Sophie

Sophie

distrib > Fedora > 14 > x86_64 > media > updates > by-pkgid > f831237475ece7d1519c6812064707d4 > files > 57

libnfc-devel-1.4.2-1.fc14.i686.rpm

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<title>libnfc: nfc-anticol.c Source File</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<link href="doxygen.css" rel="stylesheet" type="text/css"/>
</head>
<body>
<!-- Generated by Doxygen 1.7.3 -->
<div id="top">
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
 <tbody>
 <tr style="height: 56px;">
  <td style="padding-left: 0.5em;">
   <div id="projectname">libnfc&#160;<span id="projectnumber">1.4.2</span></div>
  </td>
 </tr>
 </tbody>
</table>
</div>
  <div id="navrow1" class="tabs">
    <ul class="tablist">
      <li><a href="index.html"><span>Main&#160;Page</span></a></li>
      <li><a href="annotated.html"><span>Data&#160;Structures</span></a></li>
      <li class="current"><a href="files.html"><span>Files</span></a></li>
      <li><a href="dirs.html"><span>Directories</span></a></li>
    </ul>
  </div>
  <div id="navrow2" class="tabs2">
    <ul class="tablist">
      <li><a href="files.html"><span>File&#160;List</span></a></li>
      <li><a href="globals.html"><span>Globals</span></a></li>
    </ul>
  </div>
  <div id="nav-path" class="navpath">
    <ul>
      <li class="navelem"><a class="el" href="dir_e1066e20c97c3d492c10ec6dd00ee654.html">examples</a>      </li>
    </ul>
  </div>
</div>
<div class="header">
  <div class="headertitle">
<h1>nfc-anticol.c</h1>  </div>
</div>
<div class="contents">
<a href="nfc-anticol_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*-</span>
<a name="l00002"></a>00002 <span class="comment"> * Public platform independent Near Field Communication (NFC) library examples</span>
<a name="l00003"></a>00003 <span class="comment"> * </span>
<a name="l00004"></a>00004 <span class="comment"> * Copyright (C) 2009, Roel Verdult</span>
<a name="l00005"></a>00005 <span class="comment"> * </span>
<a name="l00006"></a>00006 <span class="comment"> * Redistribution and use in source and binary forms, with or without</span>
<a name="l00007"></a>00007 <span class="comment"> * modification, are permitted provided that the following conditions are met:</span>
<a name="l00008"></a>00008 <span class="comment"> *  1) Redistributions of source code must retain the above copyright notice,</span>
<a name="l00009"></a>00009 <span class="comment"> *  this list of conditions and the following disclaimer. </span>
<a name="l00010"></a>00010 <span class="comment"> *  2 )Redistributions in binary form must reproduce the above copyright</span>
<a name="l00011"></a>00011 <span class="comment"> *  notice, this list of conditions and the following disclaimer in the</span>
<a name="l00012"></a>00012 <span class="comment"> *  documentation and/or other materials provided with the distribution.</span>
<a name="l00013"></a>00013 <span class="comment"> *</span>
<a name="l00014"></a>00014 <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS &quot;AS IS&quot;</span>
<a name="l00015"></a>00015 <span class="comment"> * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE</span>
<a name="l00016"></a>00016 <span class="comment"> * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE</span>
<a name="l00017"></a>00017 <span class="comment"> * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE</span>
<a name="l00018"></a>00018 <span class="comment"> * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR</span>
<a name="l00019"></a>00019 <span class="comment"> * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF</span>
<a name="l00020"></a>00020 <span class="comment"> * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS</span>
