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package com.diozero.devices.sandpit;
/*
* #%L
* Organisation: diozero
* Project: Device I/O Zero - Core
* Filename: DebouncedDigitalInputDevice.java
*
* This file is part of the diozero project. More information about this project
* can be found at http://www.diozero.com/
* %%
* Copyright (C) 2016 - 2020 diozero
* %%
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
* #L%
*/
import com.diozero.api.GpioEventTrigger;
import com.diozero.api.GpioPullUpDown;
import com.diozero.api.WaitableDigitalInputDevice;
import com.diozero.util.RuntimeIOException;
/**
* Represents a generic input device with typical on/off behaviour.
*
* This class extends 'WaitableInputDevice' with machinery to fire the active
* and inactive events for devices that operate in a typical digital manner:
* straight forward on / off states with (reasonably) clean transitions between
* the two.
*/
public class DebouncedDigitalInputDevice extends WaitableDigitalInputDevice {
public DebouncedDigitalInputDevice(int gpio) throws RuntimeIOException {
this(gpio, GpioPullUpDown.NONE, 0, GpioEventTrigger.BOTH);
}
/**
*
* @param gpio GPIO
* @param pud Pull-up/down configuratoin
* @param debounceTime
* Specifies the length of time (in seconds) that the component
* will ignore changes in state after an initial change. This
* defaults to 0 which indicates that no bounce compensation will
* be performed.
* @throws RuntimeIOException if an I/O error occurs
*/
public DebouncedDigitalInputDevice(int gpio, GpioPullUpDown pud, float debounceTime) throws RuntimeIOException {
this(gpio, pud, debounceTime, GpioEventTrigger.BOTH);
}
public DebouncedDigitalInputDevice(int gpio, GpioPullUpDown pud, float debounceTime, GpioEventTrigger trigger) throws RuntimeIOException {
super(gpio, pud, trigger);
if (debounceTime > 0) {
device.setDebounceTimeMillis(Math.round(debounceTime * 1000));
}
}
// Exposed operations
public void setDebounceTime(float debounceTime) {
device.setDebounceTimeMillis(Math.round(debounceTime * 1000));
}
}
