通过java中的串口从输入流中读取字节

Question

我有一个要通过串行端口发送的字节流。发送完所有字节后，我应该再次通过输入流接收字节流。

输出字节数组

byte[] command={(byte) 0xAA,0x55,0x05,0x00,0x55,(byte) 0xAA};

预期响应

**Serial command received
Admin Mode - IR Learn
In IR Learner Mode
Press IR Key...**

实际反应

**Serial command received
Admin Mode - IR Learn
In IR e - IR**

输入流

public void serialEvent(SerialPortEvent event) {
    try {

        Thread.sleep(100);

    } catch (InterruptedException e2) {
        e2.printStackTrace();
    }
    StringBuilder sb = new StringBuilder();

    try {
        int length = inputStream.available();
        readBuffer = new byte[length];

        Thread.sleep(110);


        while (inputStream.available() > 0) {
            int numBytes = inputStream.read(readBuffer);

            for (byte b : readBuffer) {

                sb.append(new String(new byte[]{b}));
            }
        }
        System.out.println(sb.toString());

        JOptionPane.showMessageDialog(contentPane, "Learned code : " + sb.toString(), "Code", JOptionPane.INFORMATION_MESSAGE);

    } catch (IOException e4) {
        e4.printStackTrace();
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
    readBuffer = null;
}

输出流

for (int i = 0; i < command.length; i++) {
    outputStream.write(command, 0, command.length);
    outputStream.flush();
}

如何在不重复和JOptionPane的情况下获取值？

请帮忙

Answer 1

1. 摆脱所有的睡眠。

2. 您将垃圾添加到StringBuffer. 更改此：

   while (inputStream.available() > 0) 
   {
       int numBytes = inputStream.read(readBuffer);
       for (byte b:readBuffer)
       {
           sb.append(new String(new byte[] {b}));                                               
       }
   }
   

   到这里：

   while (inputStream.available() > 0) 
   {
       int numBytes = inputStream.read(readBuffer);
       if (numBytes < 0)
           break;
       sb.append(new String(readBuffer, 0, numBytes));
   }
   

3. 在输出端，您要多次编写每个命令。改变这个：

   for(int i=0;i<command.length;i++)
   {
       outputStream.write(command,0,command.length);
       outputStream.flush();
   }
   

   到这里：

   outputStream.write(command,0,command.length);
   outputStream.flush();