com.diozero.internal.provider.pi4j.Pi4jDigitalOutputDevice Maven / Gradle / Ivy

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package com.diozero.internal.provider.pi4j;

/*
 * #%L
 * Organisation: mattjlewis
 * Project:      Device I/O Zero - pi4j provider
 * Filename:     Pi4jDigitalOutputDevice.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 - 2017 mattjlewis
 * %%
 * 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 org.pmw.tinylog.Logger;

import com.diozero.internal.provider.AbstractDevice;
import com.diozero.internal.provider.DeviceFactoryInterface;
import com.diozero.internal.provider.GpioDigitalOutputDeviceInterface;
import com.diozero.util.RuntimeIOException;
import com.pi4j.io.gpio.*;

public class Pi4jDigitalOutputDevice extends AbstractDevice implements GpioDigitalOutputDeviceInterface {
	private GpioPinDigitalOutput digitalOutputPin;
	private int gpio;

	Pi4jDigitalOutputDevice(String key, DeviceFactoryInterface deviceFactory, GpioController gpioController, int gpio, boolean initialValue) {
		super(key, deviceFactory);
		
		Pin pin = RaspiBcmPin.getPinByAddress(gpio);
		if (pin == null) {
			throw new IllegalArgumentException("Illegal GPIO: " + gpio);
		}
		
		this.gpio = gpio;
		
		digitalOutputPin = gpioController.provisionDigitalOutputPin(pin, "Digital output for BCM GPIO " + gpio,
				PinState.getState(initialValue));
	}

	@Override
	protected void closeDevice() {
		Logger.debug("closeDevice()");
		digitalOutputPin.setState(false);
		digitalOutputPin.unexport();
		GpioFactory.getInstance().unprovisionPin(digitalOutputPin);
	}

	@Override
	public boolean getValue() throws RuntimeIOException {
		return digitalOutputPin.getState().isHigh();
	}

	@Override
	public void setValue(boolean value) throws RuntimeIOException {
		digitalOutputPin.setState(value);
	}

	@Override
	public int getGpio() {
		return gpio;
	}
}