Trait cortex_m::prelude::_embedded_hal_Qei
source · pub trait _embedded_hal_Qei {
type Count;
// Required methods
fn count(&self) -> Self::Count;
fn direction(&self) -> Direction;
}
Expand description
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);
}