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<h1>acr122.c</h1> </div>
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<a href="acr122_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</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"> * This program is free software: you can redistribute it and/or modify it</span>
<a name="l00007"></a>00007 <span class="comment"> * under the terms of the GNU Lesser General Public License as published by the</span>
<a name="l00008"></a>00008 <span class="comment"> * Free Software Foundation, either version 3 of the License, or (at your</span>
<a name="l00009"></a>00009 <span class="comment"> * option) any later version.</span>
<a name="l00010"></a>00010 <span class="comment"> * </span>
<a name="l00011"></a>00011 <span class="comment"> * This program is distributed in the hope that it will be useful, but WITHOUT</span>
<a name="l00012"></a>00012 <span class="comment"> * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or</span>
<a name="l00013"></a>00013 <span class="comment"> * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for</span>
<a name="l00014"></a>00014 <span class="comment"> * more details.</span>
<a name="l00015"></a>00015 <span class="comment"> *</span>
<a name="l00016"></a>00016 <span class="comment"> * You should have received a copy of the GNU Lesser General Public License</span>
<a name="l00017"></a>00017 <span class="comment"> * along with this program. If not, see <http://www.gnu.org/licenses/></span>
<a name="l00018"></a>00018 <span class="comment"> */</span>
<a name="l00019"></a>00019
<a name="l00025"></a>00025 <span class="preprocessor">#ifdef HAVE_CONFIG_H</span>
<a name="l00026"></a>00026 <span class="preprocessor"></span><span class="preprocessor"># include "config.h"</span>
<a name="l00027"></a>00027 <span class="preprocessor">#endif // HAVE_CONFIG_H</span>
<a name="l00028"></a>00028 <span class="preprocessor"></span>
<a name="l00029"></a>00029 <span class="preprocessor">#include <stdio.h></span>
<a name="l00030"></a>00030 <span class="preprocessor">#include <stdlib.h></span>
<a name="l00031"></a>00031 <span class="preprocessor">#include <stddef.h></span>
<a name="l00032"></a>00032 <span class="preprocessor">#include <string.h></span>
<a name="l00033"></a>00033
<a name="l00034"></a>00034 <span class="preprocessor">#include "<a class="code" href="acr122_8h.html">acr122.h</a>"</span>
<a name="l00035"></a>00035 <span class="preprocessor">#include "<a class="code" href="drivers_8h.html" title="Supported drivers header.">../drivers.h</a>"</span>
<a name="l00036"></a>00036
<a name="l00037"></a>00037 <span class="comment">// Bus</span>
<a name="l00038"></a>00038 <span class="preprocessor">#include <winscard.h></span>
<a name="l00039"></a>00039
<a name="l00040"></a>00040 <span class="comment">// XXX: Some review from users cross-compiling is welcome!</span>
<a name="l00041"></a>00041 <span class="preprocessor">#if defined (_WIN32)</span>
<a name="l00042"></a>00042 <span class="preprocessor"></span><span class="preprocessor"># define IOCTL_CCID_ESCAPE_SCARD_CTL_CODE SCARD_CTL_CODE(3500)</span>
<a name="l00043"></a>00043 <span class="preprocessor"></span><span class="preprocessor">#elif defined(__APPLE__)</span>
<a name="l00044"></a>00044 <span class="preprocessor"></span><span class="preprocessor"># include <wintypes.h></span>
<a name="l00045"></a>00045 <span class="preprocessor"># define IOCTL_CCID_ESCAPE_SCARD_CTL_CODE (((0x31) << 16) | ((3500) << 2))</span>
<a name="l00046"></a>00046 <span class="preprocessor"></span><span class="preprocessor">#elif defined (__FreeBSD__) || defined (__OpenBSD__)</span>
<a name="l00047"></a>00047 <span class="preprocessor"></span><span class="preprocessor"># define IOCTL_CCID_ESCAPE_SCARD_CTL_CODE (((0x31) << 16) | ((3500) << 2))</span>
<a name="l00048"></a>00048 <span class="preprocessor"></span><span class="preprocessor">#elif defined (__linux__)</span>
