WirelessLCDSystem.java 文件源码

private void startRS232Com() throws NoSuchPortException,
        PortInUseException,
        UnsupportedCommOperationException,
        IOException,
        TooManyListenersException {
    // get the port identifer
    String portName = comListStr[comList.getSelectedIndex()];
    portIdentifier = CommPortIdentifier.getPortIdentifier(portName);
    if (portIdentifier.isCurrentlyOwned()) {
        System.out.println("Error: Port is currently in use");
    } else {
        // Wait for 2ms when the COM is Busy
        String baudrate = baudrateListStr[baudrateList.getSelectedIndex()];
        CommPort comPort = portIdentifier.open(this.getClass().getName(), 2000);

        if (comPort instanceof SerialPort) {
            serialPort = (SerialPort) comPort;
            // set the notify on data available

            // serialPort.addEventListener(this);

            // use state machine here
            // so do not use the interrupt now
            // first time must open this notify

            //serialPort.notifyOnDataAvailable(true); 

            // set params
            serialPort.setSerialPortParams(
                    Integer.parseInt(baudrate),
                    SerialPort.DATABITS_8,
                    SerialPort.STOPBITS_1,
                    SerialPort.PARITY_NONE);
            // Do not use flow control
            serialPort.setFlowControlMode(SerialPort.FLOWCONTROL_NONE);

            // set the out/in stream
            serialIn = serialPort.getInputStream();
            serialOut = serialPort.getOutputStream();

            // initialize the read thread here
            // do not need initialize the thread here
            // first time do not initialize this thread
            if(null == serialReadThread){
                serialReadThread = new Thread(new SerialReader(serialIn));
                // start the thread
                serialReadThread.start();
            }

        } else {
            System.out.println(
                    "Error: Only serial ports are handled by this example.");
        }
    }
}