我正在用acr122U设备（PN532芯片）模拟ndef标签。我的出发点是How to card emulate with ACR122U-A9的问题。我可以使用直接命令管理设备（可以更改LED或蜂鸣器状态）。但是当我传递tgInitAsTarget命令时无法从设备获得响应。没有错误，我通过tgInitAsTarget时得到的响应为空。
我正在使用Java的Windows 10机器上工作，acr122u固件是ACR122U215版本。
这是我的命令和响应：
Read registers
<< FF 00 00 00 08 D4 06 63 05 63 0D 63 38
>> D5 07 07 00 05 90 00
Write registers
<< FF 00 00 00 11 D4 08 63 02 80 63 03 80 63 05 07 63 0D 00 63 38 05
>> D5 09 90 00
Set parameters
<< FF 00 00 00 03 D4 12 30
>> D5 13 90 00
tgInitAsTargetCommand
<< FF 00 00 00 27 D4 8C 05 04 00 12 34 56 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>
应该有一个回应，但是我没有得到回应，我想知道是怎么回事？
tgInitAsTargetCommand
<< FF 00 00 00 27 D4 8C 05 04 00 12 34 56 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>> //??Why could not I get response?