ACR122u直接通讯无反应

我正在尝试通过发送直接命令来使用 java 访问我的 ACR122u。奇怪的是我没有得到任何响应，也没有错误。这是我的代码：

final static int IOCTL_SMARTCARD_ACR122_ESCAPE_COMMAND = 0x003136B0;

.....

List<CardTerminal>  terminals   = null; 
TerminalFactory factory         = TerminalFactory.getDefault();
terminals                       = factory.terminals().list();

CardTerminal terminal   = terminals.get(0);
Card card               = terminal.connect("direct");

CardChannel channel     = card.getBasicChannel();

byte[] commandAPDU      = {(byte) 0xD4, 0x06, 0x63, 0x05, 0x63, 0x0D, 0x63, 0x38 }; 
byte[] responseAPDU     = card.transmitControlCommand(IOCTL_SMARTCARD_ACR122_ESCAPE_COMMAND, commandAPDU );             

System.out.println(bytesToHex(responseAPDU) + "...");

有谁知道造成这种情况的原因吗？

提前谢谢了！

最后，我有解决方案。如果其他人也遇到同样的问题，我会回答我自己的问题。

错误是我只在这里发送消息。和new CommandAPDU()您已经定义了 Class、INS、P1、P2。除此之外，您不需要定义Lc 因为 javac 会为我们做这件事. With transmitControlCommand你确实需要定义Lc。因此，有了这些知识，新的（工作）代码是：

List<CardTerminal>  terminals   = null; 
TerminalFactory factory         = TerminalFactory.getDefault();
terminals                       = factory.terminals().list();

CardTerminal terminal   = terminals.get(0);
Card card               = terminal.connect("direct");

CardChannel channel     = card.getBasicChannel();

//Read register
byte[] commandAPDU1     = {(byte)0xFF,0x00,0x00,0x00,0x08,  (byte)0xD4, 0x06, 0x63, 0x05, 0x63, 0x0D, 0x63, 0x38 }; 
byte[] responseAPDU1    = card.transmitControlCommand(IOCTL_SMARTCARD_ACR122_ESCAPE_COMMAND, commandAPDU1 );                

System.out.println(bytesToHex(responseAPDU1) + "...");
//Response: D5070707059000...