Struct CountDown 

pub struct CountDown { /* private fields */ }

Implementation of the embedded_hal_0_2::timer traits using rp2040_hal::timer counter.

There is no Embedded HAL 1.0 equivalent at this time.

If all you need is a delay, Timer does implement embedded_hal::delay::DelayNs.

Usage

use embedded_hal_0_2::timer::{CountDown, Cancel};
use fugit::ExtU32;
use rp2040_hal;
let mut pac = rp2040_hal::pac::Peripherals::take().unwrap();
// Make sure to initialize clocks, otherwise the timer wouldn't work
// properly. Omitted here for terseness.
let clocks: rp2040_hal::clocks::ClocksManager = todo!();
// Configure the Timer peripheral in count-down mode
let timer = rp2040_hal::Timer::new(pac.TIMER, &mut pac.RESETS, &clocks);
let mut count_down = timer.count_down();
// Create a count_down timer for 500 milliseconds
count_down.start(500.millis());
// Block until timer has elapsed
let _ = nb::block!(count_down.wait());
// Restart the count_down timer with a period of 100 milliseconds
count_down.start(100.millis());
// Cancel it immediately
count_down.cancel();

Trait Implementations

impl Cancel for CountDown

type Error = &'static str

Error returned when a countdown can’t be canceled.

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

Tries to cancel this countdown.

impl CountDown for CountDown

type Time = Duration<u64, 1, 1000000>

The unit of time used by this timer

fn start<T>(&mut self, count: T)

where T: Into<Self::Time>,

Starts a new count down

fn wait(&mut self) -> Result<(), Void>

Non-blockingly “waits” until the count down finishes

impl Periodic for CountDown