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

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<h1>nfc-poll.c</h1>  </div>
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<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) 2010, Romuald Conty</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;err.h&gt;</span>
<a name="l00040"></a>00040 <span class="preprocessor">#include &lt;stdio.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;stdlib.h&gt;</span>
<a name="l00043"></a>00043 <span class="preprocessor">#include &lt;string.h&gt;</span>
<a name="l00044"></a>00044 
<a name="l00045"></a>00045 <span class="preprocessor">#include &lt;nfc/nfc.h&gt;</span>
<a name="l00046"></a>00046 <span class="preprocessor">#include &lt;nfc/nfc-types.h&gt;</span>
<a name="l00047"></a>00047 <span class="preprocessor">#include &lt;nfc/nfc-messages.h&gt;</span>
<a name="l00048"></a>00048 <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="l00049"></a>00049 
<a name="l00050"></a>00050 <span class="preprocessor">#define MAX_DEVICE_COUNT 16</span>
<a name="l00051"></a>00051 <span class="preprocessor"></span>
<a name="l00052"></a>00052 <span class="keyword">static</span> <a class="code" href="structnfc__device__t.html" title="NFC device information.">nfc_device_t</a> *pnd;
<a name="l00053"></a>00053 
<a name="l00054"></a>00054 <span class="keywordtype">int</span>
<a name="l00055"></a>00055 main (<span class="keywordtype">int</span> argc, <span class="keyword">const</span> <span class="keywordtype">char</span> *argv[])
<a name="l00056"></a>00056 {
<a name="l00057"></a>00057   <span class="keywordtype">size_t</span>  szFound;
<a name="l00058"></a>00058   <span class="keywordtype">size_t</span>  i;
<a name="l00059"></a>00059   <span class="keywordtype">bool</span> verbose = <span class="keyword">false</span>;
<a name="l00060"></a>00060   <a class="code" href="structnfc__device__desc__t.html" title="NFC device description.">nfc_device_desc_t</a> *pnddDevices;
<a name="l00061"></a>00061 
<a name="l00062"></a>00062   pnddDevices = parse_args (argc, argv, &amp;szFound, &amp;verbose);
<a name="l00063"></a>00063 
<a name="l00064"></a>00064   <span class="comment">// Display libnfc version</span>
<a name="l00065"></a>00065   <span class="keyword">const</span> <span class="keywordtype">char</span> *acLibnfcVersion = <a class="code" href="nfc_8c.html#aa48f27c0f93d6508ad9a5ae01ab054d4" title="Returns the library version.">nfc_version</a> ();
<a name="l00066"></a>00066 
<a name="l00067"></a>00067   <span class="keywordflow">if</span> (argc &gt; 1) {
<a name="l00068"></a>00068     errx (1, <span class="stringliteral">&quot;usage: %s&quot;</span>, argv[0]);
<a name="l00069"></a>00069   }
<a name="l00070"></a>00070 
<a name="l00071"></a>00071   printf (<span class="stringliteral">&quot;%s use libnfc %s\n&quot;</span>, argv[0], acLibnfcVersion);
<a name="l00072"></a>00072 
<a name="l00073"></a>00073   <span class="keywordflow">if</span> (szFound == 0) {
<a name="l00074"></a>00074     <span class="keywordflow">if</span> (!(pnddDevices = malloc (MAX_DEVICE_COUNT * <span class="keyword">sizeof</span> (*pnddDevices)))) {
<a name="l00075"></a>00075       fprintf (stderr, <span class="stringliteral">&quot;malloc() failed\n&quot;</span>);
<a name="l00076"></a>00076       <span class="keywordflow">return</span> EXIT_FAILURE;
<a name="l00077"></a>00077     }
<a name="l00078"></a>00078   }
<a name="l00079"></a>00079 
<a name="l00080"></a>00080   <a class="code" href="nfc_8c.html#a9073e8bf5089392979b187758f2cd7f9" title="Probe for discoverable supported devices (ie. only available for some drivers)">nfc_list_devices</a> (pnddDevices, MAX_DEVICE_COUNT, &amp;szFound);
<a name="l00081"></a>00081 
<a name="l00082"></a>00082   <span class="keywordflow">if</span> (szFound == 0) {
<a name="l00083"></a>00083     printf (<span class="stringliteral">&quot;No NFC device found.\n&quot;</span>);
<a name="l00084"></a>00084   }
<a name="l00085"></a>00085 
<a name="l00086"></a>00086   <span class="keywordflow">for</span> (i = 0; i &lt; szFound; i++) {
<a name="l00087"></a>00087 
<a name="l00088"></a>00088     <span class="keyword">const</span> byte_t btPollNr = 20;
<a name="l00089"></a>00089     <span class="keyword">const</span> byte_t btPeriod = 2;
<a name="l00090"></a>00090     <span class="keyword">const</span> <a class="code" href="structnfc__modulation__t.html" title="NFC modulation structure.">nfc_modulation_t</a> nmModulations[5] = {
<a name="l00091"></a>00091       { .nmt = NMT_ISO14443A, .nbr = NBR_106 },
<a name="l00092"></a>00092       { .nmt = NMT_ISO14443B, .nbr = NBR_106 },
<a name="l00093"></a>00093       { .nmt = NMT_FELICA, .nbr = NBR_212 },
<a name="l00094"></a>00094       { .nmt = NMT_FELICA, .nbr = NBR_424 },
<a name="l00095"></a>00095       { .nmt = NMT_JEWEL, .nbr = NBR_106 },
