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<h1>pn53x-sam.c</h1> </div>
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<a href="pn53x-sam_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) 2010, Emanuele Bertoldi</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 "AS IS"</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 "config.h"</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 <stdio.h></span>
<a name="l00040"></a>00040 <span class="preprocessor">#include <stdlib.h></span>
<a name="l00041"></a>00041 <span class="preprocessor">#include <time.h></span>
<a name="l00042"></a>00042
<a name="l00043"></a>00043 <span class="preprocessor">#ifndef _WIN32</span>
<a name="l00044"></a>00044 <span class="preprocessor"></span><span class="comment">// Needed by sleep() under Unix</span>
<a name="l00045"></a>00045 <span class="preprocessor"># include <unistd.h></span>
<a name="l00046"></a>00046 <span class="preprocessor"># define sleep sleep</span>
<a name="l00047"></a>00047 <span class="preprocessor"></span><span class="preprocessor"># define SUSP_TIME 1 // secs.</span>
<a name="l00048"></a>00048 <span class="preprocessor"></span><span class="preprocessor">#else</span>
<a name="l00049"></a>00049 <span class="preprocessor"></span><span class="comment">// Needed by Sleep() under Windows</span>
<a name="l00050"></a>00050 <span class="preprocessor"># include "../contrib/windows.h"</span>
<a name="l00051"></a>00051 <span class="preprocessor"># include <winbase.h></span>
<a name="l00052"></a>00052 <span class="preprocessor"># define sleep Sleep</span>
<a name="l00053"></a>00053 <span class="preprocessor"></span><span class="preprocessor"># define SUSP_TIME 1000 // msecs.</span>
<a name="l00054"></a>00054 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00055"></a>00055 <span class="preprocessor"></span>
<a name="l00056"></a>00056 <span class="preprocessor">#include <nfc/nfc.h></span>
<a name="l00057"></a>00057 <span class="preprocessor">#include <nfc/nfc-messages.h></span>
<a name="l00058"></a>00058 <span class="preprocessor">#include "<a class="code" href="nfc-utils_8h.html" title="Provide some examples shared functions like print, parity calculation, options parsing.">nfc-utils.h</a>"</span>
<a name="l00059"></a>00059
<a name="l00060"></a>00060 <span class="preprocessor">#include "chips/pn53x.h"</span>
<a name="l00061"></a>00061
<a name="l00062"></a>00062 <span class="preprocessor">#define MAX_FRAME_LEN 264</span>
<a name="l00063"></a>00063 <span class="preprocessor"></span><span class="preprocessor">#define TIMEOUT 60 // secs.</span>
<a name="l00064"></a>00064 <span class="preprocessor"></span>
<a name="l00065"></a>00065 <span class="preprocessor">#define NORMAL_MODE 1</span>
<a name="l00066"></a>00066 <span class="preprocessor"></span><span class="preprocessor">#define VIRTUAL_CARD_MODE 2</span>
<a name="l00067"></a>00067 <span class="preprocessor"></span><span class="preprocessor">#define WIRED_CARD_MODE 3</span>
<a name="l00068"></a>00068 <span class="preprocessor"></span><span class="preprocessor">#define DUAL_CARD_MODE 4</span>
<a name="l00069"></a>00069 <span class="preprocessor"></span>
<a name="l00070"></a>00070 <span class="keywordtype">bool</span>
<a name="l00071"></a>00071 sam_connection (<a class="code" href="structnfc__device__t.html" title="NFC device information.">nfc_device_t</a> * pnd, <span class="keywordtype">int</span> mode)
<a name="l00072"></a>00072 {
<a name="l00073"></a>00073 byte_t pncmd_sam_config[] = { 0xD4, 0x14, 0x00, 0x00 };
<a name="l00074"></a>00074 <span class="keywordtype">size_t</span> szCmd = 0;
<a name="l00075"></a>00075
<a name="l00076"></a>00076 byte_t abtRx[MAX_FRAME_LEN];
<a name="l00077"></a>00077 <span class="keywordtype">size_t</span> szRx;
<a name="l00078"></a>00078
<a name="l00079"></a>00079 pncmd_sam_config[2] = mode;
<a name="l00080"></a>00080
<a name="l00081"></a>00081 <span class="keywordflow">switch</span> (mode) {
<a name="l00082"></a>00082 <span class="keywordflow">case</span> VIRTUAL_CARD_MODE:
<a name="l00083"></a>00083 {
