Struct LedEngine 

pub struct LedEngine { /* private fields */ }

LED sequence engine.

Implementations

impl LedEngine

pub fn new(timings: LedTimings, start_ms: u64) -> Self

Create a new engine anchored at start_ms. The first heartbeat pulse begins at start_ms.

pub fn attention_only(start_ms: u64) -> Self

An engine for an indicator that idles dark: no heartbeat, only the locate alert and one-shot sequences.

For a board with two LEDs, where one carries the “this board is alive and here is its link state” story and the other is reserved for the things meant to catch an eye. A second heartbeat would only compete with the first.

Implemented as a zero-length heartbeat pulse, which heartbeat_decision resolves to permanently off. The interval then only sets how often the loop wakes to find nothing to do, so it is long.

pub fn start_alert(&mut self, now_ms: u64)

Start the locate alert. Idempotent: re-starting a running alert keeps its existing rhythm rather than restarting the blink, so a host re-arming the deadline does not produce a visible stutter.

pub fn stop_alert(&mut self)

Stop the locate alert, returning the LED to sequences and the heartbeat.

pub fn alert_active(&self) -> bool

Whether the locate alert is running.

pub fn play(&mut self, seq: LedSequence, now_ms: u64)

Start a one-shot sequence, preempting any currently active sequence and any in-progress heartbeat pulse.

pub fn tick(&mut self, now_ms: u64) -> LedDecision

Compute the LED state to apply at now_ms and the next deadline.

Trait Implementations

impl Debug for LedEngine

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

Formats the value using the given formatter.