<a name="l00049"></a>00049 <span class="preprocessor"></span><span class="preprocessor"># include <reader.h></span>
<a name="l00050"></a>00050 <span class="comment">// Escape IOCTL tested successfully:</span>
<a name="l00051"></a>00051 <span class="preprocessor"># define IOCTL_CCID_ESCAPE_SCARD_CTL_CODE SCARD_CTL_CODE(1)</span>
<a name="l00052"></a>00052 <span class="preprocessor"></span><span class="preprocessor">#else</span>
<a name="l00053"></a>00053 <span class="preprocessor"></span><span class="preprocessor"># error "Can't determine serial string for your system"</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
<a name="l00059"></a>00059 <span class="preprocessor">#define SCARD_OPERATION_SUCCESS 0x61</span>
<a name="l00060"></a>00060 <span class="preprocessor"></span><span class="preprocessor">#define SCARD_OPERATION_ERROR 0x63</span>
<a name="l00061"></a>00061 <span class="preprocessor"></span>
<a name="l00062"></a>00062 <span class="preprocessor">#ifndef SCARD_PROTOCOL_UNDEFINED</span>
<a name="l00063"></a>00063 <span class="preprocessor"></span><span class="preprocessor"># define SCARD_PROTOCOL_UNDEFINED SCARD_PROTOCOL_UNSET</span>
<a name="l00064"></a>00064 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00065"></a>00065 <span class="preprocessor"></span>
<a name="l00066"></a>00066 <span class="preprocessor">#define FIRMWARE_TEXT "ACR122U" // Tested on: ACR122U101(ACS), ACR122U102(Tikitag), ACR122U203(ACS)</span>
<a name="l00067"></a>00067 <span class="preprocessor"></span>
<a name="l00068"></a>00068 <span class="preprocessor">#define ACR122_WRAP_LEN 5</span>
<a name="l00069"></a>00069 <span class="preprocessor"></span><span class="preprocessor">#define ACR122_COMMAND_LEN 266</span>
<a name="l00070"></a>00070 <span class="preprocessor"></span><span class="preprocessor">#define ACR122_RESPONSE_LEN 268</span>
<a name="l00071"></a>00071 <span class="preprocessor"></span>
<a name="l00072"></a>00072 <span class="keyword">const</span> <span class="keywordtype">char</span> *supported_devices[] = {
<a name="l00073"></a>00073 <span class="stringliteral">"ACS ACR122"</span>, <span class="comment">// ACR122U & Touchatag, last version</span>
<a name="l00074"></a>00074 <span class="stringliteral">"ACS ACR 38U-CCID"</span>, <span class="comment">// Touchatag, early version</span>
<a name="l00075"></a>00075 <span class="stringliteral">"ACS ACR38U-CCID"</span>, <span class="comment">// Touchatag, early version, under MacOSX</span>
<a name="l00076"></a>00076 <span class="stringliteral">" CCID USB"</span>, <span class="comment">// ??</span>
<a name="l00077"></a>00077 NULL
<a name="l00078"></a>00078 };
<a name="l00079"></a>00079
<a name="l00080"></a>00080 <span class="keyword">typedef</span> <span class="keyword">struct </span>{
<a name="l00081"></a>00081 SCARDHANDLE hCard;
<a name="l00082"></a>00082 SCARD_IO_REQUEST ioCard;
<a name="l00083"></a>00083 } acr122_spec_t;
<a name="l00084"></a>00084
<a name="l00085"></a>00085 <span class="keyword">static</span> SCARDCONTEXT _SCardContext;
<a name="l00086"></a>00086 <span class="keyword">static</span> <span class="keywordtype">int</span> _iSCardContextRefCount = 0;
<a name="l00087"></a>00087
<a name="l00088"></a>00088 SCARDCONTEXT *
<a name="l00089"></a>00089 acr122_get_scardcontext (<span class="keywordtype">void</span>)
<a name="l00090"></a>00090 {
<a name="l00091"></a>00091 <span class="keywordflow">if</span> (_iSCardContextRefCount == 0) {
<a name="l00092"></a>00092 <span class="keywordflow">if</span> (SCardEstablishContext (SCARD_SCOPE_USER, NULL, NULL, &_SCardContext) != SCARD_S_SUCCESS)
<a name="l00093"></a>00093 <span class="keywordflow">return</span> NULL;
<a name="l00094"></a>00094 }
<a name="l00095"></a>00095 _iSCardContextRefCount++;
<a name="l00096"></a>00096
<a name="l00097"></a>00097 <span class="keywordflow">return</span> &_SCardContext;
<a name="l00098"></a>00098 }