<a name="l00084"></a>00084 <span class="comment">// Only the VIRTUAL_CARD_MODE requires 4 bytes.</span>
<a name="l00085"></a>00085 szCmd = <span class="keyword">sizeof</span> (pncmd_sam_config);
<a name="l00086"></a>00086 }
<a name="l00087"></a>00087 <span class="keywordflow">break</span>;
<a name="l00088"></a>00088
<a name="l00089"></a>00089 <span class="keywordflow">default</span>:
<a name="l00090"></a>00090 {
<a name="l00091"></a>00091 szCmd = <span class="keyword">sizeof</span> (pncmd_sam_config) - 1;
<a name="l00092"></a>00092 }
<a name="l00093"></a>00093 <span class="keywordflow">break</span>;
<a name="l00094"></a>00094 }
<a name="l00095"></a>00095
<a name="l00096"></a>00096 <span class="keywordflow">if</span> (!pn53x_transceive (pnd, pncmd_sam_config, szCmd, abtRx, &szRx)) {
<a name="l00097"></a>00097 <a class="code" href="nfc_8c.html#a111b9182fc80b309b56009e9c6be7454" title="Display the PCD error a-la perror.">nfc_perror</a>(pnd, <span class="stringliteral">"pn53x_transceive"</span>);
<a name="l00098"></a>00098 ERR (<span class="stringliteral">"%s %d"</span>, <span class="stringliteral">"Unable to execute SAMConfiguration command with mode byte:"</span>, mode);
<a name="l00099"></a>00099 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00100"></a>00100 }
<a name="l00101"></a>00101
<a name="l00102"></a>00102 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00103"></a>00103 }
<a name="l00104"></a>00104
<a name="l00105"></a>00105 <span class="keywordtype">void</span>
<a name="l00106"></a>00106 wait_one_minute ()
<a name="l00107"></a>00107 {
<a name="l00108"></a>00108 <span class="keywordtype">int</span> secs = 0;
<a name="l00109"></a>00109
<a name="l00110"></a>00110 printf (<span class="stringliteral">"|"</span>);
<a name="l00111"></a>00111 fflush (stdout);
<a name="l00112"></a>00112
<a name="l00113"></a>00113 <span class="keywordflow">while</span> (secs < TIMEOUT) {
<a name="l00114"></a>00114 sleep (SUSP_TIME);
<a name="l00115"></a>00115 secs++;
<a name="l00116"></a>00116 printf (<span class="stringliteral">"."</span>);
<a name="l00117"></a>00117 fflush (stdout);
<a name="l00118"></a>00118 }
<a name="l00119"></a>00119
<a name="l00120"></a>00120 printf (<span class="stringliteral">"|\n"</span>);
<a name="l00121"></a>00121 }
<a name="l00122"></a>00122
<a name="l00123"></a>00123 <span class="keywordtype">int</span>
<a name="l00124"></a>00124 main (<span class="keywordtype">int</span> argc, <span class="keyword">const</span> <span class="keywordtype">char</span> *argv[])
<a name="l00125"></a>00125 {
<a name="l00126"></a>00126 <a class="code" href="structnfc__device__t.html" title="NFC device information.">nfc_device_t</a> *pnd;
<a name="l00127"></a>00127
<a name="l00128"></a>00128 (void) argc;
<a name="l00129"></a>00129 (void) argv;
<a name="l00130"></a>00130
<a name="l00131"></a>00131 <span class="comment">// Display libnfc version</span>
<a name="l00132"></a>00132 <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="l00133"></a>00133 printf (<span class="stringliteral">"%s use libnfc %s\n"</span>, argv[0], acLibnfcVersion);
<a name="l00134"></a>00134
<a name="l00135"></a>00135 <span class="comment">// Connect using the first available NFC device</span>
<a name="l00136"></a>00136 pnd = <a class="code" href="nfc_8c.html#aff0c2c92d2fc81e5dc93150fc72a7de6" title="Connect to a NFC device.">nfc_connect</a> (NULL);
<a name="l00137"></a>00137
<a name="l00138"></a>00138 <span class="keywordflow">if</span> (pnd == NULL) {
<a name="l00139"></a>00139 ERR (<span class="stringliteral">"%s"</span>, <span class="stringliteral">"Unable to connect to NFC device."</span>);
<a name="l00140"></a>00140 <span class="keywordflow">return</span> EXIT_FAILURE;
<a name="l00141"></a>00141 }
<a name="l00142"></a>00142
<a name="l00143"></a>00143 printf (<span class="stringliteral">"Connected to NFC device: %s\n"</span>, pnd-><a class="code" href="structnfc__device__t.html#a3933f0bea196fedca0345a7f940dc85b">acName</a>);
<a name="l00144"></a>00144
<a name="l00145"></a>00145 <span class="comment">// Print the example's menu</span>
