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<h1>pn532_uart.c</h1> </div>
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<a href="pn532__uart_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 "<a class="code" href="drivers_8h.html" title="Supported drivers header.">../drivers.h</a>"</span>
<a name="l00030"></a>00030
<a name="l00031"></a>00031 <span class="preprocessor">#include <stdio.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="pn532__uart_8h.html">pn532_uart.h</a>"</span>
<a name="l00035"></a>00035
<a name="l00036"></a>00036 <span class="preprocessor">#include <nfc/nfc.h></span>
<a name="l00037"></a>00037 <span class="preprocessor">#include <nfc/nfc-messages.h></span>
<a name="l00038"></a>00038
<a name="l00039"></a>00039 <span class="comment">// Bus</span>
<a name="l00040"></a>00040 <span class="preprocessor">#include "uart.h"</span>
<a name="l00041"></a>00041
<a name="l00042"></a>00042 <span class="preprocessor">#define SERIAL_DEFAULT_PORT_SPEED 115200</span>
<a name="l00043"></a>00043 <span class="preprocessor"></span>
<a name="l00044"></a>00044 <span class="comment">// TODO Move this one level up for libnfc-1.6</span>
<a name="l00045"></a>00045 <span class="keyword">static</span> <span class="keyword">const</span> byte_t ack_frame[] = { 0x00, 0x00, 0xff, 0x00, 0xff, 0x00 };
<a name="l00046"></a>00046
<a name="l00047"></a>00047 <span class="keywordtype">void</span> pn532_uart_ack (<span class="keyword">const</span> nfc_device_spec_t nds);
<a name="l00048"></a>00048 <span class="keywordtype">void</span> <a class="code" href="pn532__uart_8c.html#a1b7d8d250f63d153cdba11625219692e">pn532_uart_wakeup</a> (<span class="keyword">const</span> nfc_device_spec_t nds);
<a name="l00049"></a>00049 <span class="keywordtype">bool</span> <a class="code" href="pn532__uart_8c.html#a5ba1691e518d61088e6d9553af051d49">pn532_uart_check_communication</a> (<span class="keyword">const</span> nfc_device_spec_t nds, <span class="keywordtype">bool</span> * success);
<a name="l00050"></a>00050
<a name="l00051"></a>00051 <a class="code" href="structnfc__device__desc__t.html" title="NFC device description.">nfc_device_desc_t</a> *
<a name="l00052"></a>00052 pn532_uart_pick_device (<span class="keywordtype">void</span>)
<a name="l00053"></a>00053 {
<a name="l00054"></a>00054 <a class="code" href="structnfc__device__desc__t.html" title="NFC device description.">nfc_device_desc_t</a> *pndd;
<a name="l00055"></a>00055
<a name="l00056"></a>00056 <span class="keywordflow">if</span> ((pndd = malloc (<span class="keyword">sizeof</span> (*pndd)))) {
<a name="l00057"></a>00057 <span class="keywordtype">size_t</span> szN;
<a name="l00058"></a>00058
<a name="l00059"></a>00059 <span class="keywordflow">if</span> (!<a class="code" href="pn532__uart_8c.html#add391a8dfaee62f3a7c066912301e3ad">pn532_uart_list_devices</a> (pndd, 1, &szN)) {
<a name="l00060"></a>00060 DBG (<span class="stringliteral">"%s"</span>, <span class="stringliteral">"pn532_uart_list_devices failed"</span>);
<a name="l00061"></a>00061 free (pndd);
<a name="l00062"></a>00062 <span class="keywordflow">return</span> NULL;
<a name="l00063"></a>00063 }
<a name="l00064"></a>00064
<a name="l00065"></a>00065 <span class="keywordflow">if</span> (szN == 0) {
<a name="l00066"></a>00066 DBG (<span class="stringliteral">"%s"</span>, <span class="stringliteral">"No device found"</span>);
<a name="l00067"></a>00067 free (pndd);
<a name="l00068"></a>00068 <span class="keywordflow">return</span> NULL;