<a name="l00099"></a>00099
<a name="l00100"></a>00100 <span class="keywordtype">void</span>
<a name="l00101"></a>00101 acr122_free_scardcontext (<span class="keywordtype">void</span>)
<a name="l00102"></a>00102 {
<a name="l00103"></a>00103 <span class="keywordflow">if</span> (_iSCardContextRefCount) {
<a name="l00104"></a>00104 _iSCardContextRefCount--;
<a name="l00105"></a>00105 <span class="keywordflow">if</span> (!_iSCardContextRefCount) {
<a name="l00106"></a>00106 SCardReleaseContext (_SCardContext);
<a name="l00107"></a>00107 }
<a name="l00108"></a>00108 }
<a name="l00109"></a>00109 }
<a name="l00110"></a>00110
<a name="l00111"></a>00111
<a name="l00112"></a>00112 <a class="code" href="structnfc__device__desc__t.html" title="NFC device description.">nfc_device_desc_t</a> *
<a name="l00113"></a>00113 acr122_pick_device (<span class="keywordtype">void</span>)
<a name="l00114"></a>00114 {
<a name="l00115"></a>00115 <a class="code" href="structnfc__device__desc__t.html" title="NFC device description.">nfc_device_desc_t</a> *pndd;
<a name="l00116"></a>00116
<a name="l00117"></a>00117 <span class="keywordflow">if</span> ((pndd = malloc (<span class="keyword">sizeof</span> (*pndd)))) {
<a name="l00118"></a>00118 <span class="keywordtype">size_t</span> szN;
<a name="l00119"></a>00119
<a name="l00120"></a>00120 <span class="keywordflow">if</span> (!<a class="code" href="acr122_8c.html#adc85ab1dd678e181048fa7292d880251" title="List connected devices.">acr122_list_devices</a> (pndd, 1, &szN)) {
<a name="l00121"></a>00121 DBG (<span class="stringliteral">"%s"</span>, <span class="stringliteral">"acr122_list_devices failed"</span>);
<a name="l00122"></a>00122 free (pndd);
<a name="l00123"></a>00123 <span class="keywordflow">return</span> NULL;
<a name="l00124"></a>00124 }
<a name="l00125"></a>00125
<a name="l00126"></a>00126 <span class="keywordflow">if</span> (szN == 0) {
<a name="l00127"></a>00127 DBG (<span class="stringliteral">"%s"</span>, <span class="stringliteral">"No device found"</span>);
<a name="l00128"></a>00128 free (pndd);
<a name="l00129"></a>00129 <span class="keywordflow">return</span> NULL;
<a name="l00130"></a>00130 }
<a name="l00131"></a>00131 }
<a name="l00132"></a>00132
<a name="l00133"></a>00133 <span class="keywordflow">return</span> pndd;
<a name="l00134"></a>00134 }
<a name="l00135"></a>00135
<a name="l00146"></a>00146 <span class="keywordtype">bool</span>
<a name="l00147"></a><a class="code" href="acr122_8h.html#adc85ab1dd678e181048fa7292d880251">00147</a> <a class="code" href="acr122_8c.html#adc85ab1dd678e181048fa7292d880251" title="List connected devices.">acr122_list_devices</a> (<a class="code" href="structnfc__device__desc__t.html" title="NFC device description.">nfc_device_desc_t</a> pnddDevices[], <span class="keywordtype">size_t</span> szDevices, <span class="keywordtype">size_t</span> * pszDeviceFound)
<a name="l00148"></a>00148 {
<a name="l00149"></a>00149 <span class="keywordtype">size_t</span> szPos = 0;
<a name="l00150"></a>00150 <span class="keywordtype">char</span> acDeviceNames[256 + 64 * DRIVERS_MAX_DEVICES];
<a name="l00151"></a>00151 <span class="keywordtype">size_t</span> szDeviceNamesLen = <span class="keyword">sizeof</span> (acDeviceNames);
<a name="l00152"></a>00152 uint32_t uiBusIndex = 0;
<a name="l00153"></a>00153 SCARDCONTEXT *pscc;
<a name="l00154"></a>00154 <span class="keywordtype">bool</span> bSupported;
<a name="l00155"></a>00155 <span class="keywordtype">int</span> i;
<a name="l00156"></a>00156
<a name="l00157"></a>00157 <span class="comment">// Clear the reader list</span>
<a name="l00158"></a>00158 memset (acDeviceNames, <span class="charliteral">'\0'</span>, szDeviceNamesLen);
<a name="l00159"></a>00159
<a name="l00160"></a>00160 *pszDeviceFound = 0;
<a name="l00161"></a>00161
<a name="l00162"></a>00162 <span class="comment">// Test if context succeeded</span>
