001package com.pi4j.wiringpi;
002
003/*
004 * #%L
005 * **********************************************************************
006 * ORGANIZATION  :  Pi4J
007 * PROJECT       :  Pi4J :: Java Library (Core)
008 * FILENAME      :  Nes.java
009 *
010 * This file is part of the Pi4J project. More information about
011 * this project can be found here:  https://www.pi4j.com/
012 * **********************************************************************
013 * %%
014 * Copyright (C) 2012 - 2019 Pi4J
015 * %%
016 * This program is free software: you can redistribute it and/or modify
017 * it under the terms of the GNU Lesser General Public License as
018 * published by the Free Software Foundation, either version 3 of the
019 * License, or (at your option) any later version.
020 *
021 * This program is distributed in the hope that it will be useful,
022 * but WITHOUT ANY WARRANTY; without even the implied warranty of
023 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
024 * GNU General Lesser Public License for more details.
025 *
026 * You should have received a copy of the GNU General Lesser Public
027 * License along with this program.  If not, see
028 * <http://www.gnu.org/licenses/lgpl-3.0.html>.
029 * #L%
030 */
031
032
033import com.pi4j.util.NativeLibraryLoader;
034
035/**
036 * <p>
037 * Before using the Pi4J library, you need to ensure that the Java VM in configured with access to
038 * the following system libraries:
039 * <ul>
040 * <li>pi4j</li>
041 * <li>wiringPi</li>
042 * </ul>
043 * <blockquote> This library depends on the wiringPi native system library.</br> (developed by
044 * Gordon Henderson @ <a href="http://wiringpi.com/">http://wiringpi.com/</a>)
045 * </blockquote>
046 * </p>
047 *
048 * @see <a href="https://www.pi4j.com/">https://www.pi4j.com/</a>
049 * @see <a
050 *      href="http://wiringpi.com/dev-lib/">http://wiringpi.com/dev-lib/</a>
051 * @author Robert Savage (<a
052 *         href="http://www.savagehomeautomation.com">http://www.savagehomeautomation.com</a>)
053 */
054public class Nes {
055
056    public static final int NES_RIGHT = 0x01;
057    public static final int NES_LEFT = 0x02;
058    public static final int NES_DOWN = 0x04;
059    public static final int NES_UP = 0x08;
060    public static final int NES_START = 0x10;
061    public static final int NES_SELECT = 0x20;
062    public static final int NES_B = 0x40;
063    public static final int NES_A = 0x80;
064    public static final int PULSE_TIME = 25;
065    public static final int MAX_NES_JOYSTICKS = 8;
066
067    // private constructor
068    private Nes() {
069        // forbid object construction
070    }
071
072    static {
073        // Load the platform library
074        NativeLibraryLoader.load("libpi4j.so");
075    }
076
077    /**
078     * <p>setupNesJoystick:</p>
079     *
080     * <p>Create a new NES joystick interface, program the pins, etc.</p>
081     *
082     * @param dPin data pin
083     * @param cPin clock pin
084     * @param lPin pin number
085     * @return return joystick handle
086     */
087    public static native int setupNesJoystick(int dPin, int cPin, int lPin);
088
089    /**
090     * <p>readNesJoystick:</p>
091     *
092     * <p>Do a single scan of the NES Joystick.</p>
093     *
094     * @param joystick joystick handle
095     * @return return value
096     */
097    public static native int readNesJoystick(int joystick);
098}