Question

我一直在测试和处理我的RFID扫描仪代码，我发现了一些奇怪的东西。当我点击该卡时，有些情况会导致结果被截断。

示例：

点按1： [2] 1000007 ，000242985

点按2： 7 [3] [2] 1,000,0 07,0002429

点按3： 857 [3] [2] 1000 ，007,00024

点击n：等

预期产出： [2]R,AAA,TTT,NNNNNNNNNN[3]

R = if the ID is registered or not: flags 1 and 0
A = The address where the ID is located inside the scanner's memory
T = the type of card
N = the ID number

如果我理解正确，传输开始和结束时使用ASCII字符2和3.所以看起来我得到的结果是不完整的。我该如何解决这个问题？

这是我的完整代码：

import jssc.SerialPort; 
import jssc.SerialPortEvent; 
import jssc.SerialPortEventListener; 
import jssc.SerialPortException;

public class ComControl{
    static SerialPort serialPort;
    String[] collector;

    public static void main(String[] args) {
        serialPort = new SerialPort("COM6"); 
        try {
            serialPort.openPort();//Open serial port
            serialPort.setParams(SerialPort.BAUDRATE_9600,SerialPort.DATABITS_8,SerialPort.STOPBITS_1,SerialPort.PARITY_NONE);//Set params. Also you can set params by this string: serialPort.setParams(9600, 8, 1, 0);
            serialPort.writeBytes("\002v0\003".getBytes());//Write data to port
            serialPort.closePort();//Close serial port
        }
        catch (SerialPortException ex) {
            System.out.println(ex);
        }
        try {
            serialPort.openPort();//Open port
            serialPort.setParams(9600, 8, 1, 0);//Set params
            int mask = SerialPort.MASK_RXCHAR + SerialPort.MASK_CTS + SerialPort.MASK_DSR;//Prepare mask
            serialPort.setEventsMask(mask);//Set mask
            serialPort.addEventListener(new SerialPortReader());//Add SerialPortEventListener
        }
        catch (SerialPortException ex) {
            System.out.println(ex);
        }
    }
    static class SerialPortReader implements SerialPortEventListener {
        @Override
        public void serialEvent(SerialPortEvent event) {
            try{

            }catch(Exception e){
                System.out.println(e);
            }

            if(event.isRXCHAR()){//If data is available
                if(event.getEventValue() == 10){//Check bytes count in the input buffer
                    //Read data, if 10 bytes available
                    String sizer="";
                    try{
                        sizer="";
                        sizer += serialPort.readString();

                    }catch (SerialPortException ex) {
                        System.out.println(ex);
                    }
                    System.out.println(sizer);
                    sizer = "";
                }
            }
//            else if(event.isCTS()){//If CTS line has changed state
//                if(event.getEventValue() == 1){//If line is ON
//                    System.out.println("CTS - ON");
//                }
//                else {
//                    System.out.println("CTS - OFF");
//                }
//            }
//            else if(event.isDSR()){///If DSR line has changed state
//                if(event.getEventValue() == 1){//If line is ON
//                    System.out.println("DSR - ON");
//                }
//                else {
//                    System.out.println("DSR - OFF");
//                }
//            }
        }
    }
}

以下是有关我正在使用的设备的信息： Low Cost RFID Reader - e-Gizmo

Answer 1

没关系，我得到了答案。当它实际上是22个字节时，我愚蠢到可以放10个字节。

RFID - 输出不完整？

1 个答案: