pub struct Button<'a, P: InterruptPin<'a>> { /* private fields */ }
Expand description

Manages the list of GPIO pins that are connected to buttons and which apps are listening for interrupts from which buttons.

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impl<'a, P: InterruptPin<'a>> Button<'a, P>

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pub fn new( pins: &'a [(&'a InterruptValueWrapper<'a, P>, ActivationMode, FloatingState)], grant: Grant<App, UpcallCount<1>, AllowRoCount<0>, AllowRwCount<0>> ) -> Self

Trait Implementations§

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impl<'a, P: InterruptPin<'a>> ClientWithValue for Button<'a, P>

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fn fired(&self, pin_num: u32)

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impl<'a, P: InterruptPin<'a>> SyscallDriver for Button<'a, P>

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fn command( &self, command_num: usize, data: usize, _: usize, processid: ProcessId ) -> CommandReturn

Configure interrupts and read state for buttons.

data is the index of the button in the button array as passed to Button::new().

All commands greater than zero return INVAL if an invalid button number is passed in.

command_num
  • 0: Driver existence check and get number of buttons on the board.
  • 1: Enable interrupts for a given button. This will enable both press and depress events.
  • 2: Disable interrupts for a button. No affect or reliance on registered callback.
  • 3: Read the current state of the button.
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fn allocate_grant(&self, processid: ProcessId) -> Result<(), Error>

Request to allocate a capsule’s grant for a specific process. Read more
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fn allow_userspace_readable( &self, app: ProcessId, which: usize, slice: ReadWriteProcessBuffer ) -> Result<ReadWriteProcessBuffer, (ReadWriteProcessBuffer, ErrorCode)>

System call for a process to pass a buffer (a UserspaceReadableProcessBuffer) to the kernel that the kernel can either read or write. The kernel calls this method only after it checks that the entire buffer is within memory the process can both read and write. Read more

Auto Trait Implementations§

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impl<'a, P> !RefUnwindSafe for Button<'a, P>

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impl<'a, P> !Send for Button<'a, P>

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impl<'a, P> !Sync for Button<'a, P>

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impl<'a, P> Unpin for Button<'a, P>

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impl<'a, P> !UnwindSafe for Button<'a, P>

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> SizedTypeProperties for T

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const IS_ZST: bool = _

🔬This is a nightly-only experimental API. (sized_type_properties)
true if this type requires no storage. false if its size is greater than zero. Read more
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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.