打开和关闭串行端口 [英] Open and Close Serial Ports

问题描述

我正在尝试连接到串行端口 ...但是一旦我打开<第一次code>串口。我无法再打开它，我试图申请。这是我的代码：

I am trying to connect to a Serial Port ... but once I open the Serial Port in the first time. I can't open it again, I've tried to apply. Here is my code:

public static void main(String[] args) {
    portList = CommPortIdentifier.getPortIdentifiers();
    while (portList.hasMoreElements()) {
        portId = (CommPortIdentifier) portList.nextElement();
        if (portId.getPortType() == CommPortIdentifier.PORT_SERIAL) {
             if (portId.getName().equals("COM1")) {
                try {
                    serialPort = (SerialPort)
                        portId.open("SimpleWriteApp", 2000);
                } catch (PortInUseException e) {}
                try {
                    outputStream = serialPort.getOutputStream();
                } catch (IOException e) {}
                try {
                    serialPort.setSerialPortParams(9600,
                        SerialPort.DATABITS_8,
                        SerialPort.STOPBITS_1,
                        SerialPort.PARITY_NONE);
                } catch (UnsupportedCommOperationException e) {}
                try {
                    outputStream.write(messageString.getBytes());
                } catch (IOException e) {}
            }
        }
    }
}

我想关闭该端口，以便将其用于其他任务。

I want to close that port so I can use it for another task.

推荐答案

根据java Communication API，您只需 close（）你的串口对象：

According to the java Communication API you just have to close() your serial port object:

serialPort.close();

close（）方法来自 SerialPort 超级 CommPort 。

The close() method comes from the SerialPort super class CommPort.

这篇关于打开和关闭串行端口的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！