<a name="l00163"></a>00163 <span class="keywordflow">if</span> (!(pscc = acr122_get_scardcontext ())) {
<a name="l00164"></a>00164 DBG (<span class="stringliteral">"%s"</span>, <span class="stringliteral">"PCSC context not found"</span>);
<a name="l00165"></a>00165 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00166"></a>00166 }
<a name="l00167"></a>00167 <span class="comment">// Retrieve the string array of all available pcsc readers</span>
<a name="l00168"></a>00168 <span class="keywordflow">if</span> (SCardListReaders (*pscc, NULL, acDeviceNames, (<span class="keywordtype">void</span> *) &szDeviceNamesLen) != SCARD_S_SUCCESS)
<a name="l00169"></a>00169 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00170"></a>00170
<a name="l00171"></a>00171 <span class="comment">// DBG("%s", "PCSC reports following device(s):");</span>
<a name="l00172"></a>00172
<a name="l00173"></a>00173 <span class="keywordflow">while</span> ((acDeviceNames[szPos] != <span class="charliteral">'\0'</span>) && ((*pszDeviceFound) < szDevices)) {
<a name="l00174"></a>00174 uiBusIndex++;
<a name="l00175"></a>00175
<a name="l00176"></a>00176 <span class="comment">// DBG("- %s (pos=%ld)", acDeviceNames + szPos, (unsigned long) szPos);</span>
<a name="l00177"></a>00177
<a name="l00178"></a>00178 bSupported = <span class="keyword">false</span>;
<a name="l00179"></a>00179 <span class="keywordflow">for</span> (i = 0; supported_devices[i] && !bSupported; i++) {
<a name="l00180"></a>00180 <span class="keywordtype">int</span> l = strlen (supported_devices[i]);
<a name="l00181"></a>00181 bSupported = 0 == strncmp (supported_devices[i], acDeviceNames + szPos, l);
<a name="l00182"></a>00182 }
<a name="l00183"></a>00183
<a name="l00184"></a>00184 <span class="keywordflow">if</span> (bSupported) {
<a name="l00185"></a>00185 <span class="comment">// Supported ACR122 device found</span>
<a name="l00186"></a>00186 strncpy (pnddDevices[*pszDeviceFound].acDevice, acDeviceNames + szPos, DEVICE_NAME_LENGTH - 1);
<a name="l00187"></a>00187 pnddDevices[*pszDeviceFound].<a class="code" href="structnfc__device__desc__t.html#a4ef2a14ef0b858ee15f40feba9270df0">acDevice</a>[DEVICE_NAME_LENGTH - 1] = <span class="charliteral">'\0'</span>;
<a name="l00188"></a>00188 pnddDevices[*pszDeviceFound].<a class="code" href="structnfc__device__desc__t.html#abbe6b78fa97f57c5a240317a34a990bd">pcDriver</a> = ACR122_DRIVER_NAME;
<a name="l00189"></a>00189 pnddDevices[*pszDeviceFound].<a class="code" href="structnfc__device__desc__t.html#af2fe0f75c77c5e454486be619423c5d9">uiBusIndex</a> = uiBusIndex;
<a name="l00190"></a>00190 (*pszDeviceFound)++;
<a name="l00191"></a>00191 } <span class="keywordflow">else</span> {
<a name="l00192"></a>00192 DBG (<span class="stringliteral">"PCSC device [%s] is not NFC capable or not supported by libnfc."</span>, acDeviceNames + szPos);
<a name="l00193"></a>00193 }
<a name="l00194"></a>00194
<a name="l00195"></a>00195 <span class="comment">// Find next device name position</span>
<a name="l00196"></a>00196 <span class="keywordflow">while</span> (acDeviceNames[szPos++] != <span class="charliteral">'\0'</span>);
<a name="l00197"></a>00197 }
<a name="l00198"></a>00198 acr122_free_scardcontext ();
<a name="l00199"></a>00199
<a name="l00200"></a>00200 <span class="keywordflow">if</span> (*pszDeviceFound)
<a name="l00201"></a>00201 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00202"></a>00202 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00203"></a>00203 }
<a name="l00204"></a>00204
<a name="l00205"></a>00205 <a class="code" href="structnfc__device__t.html" title="NFC device information.">nfc_device_t</a> *
<a name="l00206"></a>00206 acr122_connect (<span class="keyword">const</span> <a class="code" href="structnfc__device__desc__t.html" title="NFC device description.">nfc_device_desc_t</a> * pndd)
<a name="l00207"></a>00207 {
<a name="l00208"></a>00208 <a class="code" href="structnfc__device__t.html" title="NFC device information.">nfc_device_t</a> *pnd = NULL;