<a name="l00021"></a>00021 <span class="comment"> * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN</span>
<a name="l00022"></a>00022 <span class="comment"> * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)</span>
<a name="l00023"></a>00023 <span class="comment"> * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE</span>
<a name="l00024"></a>00024 <span class="comment"> * POSSIBILITY OF SUCH DAMAGE.</span>
<a name="l00025"></a>00025 <span class="comment"> * </span>
<a name="l00026"></a>00026 <span class="comment"> * Note that this license only applies on the examples, NFC library itself is under LGPL</span>
<a name="l00027"></a>00027 <span class="comment"> *</span>
<a name="l00028"></a>00028 <span class="comment"> */</span>
<a name="l00029"></a>00029 
<a name="l00035"></a>00035 <span class="preprocessor">#ifdef HAVE_CONFIG_H</span>
<a name="l00036"></a>00036 <span class="preprocessor"></span><span class="preprocessor">#  include &quot;config.h&quot;</span>
<a name="l00037"></a>00037 <span class="preprocessor">#endif // HAVE_CONFIG_H</span>
<a name="l00038"></a>00038 <span class="preprocessor"></span>
<a name="l00039"></a>00039 <span class="preprocessor">#include &lt;stdio.h&gt;</span>
<a name="l00040"></a>00040 <span class="preprocessor">#include &lt;stdlib.h&gt;</span>
<a name="l00041"></a>00041 <span class="preprocessor">#include &lt;stddef.h&gt;</span>
<a name="l00042"></a>00042 <span class="preprocessor">#include &lt;stdint.h&gt;</span>
<a name="l00043"></a>00043 <span class="preprocessor">#include &lt;stdbool.h&gt;</span>
<a name="l00044"></a>00044 <span class="preprocessor">#include &lt;string.h&gt;</span>
<a name="l00045"></a>00045 
<a name="l00046"></a>00046 <span class="preprocessor">#include &lt;nfc/nfc.h&gt;</span>
<a name="l00047"></a>00047 
<a name="l00048"></a>00048 <span class="preprocessor">#include &lt;nfc/nfc-messages.h&gt;</span>
<a name="l00049"></a>00049 <span class="preprocessor">#include &quot;<a class="code" href="nfc-utils_8h.html" title="Provide some examples shared functions like print, parity calculation, options parsing.">nfc-utils.h</a>&quot;</span>
<a name="l00050"></a>00050 
<a name="l00051"></a>00051 <span class="preprocessor">#define SAK_FLAG_ATS_SUPPORTED 0x20</span>
<a name="l00052"></a>00052 <span class="preprocessor"></span>
<a name="l00053"></a>00053 <span class="preprocessor">#define MAX_FRAME_LEN 264</span>
<a name="l00054"></a>00054 <span class="preprocessor"></span>
<a name="l00055"></a>00055 <span class="keyword">static</span> byte_t abtRx[MAX_FRAME_LEN];
<a name="l00056"></a>00056 <span class="keyword">static</span> <span class="keywordtype">size_t</span> szRxBits;
<a name="l00057"></a>00057 <span class="keyword">static</span> <span class="keywordtype">size_t</span> szRx;
<a name="l00058"></a>00058 <span class="keyword">static</span> byte_t abtRawUid[12];
<a name="l00059"></a>00059 <span class="keyword">static</span> byte_t abtAtqa[2];
<a name="l00060"></a>00060 <span class="keyword">static</span> byte_t abtSak;
<a name="l00061"></a>00061 <span class="keyword">static</span> <span class="keywordtype">size_t</span> szCL = 1;<span class="comment">//Always start with Cascade Level 1 (CL1)</span>
<a name="l00062"></a>00062 <span class="keyword">static</span> <a class="code" href="structnfc__device__t.html" title="NFC device information.">nfc_device_t</a> *pnd;
<a name="l00063"></a>00063 
<a name="l00064"></a>00064 <span class="keywordtype">bool</span>    quiet_output = <span class="keyword">false</span>;
<a name="l00065"></a>00065 
<a name="l00066"></a>00066 <span class="comment">// ISO14443A Anti-Collision Commands</span>
