如何使用smartcardio和Java控制ACR122上的LED？

Question

我正在尝试使用 Java 中的 smartcardio 库（JDK 8、NetBeans 7.4、Windows 10）。我尝试了许多其他库但没有成功。

卡reader (ACS ACR122U) 附带了一张SDK CDROM，但必要的.DLL 不在CD 上，所以我无法使用ACS 库。

由于我的 NFC 设备使用了 nfctools 库不支持的 EEPROM，因此我无法使用 nfctools。

我的代码如下：

package myPackage;

import java.util.List;
import javax.smartcardio.*;

public class Blog {
 public static void main(String[] args) {
  try {
   // Display the list of terminals
   TerminalFactory factory = TerminalFactory.getDefault();
   List<CardTerminal> terminals = factory.terminals().list();
   System.out.println("Terminals: " + terminals);

   // Use the first terminal
   CardTerminal terminal = terminals.get(0);

   // Connect with the card
   Card card = terminal.connect("*");
   System.out.println("card: " + card);
   CardChannel channel = card.getBasicChannel();

   // Send Red and Green LED ON command
   byte[] cmd1 = {(byte)0xFF, // Pseudo-APDU class
                        0x00, // INS
                        0x00, // P1
                        0x00, // P2
                        9,    // Lc - number of bytes in Payload
                        (byte)0xFF, // First byte of payload - LED/Buzzer cntrl
                        0x00, // INS
                        0x40, // P1
                        0x0F, // P2 - LED state control
                        0x04, // Lc
                        0x00, // 4 byte blink duration control
                        0x00, 
                        0x00, 
                        0x00 };
   CommandAPDU apdu1 = new CommandAPDU( cmd1,   // Byte array to use
                                           0,   // index to start of msg
                                           14 );// msg length
   System.out.println( "apdu1: " + apdu1.toString() );

   ResponseAPDU answer1 = channel.transmit( apdu1 );
   System.out.println("answer1: " + answer1.toString());

   // Get Firmware Version of the reader
   byte[] cmd2 = {(byte)0xFF, 0x00, 0x00, 0x00, 5, (byte)0xFF, 0x00, 0x48, 0x00, 0x00 };
   CommandAPDU apdu2 = new CommandAPDU( cmd2, 0, 10 );
   System.out.println( "apdu2: " + apdu2.toString() );
   ResponseAPDU answer2 = channel.transmit( apdu2 );
   System.out.println("answer2: " + answer2.toString());
   System.out.println();

   // Disconnect the card
   card.disconnect(false);
  } catch(CardException e) 
  {
   System.out.println("Problem: " + e.toString());
  }
 }
}

失败并出现关于 "apdu must be a least 2 bytes long" 的错误。

run:
Terminals: [PC/SC terminal ACS ACR122 0]
card: PC/SC card in ACS ACR122 0, protocol T=1, state OK
apdu1: CommmandAPDU: 14 bytes, nc=9, ne=0
Exception in thread "main" java.lang.IllegalArgumentException: apdu must be at least 2 bytes long
    at javax.smartcardio.ResponseAPDU.check(ResponseAPDU.java:73)
    at javax.smartcardio.ResponseAPDU.<init>(ResponseAPDU.java:67)
    at sun.security.smartcardio.ChannelImpl.transmit(ChannelImpl.java:91)
    at myPackage.Blog.main(Blog.java:43)
Java Result: 1
BUILD SUCCESSFUL (total time: 0 seconds)

对象 apdu1 的长度为 14 个字节，因此我不确定错误消息的含义。

第 43 行是 ResponseAPDU answer1 = channel.transmit( apdu1 );

Answer 1

如注释0xff class of APDU command is not valid for card, this is used to get reader 解释APDU而不是发送给卡

不一样reader但是这张图清楚了

所以不要试图通过复制 INS、P1、P2 和 Lc 字段将一个 APDU 包装在另一个 APDU 中

// Send Red and Green LED ON command
   byte[] cmd1 = {(byte)0xFF, // First byte of payload - LED/Buzzer cntrl
                        0x00, // INS
                        0x40, // P1
                        0x0F, // P2 - LED state control
                        0x04, // Lc
                        0x00, // 4 byte blink duration control
                        0x00, 
                        0x00, 
                        0x00 };
   CommandAPDU apdu1 = new CommandAPDU( cmd1,   // Byte array to use
                                           0,   // index to start of msg
                                           9 );// msg length

如何使用smartcardio和Java控制ACR122上的LED？

How to Control LED on ACR122 using smartcardio and Java?

java

nfc

smartcardio