[−][src]Trait embedded_hal::Qei
Quadrature encoder interface
This trait is available if embedded-hal is built with the "unproven"
feature.
Examples
You can use this interface to measure the speed of a motor
extern crate embedded_hal as hal; #[macro_use(block)] extern crate nb; use hal::prelude::*; fn main() { let mut qei: Qei1 = { // .. }; let mut timer: Timer6 = { // .. }; let before = qei.count(); timer.start(1.s()); block!(timer.wait()); let after = qei.count(); let speed = after.wrapping_sub(before); println!("Speed: {} pulses per second", speed); }
Associated Types
type Count
The type of the value returned by count
Required Methods
fn count(&self) -> Self::Count
Returns the current pulse count of the encoder
fn direction(&self) -> Direction
Returns the count direction