<a name="l00069"></a>00069 }
<a name="l00070"></a>00070 }
<a name="l00071"></a>00071
<a name="l00072"></a>00072 <span class="keywordflow">return</span> pndd;
<a name="l00073"></a>00073 }
<a name="l00074"></a>00074
<a name="l00075"></a>00075 <span class="keywordtype">bool</span>
<a name="l00076"></a><a class="code" href="pn532__uart_8h.html#add391a8dfaee62f3a7c066912301e3ad">00076</a> <a class="code" href="pn532__uart_8c.html#add391a8dfaee62f3a7c066912301e3ad">pn532_uart_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="l00077"></a>00077 {
<a name="l00081"></a>00081 <span class="preprocessor">#ifndef SERIAL_AUTOPROBE_ENABLED</span>
<a name="l00082"></a>00082 <span class="preprocessor"></span> (void) pnddDevices;
<a name="l00083"></a>00083 (void) szDevices;
<a name="l00084"></a>00084 *pszDeviceFound = 0;
<a name="l00085"></a>00085 DBG (<span class="stringliteral">"%s"</span>, <span class="stringliteral">"Serial auto-probing have been disabled at compile time. Skipping autoprobe."</span>);
<a name="l00086"></a>00086 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00087"></a>00087 <span class="preprocessor">#else </span><span class="comment">/* SERIAL_AUTOPROBE_ENABLED */</span>
<a name="l00088"></a>00088 *pszDeviceFound = 0;
<a name="l00089"></a>00089
<a name="l00090"></a>00090 serial_port sp;
<a name="l00091"></a>00091 <span class="keyword">const</span> <span class="keywordtype">char</span> *pcPorts[] = DEFAULT_SERIAL_PORTS;
<a name="l00092"></a>00092 <span class="keyword">const</span> <span class="keywordtype">char</span> *pcPort;
<a name="l00093"></a>00093 <span class="keywordtype">int</span> iDevice = 0;
<a name="l00094"></a>00094
<a name="l00095"></a>00095 <span class="keywordflow">while</span> ((pcPort = pcPorts[iDevice++])) {
<a name="l00096"></a>00096 sp = uart_open (pcPort);
<a name="l00097"></a>00097 DBG (<span class="stringliteral">"Trying to find PN532 device on serial port: %s at %d bauds."</span>, pcPort, SERIAL_DEFAULT_PORT_SPEED);
<a name="l00098"></a>00098
<a name="l00099"></a>00099 <span class="keywordflow">if</span> ((sp != INVALID_SERIAL_PORT) && (sp != CLAIMED_SERIAL_PORT)) {
<a name="l00100"></a>00100 <span class="keywordtype">bool</span> bComOk;
<a name="l00101"></a>00101 <span class="comment">// Serial port claimed but we need to check if a PN532_UART is connected.</span>
<a name="l00102"></a>00102 uart_set_speed (sp, SERIAL_DEFAULT_PORT_SPEED);
<a name="l00103"></a>00103 <span class="comment">// PN532 could be powered down, we need to wake it up before line testing.</span>
<a name="l00104"></a>00104 <a class="code" href="pn532__uart_8c.html#a1b7d8d250f63d153cdba11625219692e">pn532_uart_wakeup</a> ((nfc_device_spec_t) sp);
<a name="l00105"></a>00105 <span class="comment">// Check communication using "Diagnose" command, with "Communication test" (0x00)</span>
<a name="l00106"></a>00106 <span class="keywordflow">if</span> (!<a class="code" href="pn532__uart_8c.html#a5ba1691e518d61088e6d9553af051d49">pn532_uart_check_communication</a> ((nfc_device_spec_t) sp, &bComOk))
<a name="l00107"></a>00107 <span class="keywordflow">continue</span>;
<a name="l00108"></a>00108 <span class="keywordflow">if</span> (!bComOk)
<a name="l00109"></a>00109 <span class="keywordflow">continue</span>;
<a name="l00110"></a>00110 uart_close (sp);
<a name="l00111"></a>00111
<a name="l00112"></a>00112 snprintf (pnddDevices[*pszDeviceFound].acDevice, DEVICE_NAME_LENGTH - 1, <span class="stringliteral">"%s (%s)"</span>, <span class="stringliteral">"PN532"</span>, pcPort);
