Struct Qdec

pub struct Qdec<'d, T: Instance> { /* private fields */ }

Quadrature decoder driver.

Implementations

impl<'d, T: Instance> Qdec<'d, T>

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

Create a new QDEC.

pub fn new_with_led( qdec: impl Peripheral<P = T> + 'd, _irq: impl Binding<T::Interrupt, InterruptHandler<T>> + 'd, a: impl Peripheral<P = impl GpioPin> + 'd, b: impl Peripheral<P = impl GpioPin> + 'd, led: impl Peripheral<P = impl GpioPin> + 'd, 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.

If the future is dropped, the read is cancelled.

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;