package com.intelligt.modbus.jlibmodbus.serial;
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import com.intelligt.modbus.jlibmodbus.Modbus;
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import purejavacomm.*;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.util.concurrent.atomic.AtomicBoolean;
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/*
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* Copyright (C) 2017 Vladislav Y. Kochedykov
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*
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* [http://jlibmodbus.sourceforge.net]
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*
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* This file is part of JLibModbus.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Authors: Vladislav Y. Kochedykov, software engineer.
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* email: vladislav.kochedykov@gmail.com
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*/
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public class SerialPortPJC extends SerialPort implements SerialPortEventListener {
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private purejavacomm.SerialPort port;
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final private AtomicBoolean opened = new AtomicBoolean(false);
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private InputStream in;
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private OutputStream out;
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public SerialPortPJC(SerialParameters sp) {
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super(sp);
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}
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@Override
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public void write(int b) throws IOException {
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if (!isOpened()) {
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throw new IOException("Port not opened");
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}
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try {
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out.write((byte) b);
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} catch (Exception e) {
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throw new IOException(e);
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}
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}
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@Override
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public void write(byte[] bytes) throws IOException {
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if (!isOpened()) {
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throw new IOException("Port not opened");
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}
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try {
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out.write(bytes);
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} catch (Exception e) {
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throw new IOException(e);
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}
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}
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@Override
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public void open() throws SerialPortException {
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try {
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SerialParameters sp = getSerialParameters();
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CommPortIdentifier portIdentifier;
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portIdentifier = CommPortIdentifier.getPortIdentifier(sp.getDevice());
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if (portIdentifier.isCurrentlyOwned()) {
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String msg = "Cannot open serial port " + sp.getDevice();
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Modbus.log().warning(msg);
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throw new SerialPortException(msg);
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} else {
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CommPort commPort = portIdentifier.open(this.getClass().getName(), Modbus.MAX_CONNECTION_TIMEOUT);
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if (commPort instanceof purejavacomm.SerialPort) {
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port = (purejavacomm.SerialPort) commPort;
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port.setSerialPortParams(sp.getBaudRate(), sp.getDataBits(), sp.getStopBits(), sp.getParity().getValue());
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port.setFlowControlMode(gnu.io.SerialPort.FLOWCONTROL_NONE);
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in = port.getInputStream();
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out = port.getOutputStream();
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port.enableReceiveTimeout(getReadTimeout());
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setOpened(true);
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} else {
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Modbus.log().severe(sp.getDevice() + " is not a serial port.");
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}
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}
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} catch (NoSuchPortException e) {
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throw new SerialPortException(e);
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} catch (Exception ex) {
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throw new SerialPortException(ex);
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}
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}
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@Override
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public void setReadTimeout(int readTimeout) {
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super.setReadTimeout(readTimeout);
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try {
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if (isOpened())
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port.enableReceiveTimeout(readTimeout);
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} catch (UnsupportedCommOperationException e) {
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Modbus.log().warning(e.getLocalizedMessage());
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}
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}
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@Override
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public int read() throws IOException {
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if (!isOpened()) {
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throw new IOException("Port not opened");
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}
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int c;
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try {
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c = in.read();
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} catch (Exception e) {
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throw new IOException(e);
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}
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if (c > -1)
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return c;
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else
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throw new IOException("Read timeout");
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}
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@Override
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public int read(byte[] b, int off, int len) throws IOException {
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if (!isOpened()) {
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throw new IOException("Port not opened");
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}
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int c;
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try {
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c = in.read(b, off, len);
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} catch (Exception e) {
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throw new IOException(e);
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}
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if (c > -1)
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return c;
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else
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throw new IOException("Read timeout");
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}
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@Override
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public void close() {
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try {
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if (isOpened()) {
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setOpened(false);
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in.close();
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out.close();
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port.close();
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}
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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@Override
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public boolean isOpened() {
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return opened.get();
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}
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public void setOpened(boolean opened) {
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this.opened.set(opened);
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}
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@Override
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public void serialEvent(SerialPortEvent serialPortEvent) {
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switch (serialPortEvent.getEventType()) {
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case SerialPortEvent.OE:
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case SerialPortEvent.PE:
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case SerialPortEvent.FE:
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Modbus.log().warning(port.getName() + ": framing error.");
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break;
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default:
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break;
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}
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}
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}
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