<a name="l00209"></a>00209 acr122_spec_t as;
<a name="l00210"></a>00210 acr122_spec_t *pas;
<a name="l00211"></a>00211 <span class="keywordtype">char</span> *pcFirmware;
<a name="l00212"></a>00212
<a name="l00213"></a>00213 SCARDCONTEXT *pscc;
<a name="l00214"></a>00214
<a name="l00215"></a>00215 DBG (<span class="stringliteral">"Attempt to connect to %s"</span>, pndd-><a class="code" href="structnfc__device__desc__t.html#a4ef2a14ef0b858ee15f40feba9270df0">acDevice</a>);
<a name="l00216"></a>00216 <span class="comment">// Test if context succeeded</span>
<a name="l00217"></a>00217 <span class="keywordflow">if</span> (!(pscc = acr122_get_scardcontext ()))
<a name="l00218"></a>00218 <span class="keywordflow">return</span> NULL;
<a name="l00219"></a>00219 <span class="comment">// Test if we were able to connect to the "emulator" card</span>
<a name="l00220"></a>00220 <span class="keywordflow">if</span> (SCardConnect (*pscc, pndd-><a class="code" href="structnfc__device__desc__t.html#a4ef2a14ef0b858ee15f40feba9270df0">acDevice</a>, SCARD_SHARE_EXCLUSIVE, SCARD_PROTOCOL_T0 | SCARD_PROTOCOL_T1, &(as.hCard), (<span class="keywordtype">void</span> *) &(as.ioCard.dwProtocol)) != SCARD_S_SUCCESS) {
<a name="l00221"></a>00221 <span class="comment">// Connect to ACR122 firmware version >2.0</span>
<a name="l00222"></a>00222 <span class="keywordflow">if</span> (SCardConnect (*pscc, pndd-><a class="code" href="structnfc__device__desc__t.html#a4ef2a14ef0b858ee15f40feba9270df0">acDevice</a>, SCARD_SHARE_DIRECT, 0, &(as.hCard), (<span class="keywordtype">void</span> *) &(as.ioCard.dwProtocol)) != SCARD_S_SUCCESS) {
<a name="l00223"></a>00223 <span class="comment">// We can not connect to this device.</span>
<a name="l00224"></a>00224 DBG (<span class="stringliteral">"%s"</span>, <span class="stringliteral">"PCSC connect failed"</span>);
<a name="l00225"></a>00225 <span class="keywordflow">return</span> NULL;
<a name="l00226"></a>00226 }
<a name="l00227"></a>00227 }
<a name="l00228"></a>00228 <span class="comment">// Configure I/O settings for card communication</span>
<a name="l00229"></a>00229 as.ioCard.cbPciLength = <span class="keyword">sizeof</span> (SCARD_IO_REQUEST);
<a name="l00230"></a>00230
<a name="l00231"></a>00231 <span class="comment">// Retrieve the current firmware version</span>
<a name="l00232"></a>00232 pcFirmware = acr122_firmware ((<a class="code" href="structnfc__device__t.html" title="NFC device information.">nfc_device_t</a> *) & as);
<a name="l00233"></a>00233 <span class="keywordflow">if</span> (strstr (pcFirmware, FIRMWARE_TEXT) != NULL) {
<a name="l00234"></a>00234 <span class="comment">// Allocate memory and store the device specification</span>
<a name="l00235"></a>00235 pas = malloc (<span class="keyword">sizeof</span> (acr122_spec_t));
<a name="l00236"></a>00236 *pas = as;
<a name="l00237"></a>00237
<a name="l00238"></a>00238 <span class="comment">// Done, we found the reader we are looking for</span>
<a name="l00239"></a>00239 pnd = malloc (<span class="keyword">sizeof</span> (<a class="code" href="structnfc__device__t.html" title="NFC device information.">nfc_device_t</a>));
<a name="l00240"></a>00240 strcpy (pnd-><a class="code" href="structnfc__device__t.html#a3933f0bea196fedca0345a7f940dc85b">acName</a>, pndd-><a class="code" href="structnfc__device__desc__t.html#a4ef2a14ef0b858ee15f40feba9270df0">acDevice</a>);
<a name="l00241"></a>00241 strcpy (pnd-><a class="code" href="structnfc__device__t.html#a3933f0bea196fedca0345a7f940dc85b">acName</a> + strlen (pnd-><a class="code" href="structnfc__device__t.html#a3933f0bea196fedca0345a7f940dc85b">acName</a>), <span class="stringliteral">" / "</span>);
<a name="l00242"></a>00242 strcpy (pnd-><a class="code" href="structnfc__device__t.html#a3933f0bea196fedca0345a7f940dc85b">acName</a> + strlen (pnd-><a class="code" href="structnfc__device__t.html#a3933f0bea196fedca0345a7f940dc85b">acName</a>), pcFirmware);