<a name="l00146"></a>00146 printf (<span class="stringliteral">"\nSelect the communication mode:\n"</span>);
<a name="l00147"></a>00147 printf (<span class="stringliteral">"[1] Virtual card mode.\n"</span>);
<a name="l00148"></a>00148 printf (<span class="stringliteral">"[2] Wired card mode.\n"</span>);
<a name="l00149"></a>00149 printf (<span class="stringliteral">"[3] Dual card mode.\n"</span>);
<a name="l00150"></a>00150 printf (<span class="stringliteral">">> "</span>);
<a name="l00151"></a>00151
<a name="l00152"></a>00152 <span class="comment">// Take user's choice</span>
<a name="l00153"></a>00153 <span class="keywordtype">char</span> input = getchar ();
<a name="l00154"></a>00154 <span class="keywordtype">int</span> mode = input - <span class="charliteral">'0'</span> + 1;
<a name="l00155"></a>00155 printf (<span class="stringliteral">"\n"</span>);
<a name="l00156"></a>00156 <span class="keywordflow">if</span> (mode < VIRTUAL_CARD_MODE || mode > DUAL_CARD_MODE) {
<a name="l00157"></a>00157 ERR (<span class="stringliteral">"%s"</span>, <span class="stringliteral">"Invalid selection."</span>);
<a name="l00158"></a>00158 <span class="keywordflow">return</span> EXIT_FAILURE;
<a name="l00159"></a>00159 }
<a name="l00160"></a>00160 <span class="comment">// Connect with the SAM</span>
<a name="l00161"></a>00161 sam_connection (pnd, mode);
<a name="l00162"></a>00162
<a name="l00163"></a>00163 <span class="keywordflow">switch</span> (mode) {
<a name="l00164"></a>00164 <span class="keywordflow">case</span> VIRTUAL_CARD_MODE:
<a name="l00165"></a>00165 {
<a name="l00166"></a>00166 <span class="comment">// FIXME after the loop the device doesn't respond to host commands...</span>
<a name="l00167"></a>00167 printf (<span class="stringliteral">"Now the SAM is readable for 1 minute from an external reader.\n"</span>);
<a name="l00168"></a>00168 wait_one_minute ();
<a name="l00169"></a>00169 }
<a name="l00170"></a>00170 <span class="keywordflow">break</span>;
<a name="l00171"></a>00171
<a name="l00172"></a>00172 <span class="keywordflow">case</span> WIRED_CARD_MODE:
<a name="l00173"></a>00173 {
<a name="l00174"></a>00174 <a class="code" href="structnfc__target__t.html" title="NFC target structure.">nfc_target_t</a> nt;
<a name="l00175"></a>00175
<a name="l00176"></a>00176 <span class="comment">// Set connected NFC device to initiator mode</span>
<a name="l00177"></a>00177 <a class="code" href="nfc_8c.html#a1c05aadcf1b30e8d69969dfd74a793f2" title="Initialize NFC device as initiator (reader)">nfc_initiator_init</a> (pnd);
<a name="l00178"></a>00178
<a name="l00179"></a>00179 <span class="comment">// Drop the field for a while</span>
<a name="l00180"></a>00180 <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="l00181"></a>00181 <a class="code" href="nfc_8c.html#a111b9182fc80b309b56009e9c6be7454" title="Display the PCD error a-la perror.">nfc_perror</a> (pnd, <span class="stringliteral">"nfc_configure"</span>);
<a name="l00182"></a>00182 exit (EXIT_FAILURE);
<a name="l00183"></a>00183 }
<a name="l00184"></a>00184 <span class="comment">// Let the reader only try once to find a tag</span>
<a name="l00185"></a>00185 <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="l00186"></a>00186 <a class="code" href="nfc_8c.html#a111b9182fc80b309b56009e9c6be7454" title="Display the PCD error a-la perror.">nfc_perror</a> (pnd, <span class="stringliteral">"nfc_configure"</span>);
<a name="l00187"></a>00187 exit (EXIT_FAILURE);
<a name="l00188"></a>00188 }
<a name="l00189"></a>00189 <span class="comment">// Enable field so more power consuming cards can power themselves up</span>
<a name="l00190"></a>00190 <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="l00191"></a>00191 <a class="code" href="nfc_8c.html#a111b9182fc80b309b56009e9c6be7454" title="Display the PCD error a-la perror.">nfc_perror</a> (pnd, <span class="stringliteral">"nfc_configure"</span>);
<a name="l00192"></a>00192 exit (EXIT_FAILURE);
<a name="l00193"></a>00193 }
