SerialInterface.java 文件源码

private void openPort(String id) {
    System.out.printf("opening port %s @ %d bauds\n", id, this.baudRate);
    try {
        CommPortIdentifier portId = CommPortIdentifier.getPortIdentifier(id);
        if (portId.isCurrentlyOwned()) {
            System.err.printf("error: %s port currently in use\n", id);
            return;
        }
        CommPort commPort = portId.open(this.getClass().getName(), 5000);
        if (commPort instanceof SerialPort) {
            this.port = (SerialPort) commPort;
            this.port.setSerialPortParams(this.baudRate, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
            this.portOut = this.port.getOutputStream();
        } else {
            System.err.printf("error: port %s is not serial\n", id);
            return;
        }
    } catch (Exception e) {
        System.err.printf("error: cannot find/open port %s\n", id);
        System.err.printf("%s\n", e.getMessage());
    }
}