<a name="l00067"></a>00067 byte_t  abtReqa[1] = { 0x26 };
<a name="l00068"></a>00068 byte_t  abtSelectAll[2] = { 0x93, 0x20 };
<a name="l00069"></a>00069 byte_t  abtSelectTag[9] = { 0x93, 0x70, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
<a name="l00070"></a>00070 byte_t  abtRats[4] = { 0xe0, 0x50, 0x00, 0x00 };
<a name="l00071"></a>00071 byte_t  abtHalt[4] = { 0x50, 0x00, 0x00, 0x00 };
<a name="l00072"></a>00072 <span class="preprocessor">#define CASCADE_BIT 0x04</span>
<a name="l00073"></a>00073 <span class="preprocessor"></span>
<a name="l00074"></a>00074 <span class="keyword">static</span>  <span class="keywordtype">bool</span>
<a name="l00075"></a>00075 transmit_bits (<span class="keyword">const</span> byte_t * pbtTx, <span class="keyword">const</span> <span class="keywordtype">size_t</span> szTxBits)
<a name="l00076"></a>00076 {
<a name="l00077"></a>00077   <span class="comment">// Show transmitted command</span>
<a name="l00078"></a>00078   <span class="keywordflow">if</span> (!quiet_output) {
<a name="l00079"></a>00079     printf (<span class="stringliteral">&quot;Sent bits:     &quot;</span>);
<a name="l00080"></a>00080     print_hex_bits (pbtTx, szTxBits);
<a name="l00081"></a>00081   }
<a name="l00082"></a>00082   <span class="comment">// Transmit the bit frame command, we don&#39;t use the arbitrary parity feature</span>
<a name="l00083"></a>00083   <span class="keywordflow">if</span> (!<a class="code" href="nfc_8c.html#aa20007e4440af8d489dc6745f0219d4c" title="Transceive raw bit-frames to a target.">nfc_initiator_transceive_bits</a> (pnd, pbtTx, szTxBits, NULL, abtRx, &amp;szRxBits, NULL))
<a name="l00084"></a>00084     <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00085"></a>00085 
<a name="l00086"></a>00086   <span class="comment">// Show received answer</span>
<a name="l00087"></a>00087   <span class="keywordflow">if</span> (!quiet_output) {
<a name="l00088"></a>00088     printf (<span class="stringliteral">&quot;Received bits: &quot;</span>);
<a name="l00089"></a>00089     print_hex_bits (abtRx, szRxBits);
<a name="l00090"></a>00090   }
<a name="l00091"></a>00091   <span class="comment">// Succesful transfer</span>
<a name="l00092"></a>00092   <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00093"></a>00093 }
<a name="l00094"></a>00094 
<a name="l00095"></a>00095 
<a name="l00096"></a>00096 <span class="keyword">static</span>  <span class="keywordtype">bool</span>
<a name="l00097"></a>00097 transmit_bytes (<span class="keyword">const</span> byte_t * pbtTx, <span class="keyword">const</span> <span class="keywordtype">size_t</span> szTx)
<a name="l00098"></a>00098 {
<a name="l00099"></a>00099   <span class="comment">// Show transmitted command</span>
<a name="l00100"></a>00100   <span class="keywordflow">if</span> (!quiet_output) {
<a name="l00101"></a>00101     printf (<span class="stringliteral">&quot;Sent bits:     &quot;</span>);
<a name="l00102"></a>00102     print_hex (pbtTx, szTx);
<a name="l00103"></a>00103   }
<a name="l00104"></a>00104   <span class="comment">// Transmit the command bytes</span>
<a name="l00105"></a>00105   <span class="keywordflow">if</span> (!<a class="code" href="nfc_8c.html#a9e32d7ad73ef60bb198a8f0d36da0890" title="Send data to target then retrieve data from target.">nfc_initiator_transceive_bytes</a> (pnd, pbtTx, szTx, abtRx, &amp;szRx))
<a name="l00106"></a>00106     <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00107"></a>00107 
<a name="l00108"></a>00108   <span class="comment">// Show received answer</span>
<a name="l00109"></a>00109   <span class="keywordflow">if</span> (!quiet_output) {
