title: How to card emulate with ACR122U-A9
body: <p>I have a ACR122U-A9, I want to card emulate with it. 
  I ask who has done this point? Can you give me some suggestions?</p>
  
  <p>Now I have also other problems, when I put the white smartcard on this NFC reader, LED blinks only once. But when I put the phone on it, the LED always blinks until phone out.</p>