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Pi4J wrapper for the PIGPIO library
There is a newer version: 2.7.0
package com.pi4j.library.pigpio.test;
/*-
 * #%L
 * **********************************************************************
 * ORGANIZATION  :  Pi4J
 * PROJECT       :  Pi4J :: LIBRARY  :: JNI Wrapper for PIGPIO Library
 * FILENAME      :  TestPwmHardware.java
 *
 * This file is part of the Pi4J project. More information about
 * this project can be found here:  https://pi4j.com/
 * **********************************************************************
 *
 * 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%
 */

import com.pi4j.library.pigpio.PiGpio;
import com.pi4j.library.pigpio.PiGpioMode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.slf4j.event.Level;

import java.io.IOException;

/**
 * Main class.
 *
 * @author Robert Savage (http://www.savagehomeautomation.com)
 * @version $Id: $Id
 */
public class TestPwmHardware {

    private static final Logger logger = LoggerFactory.getLogger(TestPwmHardware.class);

    public static int GPIO_PIN = 21;

    /**
     * main.
     *
     * @param args an array of {@link String} objects.
     * @throws IOException
     */
    public static void main(String[] args) throws IOException {
        String loglevel = "INFO";
        if(args != null && args.length > 0){
            Level lvl = Level.valueOf(args[0].toUpperCase());
            loglevel = lvl.name();
        }
        System.setProperty("org.slf4j.simpleLogger.defaultLogLevel", loglevel);

        logger.info("");
        logger.info("");
        PiGpio piGpio = PiGpio.newNativeInstance();

        piGpio.gpioInitialise();
        logger.info("-----------------------------------------------------");
        logger.info("PIGPIO INITIALIZED SUCCESSFULLY");
        logger.info("-----------------------------------------------------");

        logger.info("PIGPIO VERSION   : {}", piGpio.gpioVersion());
        logger.info("PIGPIO HARDWARE  : {}", piGpio.gpioHardwareRevision());

        // set pin ALT modes for PWM
        piGpio.gpioSetMode(19, PiGpioMode.ALT5);

        piGpio.gpioHardwarePWM(19, 1000, 500000);
        System.in.read();
        piGpio.gpioHardwarePWM(19, 0, 500000);

        logger.info("-----------------------------------------------------");
        piGpio.gpioTerminate();
        logger.info("PIGPIO TERMINATED");

        logger.info("-----------------------------------------------------");
        logger.info("");
        logger.info("");
    }
}