<a name="l00110"></a>00110     printf (<span class="stringliteral">&quot;Received bits: &quot;</span>);
<a name="l00111"></a>00111     print_hex (abtRx, szRx);
<a name="l00112"></a>00112   }
<a name="l00113"></a>00113   <span class="comment">// Succesful transfer</span>
<a name="l00114"></a>00114   <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00115"></a>00115 }
<a name="l00116"></a>00116 
<a name="l00117"></a>00117 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00118"></a>00118 print_usage (<span class="keywordtype">char</span> *argv[])
<a name="l00119"></a>00119 {
<a name="l00120"></a>00120   printf (<span class="stringliteral">&quot;Usage: %s [OPTIONS]\n&quot;</span>, argv[0]);
<a name="l00121"></a>00121   printf (<span class="stringliteral">&quot;Options:\n&quot;</span>);
<a name="l00122"></a>00122   printf (<span class="stringliteral">&quot;\t-h\tHelp. Print this message.\n&quot;</span>);
<a name="l00123"></a>00123   printf (<span class="stringliteral">&quot;\t-q\tQuiet mode. Suppress output of READER and EMULATOR data (improves timing).\n&quot;</span>);
<a name="l00124"></a>00124 }
<a name="l00125"></a>00125 
<a name="l00126"></a>00126 <span class="keywordtype">int</span>
<a name="l00127"></a>00127 main (<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> *argv[])
<a name="l00128"></a>00128 {
<a name="l00129"></a>00129   <span class="keywordtype">int</span>     arg;
<a name="l00130"></a>00130 
<a name="l00131"></a>00131   <span class="comment">// Get commandline options</span>
<a name="l00132"></a>00132   <span class="keywordflow">for</span> (arg = 1; arg &lt; argc; arg++) {
<a name="l00133"></a>00133     <span class="keywordflow">if</span> (0 == strcmp (argv[arg], <span class="stringliteral">&quot;-h&quot;</span>)) {
<a name="l00134"></a>00134       print_usage (argv);
<a name="l00135"></a>00135       exit(EXIT_SUCCESS);
<a name="l00136"></a>00136     } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (0 == strcmp (argv[arg], <span class="stringliteral">&quot;-q&quot;</span>)) {
<a name="l00137"></a>00137       quiet_output = <span class="keyword">true</span>;
<a name="l00138"></a>00138     } <span class="keywordflow">else</span> {
<a name="l00139"></a>00139       ERR (<span class="stringliteral">&quot;%s is not supported option.&quot;</span>, argv[arg]);
<a name="l00140"></a>00140       print_usage (argv);
<a name="l00141"></a>00141       exit(EXIT_FAILURE);
<a name="l00142"></a>00142     }
<a name="l00143"></a>00143   }
<a name="l00144"></a>00144 
<a name="l00145"></a>00145   <span class="comment">// Try to open the NFC reader</span>
<a name="l00146"></a>00146   pnd = <a class="code" href="nfc_8c.html#aff0c2c92d2fc81e5dc93150fc72a7de6" title="Connect to a NFC device.">nfc_connect</a> (NULL);
<a name="l00147"></a>00147 
<a name="l00148"></a>00148   <span class="keywordflow">if</span> (!pnd) {
<a name="l00149"></a>00149     printf (<span class="stringliteral">&quot;Error connecting NFC reader\n&quot;</span>);
<a name="l00150"></a>00150     exit(EXIT_FAILURE);
<a name="l00151"></a>00151   }
<a name="l00152"></a>00152 
<a name="l00153"></a>00153   <span class="comment">// Initialise NFC device as &quot;initiator&quot;</span>
<a name="l00154"></a>00154   <a class="code" href="nfc_8c.html#a1c05aadcf1b30e8d69969dfd74a793f2" title="Initialize NFC device as initiator (reader)">nfc_initiator_init</a> (pnd);
<a name="l00155"></a>00155 
<a name="l00156"></a>00156   <span class="comment">// Drop the field for a while</span>
<a name="l00157"></a>00157   <span class="keywordflow">if</span> (!<a class="code" href="nfc_8c.html#a6cd940508b34b99c6c94173f8300d069" title="Configure advanced NFC device settings.">nfc_configure</a> (pnd, <a class="code" href="nfc-types_8h.html#ab2cdef5e5ac453e9c60c9fe449cb311ea932832c243c9448924de6e21aa622d07">NDO_ACTIVATE_FIELD</a>, <span class="keyword">false</span>)) {
