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embassy_stm32::exti

Struct ExtiInput

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pub struct ExtiInput<'d> { /* private fields */ }
Expand description

EXTI input driver.

This driver augments a GPIO Input with EXTI functionality. EXTI is not built into Input itself because it needs to take ownership of the corresponding EXTI channel, which is a limited resource.

Pins PA5, PB5, PC5… all use EXTI channel 5, so you can’t use EXTI on, say, PA5 and PC5 at the same time.

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impl<'d> ExtiInput<'d>

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pub fn new<T: GpioPin>( pin: impl Peripheral<P = T> + 'd, ch: impl Peripheral<P = T::ExtiChannel> + 'd, pull: Pull, ) -> Self

Create an EXTI input.

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pub fn is_high(&self) -> bool

Get whether the pin is high.

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pub fn is_low(&self) -> bool

Get whether the pin is low.

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pub fn get_level(&self) -> Level

Get the pin level.

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pub async fn wait_for_high(&mut self)

Asynchronously wait until the pin is high.

This returns immediately if the pin is already high.

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pub async fn wait_for_low(&mut self)

Asynchronously wait until the pin is low.

This returns immediately if the pin is already low.

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pub async fn wait_for_rising_edge(&mut self)

Asynchronously wait until the pin sees a rising edge.

If the pin is already high, it will wait for it to go low then back high.

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pub async fn wait_for_falling_edge(&mut self)

Asynchronously wait until the pin sees a falling edge.

If the pin is already low, it will wait for it to go high then back low.

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pub async fn wait_for_any_edge(&mut self)

Asynchronously wait until the pin sees any edge (either rising or falling).

Trait Implementations§

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impl<'d> ErrorType for ExtiInput<'d>

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type Error = Infallible

Error type
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impl<'d> InputPin for ExtiInput<'d>

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type Error = Infallible

Error type
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fn is_high(&self) -> Result<bool, Self::Error>

Is the input pin high?
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fn is_low(&self) -> Result<bool, Self::Error>

Is the input pin low?
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impl<'d> InputPin for ExtiInput<'d>

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fn is_high(&mut self) -> Result<bool, Self::Error>

Is the input pin high?
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fn is_low(&mut self) -> Result<bool, Self::Error>

Is the input pin low?
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impl<'d> Wait for ExtiInput<'d>

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async fn wait_for_high(&mut self) -> Result<(), Self::Error>

Wait until the pin is high. If it is already high, return immediately. Read more
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async fn wait_for_low(&mut self) -> Result<(), Self::Error>

Wait until the pin is low. If it is already low, return immediately. Read more
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async fn wait_for_rising_edge(&mut self) -> Result<(), Self::Error>

Wait for the pin to undergo a transition from low to high. Read more
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async fn wait_for_falling_edge(&mut self) -> Result<(), Self::Error>

Wait for the pin to undergo a transition from high to low. Read more
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async fn wait_for_any_edge(&mut self) -> Result<(), Self::Error>

Wait for the pin to undergo any transition, i.e low to high OR high to low.
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impl<'d> Unpin for ExtiInput<'d>

Auto Trait Implementations§

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impl<'d> Freeze for ExtiInput<'d>

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impl<'d> RefUnwindSafe for ExtiInput<'d>

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impl<'d> Send for ExtiInput<'d>

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impl<'d> Sync for ExtiInput<'d>

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impl<'d> !UnwindSafe for ExtiInput<'d>

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.