<a name="l00096"></a>00096     };
<a name="l00097"></a>00097     <span class="keyword">const</span> <span class="keywordtype">size_t</span> szModulations = 5;
<a name="l00098"></a>00098 
<a name="l00099"></a>00099     <a class="code" href="structnfc__target__t.html" title="NFC target structure.">nfc_target_t</a> antTargets[2];
<a name="l00100"></a>00100     <span class="keywordtype">size_t</span>  szTargetFound;
<a name="l00101"></a>00101     <span class="keywordtype">bool</span>    res;
<a name="l00102"></a>00102 
<a name="l00103"></a>00103     pnd = <a class="code" href="nfc_8c.html#aff0c2c92d2fc81e5dc93150fc72a7de6" title="Connect to a NFC device.">nfc_connect</a> (&amp;(pnddDevices[i]));
<a name="l00104"></a>00104 
<a name="l00105"></a>00105     <span class="keywordflow">if</span> (pnd == NULL) {
<a name="l00106"></a>00106       ERR (<span class="stringliteral">&quot;%s&quot;</span>, <span class="stringliteral">&quot;Unable to connect to NFC device.&quot;</span>);
<a name="l00107"></a>00107       <span class="keywordflow">return</span> 1;
<a name="l00108"></a>00108     }
<a name="l00109"></a>00109     <a class="code" href="nfc_8c.html#a1c05aadcf1b30e8d69969dfd74a793f2" title="Initialize NFC device as initiator (reader)">nfc_initiator_init</a> (pnd);
<a name="l00110"></a>00110 
<a name="l00111"></a>00111     <span class="comment">// Drop the field for a while</span>
<a name="l00112"></a>00112     <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="l00113"></a>00113       <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="l00114"></a>00114       exit (EXIT_FAILURE);
<a name="l00115"></a>00115     }
<a name="l00116"></a>00116     <span class="comment">// Let the reader only try once to find a tag</span>
<a name="l00117"></a>00117     <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#ab2cdef5e5ac453e9c60c9fe449cb311ead179fd877ff1ba540f0425fa3547825d">NDO_INFINITE_SELECT</a>, <span class="keyword">false</span>)) {
<a name="l00118"></a>00118       <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="l00119"></a>00119       exit (EXIT_FAILURE);
<a name="l00120"></a>00120     }
<a name="l00121"></a>00121     <span class="comment">// Enable field so more power consuming cards can power themselves up</span>
<a name="l00122"></a>00122     <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="l00123"></a>00123       <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="l00124"></a>00124       exit (EXIT_FAILURE);
<a name="l00125"></a>00125     }
<a name="l00126"></a>00126 
<a name="l00127"></a>00127     printf (<span class="stringliteral">&quot;Connected to NFC reader: %s\n&quot;</span>, pnd-&gt;<a class="code" href="structnfc__device__t.html#a3933f0bea196fedca0345a7f940dc85b">acName</a>);
<a name="l00128"></a>00128 
<a name="l00129"></a>00129     printf (<span class="stringliteral">&quot;PN532 will poll during %ld ms\n&quot;</span>, (<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span>) btPollNr * szModulations * btPeriod * 150);
<a name="l00130"></a>00130     res = <a class="code" href="nfc_8c.html#a2a5d72c36fbb65e208d7a38a0a7080d1" title="Polling for NFC targets.">nfc_initiator_poll_targets</a> (pnd, nmModulations, szModulations, btPollNr, btPeriod, antTargets, &amp;szTargetFound);
<a name="l00131"></a>00131     <span class="keywordflow">if</span> (res) {
<a name="l00132"></a>00132       uint8_t n;
<a name="l00133"></a>00133       printf (<span class="stringliteral">&quot;%ld target(s) have been found.\n&quot;</span>, (<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span>) szTargetFound);
<a name="l00134"></a>00134       <span class="keywordflow">for</span> (n = 0; n &lt; szTargetFound; n++) {
<a name="l00135"></a>00135         printf (<span class="stringliteral">&quot;T%d: &quot;</span>, n + 1);
<a name="l00136"></a>00136         print_nfc_target ( antTargets[n], verbose );
<a name="l00137"></a>00137 
<a name="l00138"></a>00138       }
<a name="l00139"></a>00139     } <span class="keywordflow">else</span> {
<a name="l00140"></a>00140       <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_initiator_poll_targets&quot;</span>);
<a name="l00141"></a>00141       <a class="code" href="nfc_8c.html#a442dc68878c3a0bb7e3293c8fd96afb0" title="Disconnect from a NFC device.">nfc_disconnect</a> (pnd);
<a name="l00142"></a>00142       exit (EXIT_FAILURE);
<a name="l00143"></a>00143     }
<a name="l00144"></a>00144     <a class="code" href="nfc_8c.html#a442dc68878c3a0bb7e3293c8fd96afb0" title="Disconnect from a NFC device.">nfc_disconnect</a> (pnd);
<a name="l00145"></a>00145   }
<a name="l00146"></a>00146 
<a name="l00147"></a>00147   free (pnddDevices);
<a name="l00148"></a>00148   <span class="keywordflow">return</span> 0;
<a name="l00149"></a>00149 }
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