<a name="l00158"></a>00158     <a class="code" href="nfc_8c.html#a111b9182fc80b309b56009e9c6be7454" title="Display the PCD error a-la perror.">nfc_perror</a> (pnd, <span class="stringliteral">&quot;nfc_configure&quot;</span>);
<a name="l00159"></a>00159     exit (EXIT_FAILURE);
<a name="l00160"></a>00160   }
<a name="l00161"></a>00161 
<a name="l00162"></a>00162   <span class="comment">// Configure the CRC</span>
<a name="l00163"></a>00163   <span class="keywordflow">if</span> (!<a class="code" href="nfc_8c.html#a6cd940508b34b99c6c94173f8300d069" title="Configure advanced NFC device settings.">nfc_configure</a> (pnd, <a class="code" href="nfc-types_8h.html#ab2cdef5e5ac453e9c60c9fe449cb311ea34588e4870fcc10476151e27e8e97a74">NDO_HANDLE_CRC</a>, <span class="keyword">false</span>)) {
<a name="l00164"></a>00164     <a class="code" href="nfc_8c.html#a111b9182fc80b309b56009e9c6be7454" title="Display the PCD error a-la perror.">nfc_perror</a> (pnd, <span class="stringliteral">&quot;nfc_configure&quot;</span>);
<a name="l00165"></a>00165     exit (EXIT_FAILURE);
<a name="l00166"></a>00166   }
<a name="l00167"></a>00167   <span class="comment">// Configure parity settings</span>
<a name="l00168"></a>00168   <span class="keywordflow">if</span> (!<a class="code" href="nfc_8c.html#a6cd940508b34b99c6c94173f8300d069" title="Configure advanced NFC device settings.">nfc_configure</a> (pnd, <a class="code" href="nfc-types_8h.html#ab2cdef5e5ac453e9c60c9fe449cb311ea7c1f6097b2d2a1670f580de332c41596">NDO_HANDLE_PARITY</a>, <span class="keyword">true</span>)) {
<a name="l00169"></a>00169     <a class="code" href="nfc_8c.html#a111b9182fc80b309b56009e9c6be7454" title="Display the PCD error a-la perror.">nfc_perror</a> (pnd, <span class="stringliteral">&quot;nfc_configure&quot;</span>);
<a name="l00170"></a>00170     exit (EXIT_FAILURE);
<a name="l00171"></a>00171   }
<a name="l00172"></a>00172   <span class="comment">// Use raw send/receive methods</span>
<a name="l00173"></a>00173   <span class="keywordflow">if</span> (!<a class="code" href="nfc_8c.html#a6cd940508b34b99c6c94173f8300d069" title="Configure advanced NFC device settings.">nfc_configure</a> (pnd, <a class="code" href="nfc-types_8h.html#ab2cdef5e5ac453e9c60c9fe449cb311eabb3413ff22c634f90298444e0fffed5f">NDO_EASY_FRAMING</a>, <span class="keyword">false</span>)) {
<a name="l00174"></a>00174     <a class="code" href="nfc_8c.html#a111b9182fc80b309b56009e9c6be7454" title="Display the PCD error a-la perror.">nfc_perror</a> (pnd, <span class="stringliteral">&quot;nfc_configure&quot;</span>);
<a name="l00175"></a>00175     exit (EXIT_FAILURE);
<a name="l00176"></a>00176   }
<a name="l00177"></a>00177   <span class="comment">// Disable 14443-4 autoswitching</span>
<a name="l00178"></a>00178   <span class="keywordflow">if</span> (!<a class="code" href="nfc_8c.html#a6cd940508b34b99c6c94173f8300d069" title="Configure advanced NFC device settings.">nfc_configure</a> (pnd, <a class="code" href="nfc-types_8h.html#ab2cdef5e5ac453e9c60c9fe449cb311eae40c8c9da1c2e8d123948e03374a1c0c">NDO_AUTO_ISO14443_4</a>, <span class="keyword">false</span>)) {
<a name="l00179"></a>00179     <a class="code" href="nfc_8c.html#a111b9182fc80b309b56009e9c6be7454" title="Display the PCD error a-la perror.">nfc_perror</a> (pnd, <span class="stringliteral">&quot;nfc_configure&quot;</span>);
<a name="l00180"></a>00180     exit (EXIT_FAILURE);
<a name="l00181"></a>00181   }
<a name="l00182"></a>00182   <span class="comment">// Force 14443-A mode</span>
