RtuTransportRxtx.java 文件源码

@Override
synchronized protected void openPort() throws NoSuchPortException, PortInUseException, UnsupportedCommOperationException {
    if (port != null)
        return;
    log.info("Opening port: " + portName);
    CommPortIdentifier ident = CommPortIdentifier.getPortIdentifier(portName);
    port = ident.open("ModbusRtuClient on " + portName, 2000);
    port.setOutputBufferSize(buffer.length);
    port.setInputBufferSize(buffer.length);
    try {
        port.setSerialPortParams(baudRate, dataBits, stopBits, parity);             
        port.enableReceiveTimeout(timeout);
        port.setFlowControlMode(SerialPort.FLOWCONTROL_NONE);
    } catch (UnsupportedCommOperationException e) {
        close();
        throw e;
    }
    log.info("Port opened: " + port.getName());
}