private::Internal);
 
         Self {
             pin,
-            inverted: Inverted::NonInverted,
+            is_inverted: false,
             _phantom: PhantomData,
         }
     }
@@ -49,7 +35,7 @@ impl<'d> AnyPin<'d> {
 
         Self {
             pin,
-            inverted: Inverted::Inverted,
+            is_inverted: true,
             _phantom: PhantomData,
         }
     }
@@ -61,7 +47,7 @@ impl<'d> crate::peripheral::Peripheral for AnyPin<'d> {
     unsafe fn clone_unchecked(&mut self) -> Self::P {
         Self {
             pin: unsafe { self.pin.clone_unchecked() },
-            inverted: self.inverted,
+            is_inverted: self.is_inverted,
             _phantom: PhantomData,
         }
     }
@@ -114,10 +100,10 @@ impl<'d> OutputPin for AnyPin<'d> {
     fn connect_peripheral_to_output(&mut self, signal: OutputSignal, _internal: private::Internal) {
         self.pin.connect_peripheral_to_output_with_options(
             signal,
-            self.inverted.is_inverted(),
+            self.is_inverted,
             false,
             false,
-            self.inverted.is_inverted(),
+            self.is_inverted,
             private::Internal,
         );
     }
@@ -131,7 +117,7 @@ impl<'d> OutputPin for AnyPin<'d> {
         force_via_gpio_mux: bool,
         _internal: private::Internal,
     ) {
-        if self.inverted.is_inverted() {
+        if self.is_inverted {
             self.pin.connect_peripheral_to_output_with_options(
                 signal,
                 true,
@@ -168,8 +154,8 @@ impl<'d> InputPin for AnyPin<'d> {
     fn connect_input_to_peripheral(&mut self, signal: InputSignal, _internal: private::Internal) {
         self.pin.connect_input_to_peripheral_with_options(
             signal,
-            self.inverted.is_inverted(),
-            self.inverted.is_inverted(),
+            self.is_inverted,
+            self.is_inverted,
             private::Internal,
         );
     }
@@ -181,7 +167,7 @@ impl<'d> InputPin for AnyPin<'d> {
         force_via_gpio_mux: bool,
         _internal: private::Internal,
     ) {
-        if self.inverted.is_inverted() {
+        if self.is_inverted {
             self.pin.connect_input_to_peripheral_with_options(
                 signal,
                 true,
@@ -198,85 +184,3 @@ impl<'d> InputPin for AnyPin<'d> {
         }
     }
 }
-
-/// Generic pin wrapper for pins which can only be Input.
-pub struct AnyInputOnlyPin<'d> {
-    pin: ErasedPin,
-    inverted: Inverted,
-    _phantom: PhantomData<&'d ()>,
-}
-
-impl<'d> AnyInputOnlyPin<'d> {
-    /// Create wrapper for the given pin.
-    #[inline]
-    pub fn new<P: InputPin + CreateErasedPin>(
-        pin: impl crate::peripheral::Peripheral<P = P> + 'd,
-    ) -> Self {
-        crate::into_ref!(pin);
-        let pin = pin.erased_pin(private::Internal);
-
-        Self {
-            pin,
-            inverted: Inverted::NonInverted,
-            _phantom: PhantomData,
-        }
-    }
-}
-
-impl<'d> crate::peripheral::Peripheral for AnyInputOnlyPin<'d> {
-    type P = Self;
-
-    unsafe fn clone_unchecked(&mut self) -> Self::P {
-        Self {
-            pin: unsafe { self.pin.clone_unchecked() },
-            inverted: self.inverted,
-            _phantom: PhantomData,
-        }
-    }
-}
-
-impl<'d> private::Sealed for AnyInputOnlyPin<'d> {}
-
-impl<'d> Pin for AnyInputOnlyPin<'d> {
-    delegate::delegate! {
-        to self.pin {
-            fn number(&self, _internal: private::Internal) -> u8;
-            fn sleep_mode(&mut self, on: bool, _internal: private::Internal);
-            fn set_alternate_function(&mut self, alternate: AlternateFunction, _internal: private::Internal);
-            fn is_listening(&self, _internal: private::Internal) -> bool;
-            fn listen_with_options(
-                &mut self,
-                event: Event,
-                int_enable: bool,
-                nmi_enable: bool,
-                wake_up_from_light_sleep: bool,
-                _internal: private::Internal,
-            );
-            fn unlisten(&mut self, _internal: private::Internal);
-            fn is_interrupt_set(&self, _internal: private::Internal) -> bool;
-            fn clear_interrupt(&mut self, _internal: private::Internal);
-            fn wakeup_enable(&mut self, enable: bool, event: WakeEvent, _internal: private::Internal);
-        }
-    }
-}
-
-impl<'d> InputPin for AnyInputOnlyPin<'d> {
-    delegate::delegate! {
-        to self.pin {
-            fn init_input(&self, pull_down: bool, pull_up: bool, _internal: private::Internal);
-            fn set_to_input(&mut self, _internal: private::Internal);
-            fn enable_input(&mut self, on: bool, _internal: private::Internal);
-            fn enable_input_in_sleep_mode(&mut self, on: bool, _internal: private::Internal);
-            fn is_input_high(&self, _internal: private::Internal) -> bool;
-            fn connect_input_to_peripheral(&mut self, signal: InputSignal, _internal: private::Internal);
-            fn connect_input_to_peripheral_with_options(
-                &mut self,
-                signal: InputSignal,
-                invert: bool,
-                force_via_gpio_mux: bool,
-                _internal: private::Internal,
-            );
-            fn disconnect_input_from_peripheral(&mut self, signal: InputSignal, _internal: private::Internal);
-        }
-    }
-}

esp-hal/src/gpio/mod.rs

@@ -25,8 +25,7 @@
 //! - [Input] pins can be used as digital inputs.
 //! - [Output] and [OutputOpenDrain] pins can be used as digital outputs.
 //! - [Flex] pin is a pin that can be used as an input and output pin.
-//! - [AnyPin] and [AnyInputOnlyPin] are type-erased GPIO pins with support for
-//!   inverted signalling.
+//! - [AnyPin] is a type-erased GPIO pin with support for inverted signalling.
 //! - [DummyPin] is a useful for cases where peripheral driver requires a pin,
 //!   but real pin cannot be used.
 //!
@@ -77,7 +76,7 @@ pub(crate) use crate::{touch_common, touch_into};
 mod any_pin;
 mod dummy_pin;
 
-pub use any_pin::{AnyInputOnlyPin, AnyPin};
+pub use any_pin::AnyPin;
 pub use dummy_pin::DummyPin;
 
 #[cfg(soc_etm)]