PulseIn

[1995parham]

What kind of new feature are you looking for?

• Software: PulseIn is a function for detecting the duration of high or low signal over input pin. it also exists on Arduino library and can be defined as follow:

func PulseIn(pin gpio.PinIn, lvl gpio.Level, t time.Duration) (time.Duration, error) {
    var e1, e2 gpio.Edge

    if lvl == gpio.High {
        e1 = gpio.RisingEdge
        e2 = gpio.FallingEdge
    } else {
        e1 = gpio.FallingEdge
        e2 = gpio.RisingEdge
    }

    if err := pin.In(gpio.PullNoChange, e1); err != nil {
        return 0, fmt.Errorf("pin %s in setup failed %w", pin, err)
    }

    pin.WaitForEdge(t)

    now := time.Now()

    if err := pin.In(gpio.PullNoChange, e2); err != nil {
        return 0, fmt.Errorf("pin %s in setup failed %w", pin, err)
    }

    pin.WaitForEdge(t)

    return time.Since(now), nil
}

Do you plan to:

• Contribute an initial package: Yes
• Write unit tests: Yes

if you agree with the function existence in gpioutil I can contribute and add it.

[maruel]

Ok. No need to wrap the error, you can return the pin.In() error as-is.

[1995parham]

Thanks for the point, so I will create a PR for this.