<a name="l00113"></a>00113 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="l00114"></a>00114 pnddDevices[*pszDeviceFound].<a class="code" href="structnfc__device__desc__t.html#abbe6b78fa97f57c5a240317a34a990bd">pcDriver</a> = PN532_UART_DRIVER_NAME;
<a name="l00115"></a>00115 pnddDevices[*pszDeviceFound].<a class="code" href="structnfc__device__desc__t.html#a9b3f82b85fd32737120b87c761f437cb">pcPort</a> = strdup (pcPort);
<a name="l00116"></a>00116 pnddDevices[*pszDeviceFound].<a class="code" href="structnfc__device__desc__t.html#a85e23285e26810f0ca4b5a4713b890b5">uiSpeed</a> = SERIAL_DEFAULT_PORT_SPEED;
<a name="l00117"></a>00117 DBG (<span class="stringliteral">"Device found: %s."</span>, pnddDevices[*pszDeviceFound].acDevice);
<a name="l00118"></a>00118 (*pszDeviceFound)++;
<a name="l00119"></a>00119
<a name="l00120"></a>00120 <span class="comment">// Test if we reach the maximum "wanted" devices</span>
<a name="l00121"></a>00121 <span class="keywordflow">if</span> ((*pszDeviceFound) >= szDevices)
<a name="l00122"></a>00122 <span class="keywordflow">break</span>;
<a name="l00123"></a>00123 }
<a name="l00124"></a>00124 <span class="preprocessor"># ifdef DEBUG</span>
<a name="l00125"></a>00125 <span class="preprocessor"></span> <span class="keywordflow">if</span> (sp == INVALID_SERIAL_PORT)
<a name="l00126"></a>00126 DBG (<span class="stringliteral">"Invalid serial port: %s"</span>, pcPort);
<a name="l00127"></a>00127 <span class="keywordflow">if</span> (sp == CLAIMED_SERIAL_PORT)
<a name="l00128"></a>00128 DBG (<span class="stringliteral">"Serial port already claimed: %s"</span>, pcPort);
<a name="l00129"></a>00129 <span class="preprocessor"># endif</span>
<a name="l00130"></a>00130 <span class="preprocessor"></span> <span class="comment">/* DEBUG */</span>
<a name="l00131"></a>00131 }
<a name="l00132"></a>00132 <span class="preprocessor">#endif </span><span class="comment">/* SERIAL_AUTOPROBE_ENABLED */</span>
<a name="l00133"></a>00133 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00134"></a>00134 }
<a name="l00135"></a>00135
<a name="l00136"></a>00136 <a class="code" href="structnfc__device__t.html" title="NFC device information.">nfc_device_t</a> *
<a name="l00137"></a>00137 pn532_uart_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="l00138"></a>00138 {
<a name="l00139"></a>00139 serial_port sp;
<a name="l00140"></a>00140 <a class="code" href="structnfc__device__t.html" title="NFC device information.">nfc_device_t</a> *pnd = NULL;
<a name="l00141"></a>00141 <span class="keywordtype">bool</span> bComOk;
<a name="l00142"></a>00142
<a name="l00143"></a>00143 DBG (<span class="stringliteral">"Attempt to connect to: %s at %d bauds."</span>, pndd-><a class="code" href="structnfc__device__desc__t.html#a9b3f82b85fd32737120b87c761f437cb">pcPort</a>, pndd-><a class="code" href="structnfc__device__desc__t.html#a85e23285e26810f0ca4b5a4713b890b5">uiSpeed</a>);
<a name="l00144"></a>00144 sp = uart_open (pndd-><a class="code" href="structnfc__device__desc__t.html#a9b3f82b85fd32737120b87c761f437cb">pcPort</a>);
<a name="l00145"></a>00145
<a name="l00146"></a>00146 <span class="keywordflow">if</span> (sp == INVALID_SERIAL_PORT)
<a name="l00147"></a>00147 ERR (<span class="stringliteral">"Invalid serial port: %s"</span>, pndd-><a class="code" href="structnfc__device__desc__t.html#a9b3f82b85fd32737120b87c761f437cb">pcPort</a>);
