com.pi4j.component.potentiometer.microchip.MCP4431 Maven / Gradle / Ivy

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package com.pi4j.component.potentiometer.microchip;

import com.pi4j.component.potentiometer.microchip.impl.MicrochipPotentiometerBase;
import com.pi4j.io.i2c.I2CBus;

import java.io.IOException;

/*
 * #%L
 * **********************************************************************
 * ORGANIZATION  :  Pi4J
 * PROJECT       :  Pi4J :: Device Abstractions
 * FILENAME      :  MCP4431.java  
 * 
 * This file is part of the Pi4J project. More information about 
 * this project can be found here:  http://www.pi4j.com/
 * **********************************************************************
 * %%
 * Copyright (C) 2012 - 2015 Pi4J
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Lesser Public License for more details.
 * 
 * You should have received a copy of the GNU General Lesser Public
 * License along with this program.  If not, see
 * .
 * #L%
 */

/**
 * Pi4J-device for MCP4431.
 * 
 * @author Raspelikan
 */
public class MCP4431 extends MicrochipPotentiometerBase implements MicrochipPotentiometer {

	private static final MicrochipPotentiometerChannel[] supportedChannels = new MicrochipPotentiometerChannel[] {
		MicrochipPotentiometerChannel.A, MicrochipPotentiometerChannel.B, MicrochipPotentiometerChannel.C, MicrochipPotentiometerChannel.D
	};
	
	/**
	 * Builds an instance which is ready to use.
	 * 
	 * @param i2cBus The Pi4J-I2CBus to which the device is connected to
	 * @param pinA0 Whether the device's address pin A0 is high (true) or low (false)
	 * @param initialValue Initial value of wiper
	 * @throws IOException Thrown if communication fails or device returned a malformed result
	 */
	public MCP4431(final I2CBus i2cBus, final boolean pinA0,
                   final int initialValue) throws IOException {
		
		super(i2cBus, pinA0, PIN_NOT_AVAILABLE, PIN_NOT_AVAILABLE,
				MicrochipPotentiometerChannel.A, MicrochipPotentiometerNonVolatileMode.VOLATILE_ONLY, initialValue);
		
	}
	
	/**
	 * @return Whether device is capable of non volatile wipers (false for MCP4431)
	 */
	@Override
	public boolean isCapableOfNonVolatileWiper() {
		
		return false;
		
	}
	
	/**
	 * @return The maximal value at which a wiper can be (128 for MCP4431)
	 */
	@Override
	public int getMaxValue() {
		
		return maxValue();
		
	}
	
	/**
	 * @return The maximal value at which a wiper can be (128 for MCP4431)
	 */
	public static int maxValue() {
		
		return 128;
		
	}

	/**
	 * @return Whether this device is a potentiometer or a rheostat (false for MCP4431)
	 */
	@Override
	public boolean isRheostat() {
		
		return false;
		
	}
	
	/**
	 * @return All channels supported by the underlying device (A, B, C and D for MCP4431)
	 */
	@Override
	public MicrochipPotentiometerChannel[] getSupportedChannelsByDevice() {
		
		return supportedChannels;
		
	}
	
}