<a name="l00183"></a>00183   <span class="keywordflow">if</span> (!<a class="code" href="nfc_8c.html#a6cd940508b34b99c6c94173f8300d069" title="Configure advanced NFC device settings.">nfc_configure</a> (pnd, <a class="code" href="nfc-types_8h.html#ab2cdef5e5ac453e9c60c9fe449cb311ea6dafbd16a163d494637d9d640cf3d8f1">NDO_FORCE_ISO14443_A</a>, <span class="keyword">true</span>)) {
<a name="l00184"></a>00184     <a class="code" href="nfc_8c.html#a111b9182fc80b309b56009e9c6be7454" title="Display the PCD error a-la perror.">nfc_perror</a> (pnd, <span class="stringliteral">&quot;nfc_configure&quot;</span>);
<a name="l00185"></a>00185     exit (EXIT_FAILURE);
<a name="l00186"></a>00186   }
<a name="l00187"></a>00187 
<a name="l00188"></a>00188   <span class="comment">// Enable field so more power consuming cards can power themselves up</span>
<a name="l00189"></a>00189   <span class="keywordflow">if</span> (!<a class="code" href="nfc_8c.html#a6cd940508b34b99c6c94173f8300d069" title="Configure advanced NFC device settings.">nfc_configure</a> (pnd, <a class="code" href="nfc-types_8h.html#ab2cdef5e5ac453e9c60c9fe449cb311ea932832c243c9448924de6e21aa622d07">NDO_ACTIVATE_FIELD</a>, <span class="keyword">true</span>)) {
<a name="l00190"></a>00190     <a class="code" href="nfc_8c.html#a111b9182fc80b309b56009e9c6be7454" title="Display the PCD error a-la perror.">nfc_perror</a> (pnd, <span class="stringliteral">&quot;nfc_configure&quot;</span>);
<a name="l00191"></a>00191     exit (EXIT_FAILURE);
<a name="l00192"></a>00192   }
<a name="l00193"></a>00193 
<a name="l00194"></a>00194   printf (<span class="stringliteral">&quot;Connected to NFC reader: %s\n\n&quot;</span>, pnd-&gt;<a class="code" href="structnfc__device__t.html#a3933f0bea196fedca0345a7f940dc85b">acName</a>);
<a name="l00195"></a>00195 
<a name="l00196"></a>00196   <span class="comment">// Send the 7 bits request command specified in ISO 14443A (0x26)</span>
<a name="l00197"></a>00197   <span class="keywordflow">if</span> (!transmit_bits (abtReqa, 7)) {
<a name="l00198"></a>00198     printf (<span class="stringliteral">&quot;Error: No tag available\n&quot;</span>);
<a name="l00199"></a>00199     <a class="code" href="nfc_8c.html#a442dc68878c3a0bb7e3293c8fd96afb0" title="Disconnect from a NFC device.">nfc_disconnect</a> (pnd);
<a name="l00200"></a>00200     <span class="keywordflow">return</span> 1;
<a name="l00201"></a>00201   }
<a name="l00202"></a>00202   memcpy (abtAtqa, abtRx, 2);
<a name="l00203"></a>00203 
<a name="l00204"></a>00204   <span class="comment">// Anti-collision</span>
<a name="l00205"></a>00205   transmit_bytes (abtSelectAll, 2);
<a name="l00206"></a>00206 
<a name="l00207"></a>00207   <span class="comment">// Check answer</span>
<a name="l00208"></a>00208   <span class="keywordflow">if</span> ((abtRx[0] ^ abtRx[1] ^ abtRx[2] ^ abtRx[3] ^ abtRx[4]) != 0) {
<a name="l00209"></a>00209     printf(<span class="stringliteral">&quot;WARNING: BCC check failed!\n&quot;</span>);
<a name="l00210"></a>00210   }
<a name="l00211"></a>00211 
<a name="l00212"></a>00212   <span class="comment">// Save the UID CL1</span>
<a name="l00213"></a>00213   memcpy (abtRawUid, abtRx, 4);
<a name="l00214"></a>00214 
<a name="l00215"></a>00215   <span class="comment">//Prepare and send CL1 Select-Command</span>
<a name="l00216"></a>00216   memcpy (abtSelectTag + 2, abtRx, 5);
<a name="l00217"></a>00217   iso14443a_crc_append (abtSelectTag, 7);
<a name="l00218"></a>00218   transmit_bytes (abtSelectTag, 9);
<a name="l00219"></a>00219   abtSak = abtRx[0];
<a name="l00220"></a>00220 
<a name="l00221"></a>00221   <span class="comment">// Test if we are dealing with a CL2</span>