<a name="l00243"></a>00243 pnd-><a class="code" href="structnfc__device__t.html#ac38d710f875a0ffbee062569f513dfff">nc</a> = NC_PN532;
<a name="l00244"></a>00244 pnd-><a class="code" href="structnfc__device__t.html#a2cef5cf7a0f7590c2398bac39bef7bee">nds</a> = (nfc_device_spec_t) pas;
<a name="l00245"></a>00245 pnd-><a class="code" href="structnfc__device__t.html#ae89fdb258019e1c68073c31acc8a1367">bActive</a> = <span class="keyword">true</span>;
<a name="l00246"></a>00246
<a name="l00247"></a>00247 <span class="keywordflow">return</span> pnd;
<a name="l00248"></a>00248 }
<a name="l00249"></a>00249
<a name="l00250"></a>00250 <span class="keywordflow">return</span> NULL;
<a name="l00251"></a>00251 }
<a name="l00252"></a>00252
<a name="l00253"></a>00253 <span class="keywordtype">void</span>
<a name="l00254"></a>00254 acr122_disconnect (<a class="code" href="structnfc__device__t.html" title="NFC device information.">nfc_device_t</a> * pnd)
<a name="l00255"></a>00255 {
<a name="l00256"></a>00256 acr122_spec_t *pas = (acr122_spec_t *) pnd-><a class="code" href="structnfc__device__t.html#a2cef5cf7a0f7590c2398bac39bef7bee">nds</a>;
<a name="l00257"></a>00257 SCardDisconnect (pas->hCard, SCARD_LEAVE_CARD);
<a name="l00258"></a>00258 acr122_free_scardcontext ();
<a name="l00259"></a>00259 free (pas);
<a name="l00260"></a>00260 free (pnd);
<a name="l00261"></a>00261 }
<a name="l00262"></a>00262
<a name="l00263"></a>00263 <span class="keywordtype">bool</span>
<a name="l00264"></a>00264 acr122_transceive (<a class="code" href="structnfc__device__t.html" title="NFC device information.">nfc_device_t</a> * pnd, <span class="keyword">const</span> byte_t * pbtTx, <span class="keyword">const</span> <span class="keywordtype">size_t</span> szTx, byte_t * pbtRx, <span class="keywordtype">size_t</span> * pszRx)
<a name="l00265"></a>00265 {
<a name="l00266"></a>00266 byte_t abtRxCmd[5] = { 0xFF, 0xC0, 0x00, 0x00 };
<a name="l00267"></a>00267 <span class="keywordtype">size_t</span> szRxCmdLen = <span class="keyword">sizeof</span> (abtRxCmd);
<a name="l00268"></a>00268 byte_t abtRxBuf[ACR122_RESPONSE_LEN];
<a name="l00269"></a>00269 <span class="keywordtype">size_t</span> szRxBufLen;
<a name="l00270"></a>00270 byte_t abtTxBuf[ACR122_WRAP_LEN + ACR122_COMMAND_LEN] = { 0xFF, 0x00, 0x00, 0x00 };
<a name="l00271"></a>00271 acr122_spec_t *pas = (acr122_spec_t *) pnd-><a class="code" href="structnfc__device__t.html#a2cef5cf7a0f7590c2398bac39bef7bee">nds</a>;
<a name="l00272"></a>00272
<a name="l00273"></a>00273 <span class="comment">// FIXME: Should be handled by the library.</span>
<a name="l00274"></a>00274 <span class="comment">// Make sure the command does not overflow the send buffer</span>
<a name="l00275"></a>00275 if (szTx > ACR122_COMMAND_LEN) {
<a name="l00276"></a>00276 pnd-><a class="code" href="structnfc__device__t.html#a3cc2631649285ff97395e20d8abd1e6f">iLastError</a> = DEIO;
<a name="l00277"></a>00277 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00278"></a>00278 }
<a name="l00279"></a>00279 <span class="comment">// Store the length of the command we are going to send</span>
<a name="l00280"></a>00280 abtTxBuf[4] = szTx;
<a name="l00281"></a>00281
<a name="l00282"></a>00282 <span class="comment">// Prepare and transmit the send buffer</span>
<a name="l00283"></a>00283 memcpy (abtTxBuf + 5, pbtTx, szTx);
<a name="l00284"></a>00284 szRxBufLen = <span class="keyword">sizeof</span> (abtRxBuf);
<a name="l00285"></a>00285 <span class="preprocessor">#ifdef DEBUG</span>
<a name="l00286"></a>00286 <span class="preprocessor"></span> PRINT_HEX (<span class="stringliteral">"TX"</span>, abtTxBuf, szTx + 5);
<a name="l00287"></a>00287 <span class="preprocessor">#endif</span>
<a name="l00288"></a>00288 <span class="preprocessor"></span>
<a name="l00289"></a>00289 <span class="keywordflow">if</span> (pas->ioCard.dwProtocol == SCARD_PROTOCOL_UNDEFINED) {