<a name="l00148"></a>00148 <span class="keywordflow">if</span> (sp == CLAIMED_SERIAL_PORT)
<a name="l00149"></a>00149 ERR (<span class="stringliteral">"Serial port already claimed: %s"</span>, pndd-><a class="code" href="structnfc__device__desc__t.html#a9b3f82b85fd32737120b87c761f437cb">pcPort</a>);
<a name="l00150"></a>00150 <span class="keywordflow">if</span> ((sp == CLAIMED_SERIAL_PORT) || (sp == INVALID_SERIAL_PORT))
<a name="l00151"></a>00151 <span class="keywordflow">return</span> NULL;
<a name="l00152"></a>00152
<a name="l00153"></a>00153 uart_set_speed (sp, pndd-><a class="code" href="structnfc__device__desc__t.html#a85e23285e26810f0ca4b5a4713b890b5">uiSpeed</a>);
<a name="l00154"></a>00154
<a name="l00155"></a>00155 <span class="comment">// PN532 could be powered down, we need to wake it up before line testing.</span>
<a name="l00156"></a>00156 <a class="code" href="pn532__uart_8c.html#a1b7d8d250f63d153cdba11625219692e">pn532_uart_wakeup</a> ((nfc_device_spec_t) sp);
<a name="l00157"></a>00157 <span class="comment">// Check communication using "Diagnose" command, with "Communication test" (0x00)</span>
<a name="l00158"></a>00158 <span class="keywordflow">if</span> (!<a class="code" href="pn532__uart_8c.html#a5ba1691e518d61088e6d9553af051d49">pn532_uart_check_communication</a> ((nfc_device_spec_t) sp, &bComOk))
<a name="l00159"></a>00159 <span class="keywordflow">return</span> NULL;
<a name="l00160"></a>00160 <span class="keywordflow">if</span> (!bComOk)
<a name="l00161"></a>00161 <span class="keywordflow">return</span> NULL;
<a name="l00162"></a>00162
<a name="l00163"></a>00163 DBG (<span class="stringliteral">"Successfully connected to: %s"</span>, pndd-><a class="code" href="structnfc__device__desc__t.html#a9b3f82b85fd32737120b87c761f437cb">pcPort</a>);
<a name="l00164"></a>00164
<a name="l00165"></a>00165 <span class="comment">// We have a connection</span>
<a name="l00166"></a>00166 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="l00167"></a>00167 strncpy (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>, DEVICE_NAME_LENGTH - 1);
<a name="l00168"></a>00168 pnd-><a class="code" href="structnfc__device__t.html#a3933f0bea196fedca0345a7f940dc85b">acName</a>[DEVICE_NAME_LENGTH - 1] = <span class="charliteral">'\0'</span>;
<a name="l00169"></a>00169
<a name="l00170"></a>00170 pnd-><a class="code" href="structnfc__device__t.html#ac38d710f875a0ffbee062569f513dfff">nc</a> = NC_PN532;
<a name="l00171"></a>00171 pnd-><a class="code" href="structnfc__device__t.html#a2cef5cf7a0f7590c2398bac39bef7bee">nds</a> = (nfc_device_spec_t) sp;
<a name="l00172"></a>00172 pnd-><a class="code" href="structnfc__device__t.html#ae89fdb258019e1c68073c31acc8a1367">bActive</a> = <span class="keyword">true</span>;
<a name="l00173"></a>00173
<a name="l00174"></a>00174 <span class="keywordflow">return</span> pnd;
<a name="l00175"></a>00175 }
<a name="l00176"></a>00176
<a name="l00177"></a>00177 <span class="keywordtype">void</span>
<a name="l00178"></a>00178 pn532_uart_disconnect (<a class="code" href="structnfc__device__t.html" title="NFC device information.">nfc_device_t</a> * pnd)
<a name="l00179"></a>00179 {
<a name="l00180"></a>00180 uart_close ((serial_port) pnd-><a class="code" href="structnfc__device__t.html#a2cef5cf7a0f7590c2398bac39bef7bee">nds</a>);
<a name="l00181"></a>00181 free (pnd);
<a name="l00182"></a>00182 }
<a name="l00183"></a>00183
<a name="l00184"></a>00184 <span class="preprocessor">#define TX_BUFFER_LEN (256)</span>
