Struct Debouncer 

pub struct Debouncer {
    stable: bool,
    candidate: bool,
    count: u8,
}

Software debouncer state.

Holds the last stable level and a running counter that increments while the raw input matches the candidate new level and resets when it does not. Once the counter reaches DEBOUNCE_STABLE_SAMPLES the candidate becomes the new stable level.

Fields

stable: bool

Currently-accepted stable level.

candidate: bool

Candidate level being observed.

count: u8

Consecutive samples matching candidate.

Implementations

impl Debouncer

pub const fn new(initial: bool) -> Self

Build a fresh debouncer assuming the initial level is initial.

pub fn sample(&mut self, level: bool) -> Option<bool>

Feed one new sample.

Returns Some(level) when the stable level just changed as a result of this sample, None otherwise. The caller can use this as a trigger to issue a press/release event.

pub const fn stable(&self) -> bool

Current stable level (without consuming a sample).

Useful for diagnostics: a task can query the current stable state without committing to a sampling cycle. The touch_task logs this at startup so the developer can confirm the resting state of the button line via defmt RTT or USB CDC trace.

Trait Implementations

impl Clone for Debouncer

fn clone(&self) -> Debouncer

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Debouncer

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for Debouncer

fn eq(&self, other: &Debouncer) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for Debouncer

impl Eq for Debouncer

impl StructuralPartialEq for Debouncer