<a name="l00222"></a>00222   <span class="keywordflow">if</span> (abtSak &amp; CASCADE_BIT) {
<a name="l00223"></a>00223     szCL = 2;<span class="comment">//or more</span>
<a name="l00224"></a>00224     <span class="comment">// Check answer</span>
<a name="l00225"></a>00225     <span class="keywordflow">if</span> (abtRawUid[0] != 0x88) {
<a name="l00226"></a>00226       printf(<span class="stringliteral">&quot;WARNING: Cascade bit set but CT != 0x88!\n&quot;</span>);
<a name="l00227"></a>00227     }
<a name="l00228"></a>00228   }
<a name="l00229"></a>00229 
<a name="l00230"></a>00230   <span class="keywordflow">if</span>(szCL == 2) {
<a name="l00231"></a>00231     <span class="comment">// We have to do the anti-collision for cascade level 2</span>
<a name="l00232"></a>00232 
<a name="l00233"></a>00233     <span class="comment">// Prepare CL2 commands</span>
<a name="l00234"></a>00234     abtSelectAll[0] = 0x95;
<a name="l00235"></a>00235 
<a name="l00236"></a>00236     <span class="comment">// Anti-collision</span>
<a name="l00237"></a>00237     transmit_bytes (abtSelectAll, 2);
<a name="l00238"></a>00238 
<a name="l00239"></a>00239     <span class="comment">// Check answer</span>
<a name="l00240"></a>00240     <span class="keywordflow">if</span> ((abtRx[0] ^ abtRx[1] ^ abtRx[2] ^ abtRx[3] ^ abtRx[4]) != 0) {
<a name="l00241"></a>00241       printf(<span class="stringliteral">&quot;WARNING: BCC check failed!\n&quot;</span>);
<a name="l00242"></a>00242     }
<a name="l00243"></a>00243 
<a name="l00244"></a>00244     <span class="comment">// Save UID CL2</span>
<a name="l00245"></a>00245     memcpy (abtRawUid + 4, abtRx, 4);
<a name="l00246"></a>00246 
<a name="l00247"></a>00247     <span class="comment">// Selection</span>
<a name="l00248"></a>00248     abtSelectTag[0] = 0x95;
<a name="l00249"></a>00249     memcpy (abtSelectTag + 2, abtRx, 5);
<a name="l00250"></a>00250     iso14443a_crc_append (abtSelectTag, 7);
<a name="l00251"></a>00251     transmit_bytes (abtSelectTag, 9);
<a name="l00252"></a>00252     abtSak = abtRx[0];
<a name="l00253"></a>00253 
<a name="l00254"></a>00254     <span class="comment">// Test if we are dealing with a CL3</span>
<a name="l00255"></a>00255     <span class="keywordflow">if</span> (abtSak &amp; CASCADE_BIT) {
<a name="l00256"></a>00256       szCL = 3;
<a name="l00257"></a>00257       <span class="comment">// Check answer</span>
<a name="l00258"></a>00258       <span class="keywordflow">if</span> (abtRawUid[0] != 0x88) {
<a name="l00259"></a>00259         printf(<span class="stringliteral">&quot;WARNING: Cascade bit set but CT != 0x88!\n&quot;</span>);
<a name="l00260"></a>00260       }
<a name="l00261"></a>00261     }
<a name="l00262"></a>00262 
<a name="l00263"></a>00263     <span class="keywordflow">if</span> ( szCL == 3) {
<a name="l00264"></a>00264       <span class="comment">// We have to do the anti-collision for cascade level 3</span>
<a name="l00265"></a>00265 
<a name="l00266"></a>00266       <span class="comment">// Prepare and send CL3 AC-Command</span>
<a name="l00267"></a>00267       abtSelectAll[0] = 0x97;
<a name="l00268"></a>00268       transmit_bytes (abtSelectAll, 2);
<a name="l00269"></a>00269 
<a name="l00270"></a>00270       <span class="comment">// Check answer</span>
<a name="l00271"></a>00271       <span class="keywordflow">if</span> ((abtRx[0] ^ abtRx[1] ^ abtRx[2] ^ abtRx[3] ^ abtRx[4]) != 0) {
<a name="l00272"></a>00272         printf(<span class="stringliteral">&quot;WARNING: BCC check failed!\n&quot;</span>);
<a name="l00273"></a>00273       }
<a name="l00274"></a>00274 
<a name="l00275"></a>00275       <span class="comment">// Save UID CL3</span>