<a name="l00185"></a>00185 <span class="preprocessor"></span><span class="preprocessor">#define RX_BUFFER_LEN (PN53x_EXTENDED_FRAME_MAX_LEN + PN53x_EXTENDED_FRAME_OVERHEAD)</span>
<a name="l00186"></a>00186 <span class="preprocessor"></span><span class="keywordtype">bool</span>
<a name="l00187"></a>00187 pn532_uart_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,
<a name="l00188"></a>00188 <span class="keywordtype">size_t</span> * pszRx)
<a name="l00189"></a>00189 {
<a name="l00190"></a>00190 byte_t abtTxBuf[TX_BUFFER_LEN] = { 0x00, 0x00, 0xff }; <span class="comment">// Every packet must start with "00 00 ff"</span>
<a name="l00191"></a>00191 byte_t abtRxBuf[RX_BUFFER_LEN];
<a name="l00192"></a>00192 <span class="keywordtype">size_t</span> szRxBufLen = MIN( RX_BUFFER_LEN, *pszRx );
<a name="l00193"></a>00193 <span class="keywordtype">size_t</span> szPos;
<a name="l00194"></a>00194 <span class="keywordtype">int</span> res;
<a name="l00195"></a>00195
<a name="l00196"></a>00196 <span class="comment">// Packet length = data length (len) + checksum (1) + end of stream marker (1)</span>
<a name="l00197"></a>00197 abtTxBuf[3] = szTx;
<a name="l00198"></a>00198 <span class="comment">// Packet length checksum</span>
<a name="l00199"></a>00199 abtTxBuf[4] = 256 - abtTxBuf[3];
<a name="l00200"></a>00200 <span class="comment">// Copy the PN53X command into the packet buffer</span>
<a name="l00201"></a>00201 memmove (abtTxBuf + 5, pbtTx, szTx);
<a name="l00202"></a>00202
<a name="l00203"></a>00203 <span class="comment">// Calculate data payload checksum</span>
<a name="l00204"></a>00204 abtTxBuf[szTx + 5] = 0;
<a name="l00205"></a>00205 <span class="keywordflow">for</span> (szPos = 0; szPos < szTx; szPos++) {
<a name="l00206"></a>00206 abtTxBuf[szTx + 5] -= abtTxBuf[szPos + 5];
<a name="l00207"></a>00207 }
<a name="l00208"></a>00208
<a name="l00209"></a>00209 <span class="comment">// End of stream marker</span>
<a name="l00210"></a>00210 abtTxBuf[szTx + 6] = 0;
<a name="l00211"></a>00211
<a name="l00212"></a>00212 <span class="preprocessor">#ifdef DEBUG</span>
<a name="l00213"></a>00213 <span class="preprocessor"></span> PRINT_HEX (<span class="stringliteral">"TX"</span>, abtTxBuf, szTx + 7);
<a name="l00214"></a>00214 <span class="preprocessor">#endif</span>
<a name="l00215"></a>00215 <span class="preprocessor"></span> res = <a class="code" href="uart_8h.html#a39c415b8d6fa14b2168f2a35cbac48d0" title="Send pbtTx content to UART.">uart_send</a> ((serial_port) pnd-><a class="code" href="structnfc__device__t.html#a2cef5cf7a0f7590c2398bac39bef7bee">nds</a>, abtTxBuf, szTx + 7);
<a name="l00216"></a>00216 <span class="keywordflow">if</span> (res != 0) {
<a name="l00217"></a>00217 ERR (<span class="stringliteral">"%s"</span>, <span class="stringliteral">"Unable to transmit data. (TX)"</span>);
<a name="l00218"></a>00218 pnd-><a class="code" href="structnfc__device__t.html#a3cc2631649285ff97395e20d8abd1e6f">iLastError</a> = res;
<a name="l00219"></a>00219 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00220"></a>00220 }
<a name="l00221"></a>00221
<a name="l00222"></a>00222 res = <a class="code" href="uart_8h.html#a51a4c4c363a0de96e1e9df399ae8b2f4" title="Receive data from UART and copy data to pbtRx.">uart_receive</a> ((serial_port) pnd-><a class="code" href="structnfc__device__t.html#a2cef5cf7a0f7590c2398bac39bef7bee">nds</a>, abtRxBuf, &szRxBufLen);
<a name="l00223"></a>00223 <span class="keywordflow">if</span> (res != 0) {