<a name="l00290"></a>00290 <span class="keywordflow">if</span> (SCardControl
<a name="l00291"></a>00291 (pas->hCard, IOCTL_CCID_ESCAPE_SCARD_CTL_CODE, abtTxBuf, szTx + 5, abtRxBuf, szRxBufLen,
<a name="l00292"></a>00292 (<span class="keywordtype">void</span> *) &szRxBufLen) != SCARD_S_SUCCESS) {
<a name="l00293"></a>00293 pnd-><a class="code" href="structnfc__device__t.html#a3cc2631649285ff97395e20d8abd1e6f">iLastError</a> = DEIO;
<a name="l00294"></a>00294 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00295"></a>00295 }
<a name="l00296"></a>00296 } <span class="keywordflow">else</span> {
<a name="l00297"></a>00297 <span class="keywordflow">if</span> (SCardTransmit (pas->hCard, &(pas->ioCard), abtTxBuf, szTx + 5, NULL, abtRxBuf, (<span class="keywordtype">void</span> *) &szRxBufLen) !=
<a name="l00298"></a>00298 SCARD_S_SUCCESS) {
<a name="l00299"></a>00299 pnd-><a class="code" href="structnfc__device__t.html#a3cc2631649285ff97395e20d8abd1e6f">iLastError</a> = DEIO;
<a name="l00300"></a>00300 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00301"></a>00301 }
<a name="l00302"></a>00302 }
<a name="l00303"></a>00303
<a name="l00304"></a>00304 <span class="keywordflow">if</span> (pas->ioCard.dwProtocol == SCARD_PROTOCOL_T0) {
<a name="l00305"></a>00305 <span class="comment">// Make sure we received the byte-count we expected</span>
<a name="l00306"></a>00306 <span class="keywordflow">if</span> (szRxBufLen != 2) {
<a name="l00307"></a>00307 pnd-><a class="code" href="structnfc__device__t.html#a3cc2631649285ff97395e20d8abd1e6f">iLastError</a> = DEIO;
<a name="l00308"></a>00308 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00309"></a>00309 }
<a name="l00310"></a>00310 <span class="comment">// Check if the operation was successful, so an answer is available</span>
<a name="l00311"></a>00311 <span class="keywordflow">if</span> (*abtRxBuf == SCARD_OPERATION_ERROR) {
<a name="l00312"></a>00312 pnd-><a class="code" href="structnfc__device__t.html#a3cc2631649285ff97395e20d8abd1e6f">iLastError</a> = DEISERRFRAME;
<a name="l00313"></a>00313 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00314"></a>00314 }
<a name="l00315"></a>00315 <span class="comment">// Retrieve the response bytes</span>
<a name="l00316"></a>00316 abtRxCmd[4] = abtRxBuf[1];
<a name="l00317"></a>00317 szRxBufLen = <span class="keyword">sizeof</span> (abtRxBuf);
<a name="l00318"></a>00318 <span class="keywordflow">if</span> (SCardTransmit (pas->hCard, &(pas->ioCard), abtRxCmd, szRxCmdLen, NULL, abtRxBuf, (<span class="keywordtype">void</span> *) &szRxBufLen) !=
<a name="l00319"></a>00319 SCARD_S_SUCCESS) {
<a name="l00320"></a>00320 pnd-><a class="code" href="structnfc__device__t.html#a3cc2631649285ff97395e20d8abd1e6f">iLastError</a> = DEIO;
<a name="l00321"></a>00321 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00322"></a>00322 }
<a name="l00323"></a>00323 }
<a name="l00324"></a>00324 <span class="preprocessor">#ifdef DEBUG</span>
<a name="l00325"></a>00325 <span class="preprocessor"></span> PRINT_HEX (<span class="stringliteral">"RX"</span>, abtRxBuf, szRxBufLen);
<a name="l00326"></a>00326 <span class="preprocessor">#endif</span>
<a name="l00327"></a>00327 <span class="preprocessor"></span>
<a name="l00328"></a>00328 <span class="comment">// When the answer should be ignored, just return a succesful result</span>
<a name="l00329"></a>00329 <span class="keywordflow">if</span> (pbtRx == NULL || pszRx == NULL)
<a name="l00330"></a>00330 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00331"></a>00331
<a name="l00332"></a>00332 <span class="comment">// Make sure we have an emulated answer that fits the return buffer</span>
<a name="l00333"></a>00333 <span class="keywordflow">if</span> (szRxBufLen < 4 || (szRxBufLen - 4) > *pszRx) {
<a name="l00334"></a>00334 pnd-><a class="code" href="structnfc__device__t.html#a3cc2631649285ff97395e20d8abd1e6f">iLastError</a> = DEIO;