<a name="l00276"></a>00276       memcpy (abtRawUid + 8, abtRx, 4);
<a name="l00277"></a>00277 
<a name="l00278"></a>00278       <span class="comment">// Prepare and send final Select-Command</span>
<a name="l00279"></a>00279       abtSelectTag[0] = 0x97;
<a name="l00280"></a>00280       memcpy (abtSelectTag + 2, abtRx, 5);
<a name="l00281"></a>00281       iso14443a_crc_append (abtSelectTag, 7);
<a name="l00282"></a>00282       transmit_bytes (abtSelectTag, 9);
<a name="l00283"></a>00283       abtSak = abtRx[0];
<a name="l00284"></a>00284     }
<a name="l00285"></a>00285   }
<a name="l00286"></a>00286 
<a name="l00287"></a>00287   <span class="comment">// Request ATS, this only applies to tags that support ISO 14443A-4</span>
<a name="l00288"></a>00288   <span class="keywordflow">if</span> (abtRx[0] &amp; SAK_FLAG_ATS_SUPPORTED) {
<a name="l00289"></a>00289     iso14443a_crc_append(abtRats, 2);
<a name="l00290"></a>00290     transmit_bytes (abtRats, 4);
<a name="l00291"></a>00291   }
<a name="l00292"></a>00292 
<a name="l00293"></a>00293   <span class="comment">// Done, halt the tag now</span>
<a name="l00294"></a>00294   iso14443a_crc_append(abtHalt, 2);
<a name="l00295"></a>00295   transmit_bytes (abtHalt, 4);
<a name="l00296"></a>00296 
<a name="l00297"></a>00297   printf (<span class="stringliteral">&quot;\nFound tag with\n UID: &quot;</span>);
<a name="l00298"></a>00298   <span class="keywordflow">switch</span> (szCL) {
<a name="l00299"></a>00299     <span class="keywordflow">case</span> 1:
<a name="l00300"></a>00300       printf (<span class="stringliteral">&quot;%02x%02x%02x%02x&quot;</span>, abtRawUid[0], abtRawUid[1], abtRawUid[2], abtRawUid[3]);
<a name="l00301"></a>00301     <span class="keywordflow">break</span>;
<a name="l00302"></a>00302     <span class="keywordflow">case</span> 2:
<a name="l00303"></a>00303       printf (<span class="stringliteral">&quot;%02x%02x%02x&quot;</span>, abtRawUid[1], abtRawUid[2], abtRawUid[3]);
<a name="l00304"></a>00304       printf (<span class="stringliteral">&quot;%02x%02x%02x%02x&quot;</span>, abtRawUid[4], abtRawUid[5], abtRawUid[6], abtRawUid[7]);
<a name="l00305"></a>00305     <span class="keywordflow">break</span>;
<a name="l00306"></a>00306     <span class="keywordflow">case</span> 3:
<a name="l00307"></a>00307       printf (<span class="stringliteral">&quot;%02x%02x%02x&quot;</span>, abtRawUid[1], abtRawUid[2], abtRawUid[3]);
<a name="l00308"></a>00308       printf (<span class="stringliteral">&quot;%02x%02x%02x&quot;</span>, abtRawUid[5], abtRawUid[6], abtRawUid[7]);
<a name="l00309"></a>00309       printf (<span class="stringliteral">&quot;%02x%02x%02x%02x&quot;</span>, abtRawUid[8], abtRawUid[9], abtRawUid[10], abtRawUid[11]);
<a name="l00310"></a>00310     <span class="keywordflow">break</span>;
<a name="l00311"></a>00311   }
<a name="l00312"></a>00312   printf(<span class="stringliteral">&quot;\n&quot;</span>);
<a name="l00313"></a>00313   printf(<span class="stringliteral">&quot;ATQA: %02x%02x\n SAK: %02x\n&quot;</span>, abtAtqa[1], abtAtqa[0], abtSak);
<a name="l00314"></a>00314 
<a name="l00315"></a>00315   <a class="code" href="nfc_8c.html#a442dc68878c3a0bb7e3293c8fd96afb0" title="Disconnect from a NFC device.">nfc_disconnect</a> (pnd);
<a name="l00316"></a>00316   <span class="keywordflow">return</span> 0;
<a name="l00317"></a>00317 }
</pre></div></div>
</div>
<hr class="footer"/><address class="footer"><small>Generated on Wed Feb 23 2011 for libnfc by&#160;
<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.7.3 </small></address>
</body>
</html>

Perl :: Catalyst :: PostgreSQL :: RPM Valid HTML 4.01 Transitional