<a name="l00194"></a>00194 <span class="comment">// Read the SAM's info</span>
<a name="l00195"></a>00195 <span class="keyword">const</span> <a class="code" href="structnfc__modulation__t.html" title="NFC modulation structure.">nfc_modulation_t</a> nmSAM = {
<a name="l00196"></a>00196 .nmt = NMT_ISO14443A,
<a name="l00197"></a>00197 .nbr = NBR_106,
<a name="l00198"></a>00198 };
<a name="l00199"></a>00199 <span class="keywordflow">if</span> (!<a class="code" href="nfc_8c.html#acff0e43e51d7a2c8d750d09fa5265e16" title="Select a passive or emulated tag.">nfc_initiator_select_passive_target</a> (pnd, nmSAM, NULL, 0, &nt)) {
<a name="l00200"></a>00200 <a class="code" href="nfc_8c.html#a111b9182fc80b309b56009e9c6be7454" title="Display the PCD error a-la perror.">nfc_perror</a> (pnd, <span class="stringliteral">"nfc_initiator_select_passive_target"</span>);
<a name="l00201"></a>00201 ERR (<span class="stringliteral">"%s"</span>, <span class="stringliteral">"Reading of SAM info failed."</span>);
<a name="l00202"></a>00202 <span class="keywordflow">return</span> EXIT_FAILURE;
<a name="l00203"></a>00203 }
<a name="l00204"></a>00204
<a name="l00205"></a>00205 printf (<span class="stringliteral">"The following ISO14443A tag (SAM) was found:\n\n"</span>);
<a name="l00206"></a>00206 print_nfc_iso14443a_info (nt.nti.nai, <span class="keyword">true</span>);
<a name="l00207"></a>00207 }
<a name="l00208"></a>00208 <span class="keywordflow">break</span>;
<a name="l00209"></a>00209
<a name="l00210"></a>00210 <span class="keywordflow">case</span> DUAL_CARD_MODE:
<a name="l00211"></a>00211 {
<a name="l00212"></a>00212 byte_t abtRx[MAX_FRAME_LEN];
<a name="l00213"></a>00213 <span class="keywordtype">size_t</span> szRx;
<a name="l00214"></a>00214
<a name="l00215"></a>00215 <a class="code" href="structnfc__target__t.html" title="NFC target structure.">nfc_target_t</a> nt = {
<a name="l00216"></a>00216 .nm.nmt = NMT_ISO14443A,
<a name="l00217"></a>00217 .nm.nbr = NBR_UNDEFINED,
<a name="l00218"></a>00218 .nti.nai.abtAtqa = { 0x04, 0x00 },
<a name="l00219"></a>00219 .nti.nai.abtUid = { 0x08, 0xad, 0xbe, 0xef },
<a name="l00220"></a>00220 .nti.nai.btSak = 0x20,
<a name="l00221"></a>00221 .nti.nai.szUidLen = 4,
<a name="l00222"></a>00222 .nti.nai.szAtsLen = 0,
<a name="l00223"></a>00223 };
<a name="l00224"></a>00224 printf (<span class="stringliteral">"Now both, NFC device (configured as target) and SAM are readables from an external NFC initiator.\n"</span>);
<a name="l00225"></a>00225 printf (<span class="stringliteral">"Please note that NFC device (configured as target) stay in target mode until it receive RATS, ATR_REQ or proprietary command.\n"</span>);
<a name="l00226"></a>00226 <span class="keywordflow">if</span> (!<a class="code" href="nfc_8c.html#a2e021479b99fbd60cf5f037b2daa3007" title="Initialize NFC device as an emulated tag.">nfc_target_init</a> (pnd, &nt, abtRx, &szRx)) {
<a name="l00227"></a>00227 <a class="code" href="nfc_8c.html#a111b9182fc80b309b56009e9c6be7454" title="Display the PCD error a-la perror.">nfc_perror</a>(pnd, <span class="stringliteral">"nfc_target_init"</span>);
<a name="l00228"></a>00228 <span class="keywordflow">return</span> EXIT_FAILURE;
<a name="l00229"></a>00229 }
<a name="l00230"></a>00230 <span class="comment">// wait_one_minute ();</span>
<a name="l00231"></a>00231 }
<a name="l00232"></a>00232 <span class="keywordflow">break</span>;
<a name="l00233"></a>00233 }
<a name="l00234"></a>00234
<a name="l00235"></a>00235 <span class="comment">// Disconnect from the SAM</span>
<a name="l00236"></a>00236 sam_connection (pnd, NORMAL_MODE);
<a name="l00237"></a>00237
<a name="l00238"></a>00238 <span class="comment">// Disconnect from NFC device</span>
<a name="l00239"></a>00239 <a class="code" href="nfc_8c.html#a442dc68878c3a0bb7e3293c8fd96afb0" title="Disconnect from a NFC device.">nfc_disconnect</a> (pnd);
<a name="l00240"></a>00240
<a name="l00241"></a>00241 <span class="keywordflow">return</span> EXIT_SUCCESS;
<a name="l00242"></a>00242 }
</pre></div></div>
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