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Merge #1191

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1191: stm32 gpio implement degrade to AnyPin r=Dirbaio a=JoshMcguigan

This PR implements a `degrade` method on the STM32 GPIO structs `Flex`/`Input`/`Output`/`OutputOpenDrain`. This allows, for example, transforming some `Input<T>` to an `Input<AnyPin>`.

Co-authored-by: Josh Mcguigan <joshmcg88@gmail.com>
This commit is contained in:
bors[bot] 2023-02-03 06:00:50 +00:00 committed by GitHub
commit 662a02a557
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1 changed files with 36 additions and 0 deletions
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embassy-stm32/src/gpio.rs
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@ -28,6 +28,21 @@ impl<'d, T: Pin> Flex<'d, T> {
Self { pin }
}
#[inline]
pub fn degrade(mut self) -> Flex<'d, AnyPin> {
// Safety: We are about to drop the other copy of this pin, so
// this clone is safe.
let pin = unsafe { self.pin.clone_unchecked() };
// We don't want to run the destructor here, because that would
// deconfigure the pin.
core::mem::forget(self);
Flex {
pin: pin.map_into::<AnyPin>(),
}
}
/// Put the pin into input mode.
#[inline]
pub fn set_as_input(&mut self, pull: Pull) {
@ -286,6 +301,13 @@ impl<'d, T: Pin> Input<'d, T> {
Self { pin }
}
#[inline]
pub fn degrade(self) -> Input<'d, AnyPin> {
Input {
pin: self.pin.degrade(),
}
}
#[inline]
pub fn is_high(&self) -> bool {
self.pin.is_high()
@ -345,6 +367,13 @@ impl<'d, T: Pin> Output<'d, T> {
Self { pin }
}
#[inline]
pub fn degrade(self) -> Output<'d, AnyPin> {
Output {
pin: self.pin.degrade(),
}
}
/// Set the output as high.
#[inline]
pub fn set_high(&mut self) {
@ -407,6 +436,13 @@ impl<'d, T: Pin> OutputOpenDrain<'d, T> {
Self { pin }
}
#[inline]
pub fn degrade(self) -> Output<'d, AnyPin> {
Output {
pin: self.pin.degrade(),
}
}
#[inline]
pub fn is_high(&self) -> bool {
!self.pin.is_low()