title: Send TgInitAsTarget command to PN532 (ELEHOUSE module)，get ACK frame back, but lost the normal information frame
body: <p>I am getting started with a PN532 NFC module recently. I can successfully read/write M1 and S50 cards.</p>
  
  <p>Now I am trying to learn how to use P2P communication. However, 
  when I send a TgInitAsTarget command to the PN532 (ELEHOUSE module), I receive an ACK frame, but I never receive the normal information frame that should follow afterwards.</p>
  
  <p>Here are my steps:</p>
  
  <ol>
  <li><p>Get PN532 into target mode by sending TgInitAsTarget command:</p>
  
  <pre><code>TgInitAsTarget:
  { 00 00 ff 0x27 0xd9
    d4 8c 04
       08 00 12 34 56 40
       01 fe a2 a3 a4 a5 a6 a7   c0 c1 c2 c3 c4 c5 c6 c7   ff ff
       aa 99 88 77 66 55 44 33 22 11
       00
       00
    fd 00 }
  </code></pre></li>
  <li><p>Get a second PN532 into initiator mode by sending InJumpForDEP command:</p>
  
  <pre><code>InJumpForDEP:
  { 00 00 ff 0a f6
    d4 56 01 02
       01   00 ff ff 00 00
    d4 00 }
  </code></pre></li>
  <li><p>Put the initiator above the target.</p></li>
  <li><p>When I read the information received from the target through UART, I get the following:</p>
  
  <pre><code>target-&gt;pc:
  { 01
    00 00 ff 00 ff 00 }
  </code></pre>
  
  <p>This seems to be an ACK frame indicating that the TgInitAsTarget command was processed correctly. But afterwards the PN532 does not send the normal information frame containing the result of the TgInitAsTarget command and the target is always in busy state.</p></li>
  </ol>
  
  <p>What is going wrong here?</p>