<a name="l00335"></a>00335 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00336"></a>00336 }
<a name="l00337"></a>00337 <span class="comment">// Wipe out the 4 APDU emulation bytes: D5 4B .. .. .. 90 00</span>
<a name="l00338"></a>00338 *pszRx = ((size_t) szRxBufLen) - 4;
<a name="l00339"></a>00339 memcpy (pbtRx, abtRxBuf + 2, *pszRx);
<a name="l00340"></a>00340
<a name="l00341"></a>00341 <span class="comment">// Transmission went successful</span>
<a name="l00342"></a>00342 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00343"></a>00343 }
<a name="l00344"></a>00344
<a name="l00345"></a>00345 <span class="keywordtype">char</span> *
<a name="l00346"></a>00346 acr122_firmware (<span class="keyword">const</span> nfc_device_spec_t nds)
<a name="l00347"></a>00347 {
<a name="l00348"></a>00348 byte_t abtGetFw[5] = { 0xFF, 0x00, 0x48, 0x00, 0x00 };
<a name="l00349"></a>00349 uint32_t uiResult;
<a name="l00350"></a>00350
<a name="l00351"></a>00351 acr122_spec_t *pas = (acr122_spec_t *) nds;
<a name="l00352"></a>00352 <span class="keyword">static</span> <span class="keywordtype">char</span> abtFw[11];
<a name="l00353"></a>00353 <span class="keywordtype">size_t</span> szFwLen = <span class="keyword">sizeof</span> (abtFw);
<a name="l00354"></a>00354 memset (abtFw, 0x00, szFwLen);
<a name="l00355"></a>00355 <span class="keywordflow">if</span> (pas->ioCard.dwProtocol == SCARD_PROTOCOL_UNDEFINED) {
<a name="l00356"></a>00356 uiResult = SCardControl (pas->hCard, IOCTL_CCID_ESCAPE_SCARD_CTL_CODE, abtGetFw, sizeof (abtGetFw), abtFw, szFwLen-1, (<span class="keywordtype">void</span> *) &szFwLen);
<a name="l00357"></a>00357 } <span class="keywordflow">else</span> {
<a name="l00358"></a>00358 uiResult = SCardTransmit (pas->hCard, &(pas->ioCard), abtGetFw, sizeof (abtGetFw), NULL, (byte_t *) abtFw, (<span class="keywordtype">void</span> *) &szFwLen);
<a name="l00359"></a>00359 }
<a name="l00360"></a>00360
<a name="l00361"></a>00361 <span class="keywordflow">if</span> (uiResult != SCARD_S_SUCCESS) {
<a name="l00362"></a>00362 ERR (<span class="stringliteral">"No ACR122 firmware received, Error: %08x"</span>, uiResult);
<a name="l00363"></a>00363 }
<a name="l00364"></a>00364
<a name="l00365"></a>00365 <span class="keywordflow">return</span> abtFw;
<a name="l00366"></a>00366 }
<a name="l00367"></a>00367
<a name="l00368"></a>00368 <span class="keywordtype">bool</span>
<a name="l00369"></a>00369 acr122_led_red (<span class="keyword">const</span> nfc_device_spec_t nds, <span class="keywordtype">bool</span> bOn)
<a name="l00370"></a>00370 {
<a name="l00371"></a>00371 byte_t abtLed[9] = { 0xFF, 0x00, 0x40, 0x05, 0x04, 0x00, 0x00, 0x00, 0x00 };
<a name="l00372"></a>00372 acr122_spec_t *pas = (acr122_spec_t *) nds;
<a name="l00373"></a>00373 byte_t abtBuf[2];
<a name="l00374"></a>00374 <span class="keywordtype">size_t</span> szBufLen = <span class="keyword">sizeof</span> (abtBuf);
<a name="l00375"></a>00375 (void) bOn;
<a name="l00376"></a>00376 <span class="keywordflow">if</span> (pas->ioCard.dwProtocol == SCARD_PROTOCOL_UNDEFINED) {
<a name="l00377"></a>00377 <span class="keywordflow">return</span> (SCardControl
<a name="l00378"></a>00378 (pas->hCard, IOCTL_CCID_ESCAPE_SCARD_CTL_CODE, abtLed, sizeof (abtLed), abtBuf, szBufLen,
<a name="l00379"></a>00379 (<span class="keywordtype">void</span> *) &szBufLen) == SCARD_S_SUCCESS);
<a name="l00380"></a>00380 } <span class="keywordflow">else</span> {
<a name="l00381"></a>00381 <span class="keywordflow">return</span> (SCardTransmit
<a name="l00382"></a>00382 (pas->hCard, &(pas->ioCard), abtLed, <span class="keyword">sizeof</span> (abtLed), NULL, (byte_t *) abtBuf,
<a name="l00383"></a>00383 (<span class="keywordtype">void</span> *) &szBufLen) == SCARD_S_SUCCESS);
<a name="l00384"></a>00384 }
<a name="l00385"></a>00385 }
</pre></div></div>
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