SerialPortConnector.java

/**
 * Copyright (c) 2010-2016 by the respective copyright holders.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 */
package org.openhab.binding.stiebelheatpump.protocol;

import java.io.DataOutputStream;
import java.io.IOException;

import gnu.io.CommPort;
import gnu.io.CommPortIdentifier;
import gnu.io.SerialPort;
import gnu.io.UnsupportedCommOperationException;

public class SerialPortConnector extends SerialConnector {
    private String device;
    private int baudrate;
    SerialPort serialPort = null;

    public SerialPortConnector(String device, int baudrate) {
        this.device = device;
        this.baudrate = baudrate;
    }

    @Override
    protected void connectPort() throws Exception {
        CommPortIdentifier portIdentifier = CommPortIdentifier.getPortIdentifier(device);

        CommPort commPort = portIdentifier.open(this.getClass().getName(), 2000);

        serialPort = (SerialPort) commPort;
        setSerialPortParameters(baudrate);

        in = serialPort.getInputStream();
        out = new DataOutputStream(serialPort.getOutputStream());
    }

    @Override
    protected void disconnectPort() {
        serialPort.close();
    }

    /**
     * Sets the serial port parameters to xxxxbps-8N1
     * 
     * @param baudrate
     *            used to initialize the serial connection
     */
    protected void setSerialPortParameters(int baudrate) throws IOException {

        try {
            // Set serial port to xxxbps-8N1
            serialPort.setSerialPortParams(baudrate, SerialPort.DATABITS_8, SerialPort.STOPBITS_1,
                    SerialPort.PARITY_NONE);
        } catch (UnsupportedCommOperationException ex) {
            throw new IOException("Unsupported serial port parameter for serial port");
        }
    }
}