Module gpio::dummy

GPIO dummy input/output

The dummy module can be used instead of a GPIO implementation tied to hardware to run unit tests or otherwise provide means to test an application when no embedded device is around.

It supports the same interface as other GPIOs and its input and output behaviour can be configured in a flexible manner.

Example

The DummyGpioIn reads values from a callback:

use std::time;
use gpio::{GpioIn, GpioValue};
use gpio::dummy::DummyGpioIn;

// a simple dummy gpio that is always `true`/`High`
let mut dg = DummyGpioIn::new(|| true);
assert_eq!(GpioValue::High, dg.read_value().unwrap());

// another example that flips every second
let mut timed_gpio = DummyGpioIn::new(|| {
    std::time::SystemTime::now()
        .duration_since(time::UNIX_EPOCH)
        .unwrap()
        .as_secs() % 2 == 0
});
println!("timed: {:?}", timed_gpio.read_value().unwrap());

Output can simple be swallowed by a dummy output port:

use gpio::{GpioOut};
use gpio::dummy::DummyGpioOut;

let mut dg = DummyGpioOut::new(|_| ());
dg.set_value(true);

Structs

DummyGpioIn	Dummy GPIO input pin
DummyGpioOut	Dummy GPIO output pin