Struct Qdec 

pub struct Qdec<'d> { /* private fields */ }

Quadrature decoder driver.

Implementations

impl<'d> Qdec<'d>

pub fn new<T: Instance>( qdec: Peri<'d, T>, _irq: impl Binding<T::Interrupt, InterruptHandler<T>> + 'd, a: Peri<'d, impl GpioPin>, b: Peri<'d, impl GpioPin>, config: Config, ) -> Self

Create a new QDEC.

pub fn new_with_led<T: Instance>( qdec: Peri<'d, T>, _irq: impl Binding<T::Interrupt, InterruptHandler<T>> + 'd, a: Peri<'d, impl GpioPin>, b: Peri<'d, impl GpioPin>, led: Peri<'d, impl GpioPin>, config: Config, ) -> Self

Create a new QDEC, with a pin for LED output.

pub async fn read(&mut self) -> i16

Perform an asynchronous read of the decoder. The returned future can be awaited to obtain the number of steps accumulated since the previous read.

This method is cancel-safe: if the future is dropped before it completes, no counts are lost; they stay in the accumulator and are returned by the next read.

Example

use embassy_nrf::qdec::{self, Qdec};
use embassy_nrf::{bind_interrupts, peripherals};

bind_interrupts!(struct Irqs {
    QDEC => qdec::InterruptHandler<peripherals::QDEC>;
});

let config = qdec::Config::default();
let mut q = Qdec::new(p.QDEC, Irqs, p.P0_31, p.P0_30, config);
let delta = q.read().await;