<a name="l00224"></a>00224 ERR (<span class="stringliteral">"%s"</span>, <span class="stringliteral">"Unable to receive data. (RX)"</span>);
<a name="l00225"></a>00225 pnd-><a class="code" href="structnfc__device__t.html#a3cc2631649285ff97395e20d8abd1e6f">iLastError</a> = res;
<a name="l00226"></a>00226 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00227"></a>00227 }
<a name="l00228"></a>00228 <span class="preprocessor">#ifdef DEBUG</span>
<a name="l00229"></a>00229 <span class="preprocessor"></span> PRINT_HEX (<span class="stringliteral">"RX"</span>, abtRxBuf, szRxBufLen);
<a name="l00230"></a>00230 <span class="preprocessor">#endif</span>
<a name="l00231"></a>00231 <span class="preprocessor"></span>
<a name="l00232"></a>00232 <span class="comment">// WARN: UART is a per byte reception, so you usually receive ACK and next frame the same time</span>
<a name="l00233"></a>00233 <span class="keywordflow">if</span> (!pn53x_check_ack_frame_callback (pnd, abtRxBuf, szRxBufLen))
<a name="l00234"></a>00234 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00235"></a>00235 szRxBufLen -= <span class="keyword">sizeof</span> (ack_frame);
<a name="l00236"></a>00236 memmove (abtRxBuf, abtRxBuf + <span class="keyword">sizeof</span> (ack_frame), szRxBufLen);
<a name="l00237"></a>00237
<a name="l00238"></a>00238 <span class="keywordflow">if</span> (szRxBufLen == 0) {
<a name="l00239"></a>00239 szRxBufLen = RX_BUFFER_LEN;
<a name="l00240"></a>00240 <span class="keywordflow">do</span> {
<a name="l00241"></a>00241 delay_ms (10);
<a name="l00242"></a>00242 res = <a class="code" href="uart_8h.html#a51a4c4c363a0de96e1e9df399ae8b2f4" title="Receive data from UART and copy data to pbtRx.">uart_receive</a> ((serial_port) pnd-><a class="code" href="structnfc__device__t.html#a2cef5cf7a0f7590c2398bac39bef7bee">nds</a>, abtRxBuf, &szRxBufLen);
<a name="l00243"></a>00243 } <span class="keywordflow">while</span> (res != 0);
<a name="l00244"></a>00244 <span class="preprocessor">#ifdef DEBUG</span>
<a name="l00245"></a>00245 <span class="preprocessor"></span> PRINT_HEX (<span class="stringliteral">"RX"</span>, abtRxBuf, szRxBufLen);
<a name="l00246"></a>00246 <span class="preprocessor">#endif</span>
<a name="l00247"></a>00247 <span class="preprocessor"></span> }
<a name="l00248"></a>00248
<a name="l00249"></a>00249 <span class="preprocessor">#ifdef DEBUG</span>
<a name="l00250"></a>00250 <span class="preprocessor"></span> PRINT_HEX (<span class="stringliteral">"TX"</span>, ack_frame, <span class="keyword">sizeof</span>(ack_frame));
<a name="l00251"></a>00251 <span class="preprocessor">#endif</span>
<a name="l00252"></a>00252 <span class="preprocessor"></span> res = <a class="code" href="uart_8h.html#a39c415b8d6fa14b2168f2a35cbac48d0" title="Send pbtTx content to UART.">uart_send</a> ((serial_port) pnd-><a class="code" href="structnfc__device__t.html#a2cef5cf7a0f7590c2398bac39bef7bee">nds</a>, ack_frame, <span class="keyword">sizeof</span>(ack_frame));
<a name="l00253"></a>00253 <span class="keywordflow">if</span> (res != 0) {
<a name="l00254"></a>00254 ERR (<span class="stringliteral">"%s"</span>, <span class="stringliteral">"Unable to transmit data. (TX)"</span>);
<a name="l00255"></a>00255 pnd-><a class="code" href="structnfc__device__t.html#a3cc2631649285ff97395e20d8abd1e6f">iLastError</a> = res;
<a name="l00256"></a>00256 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00257"></a>00257 }
<a name="l00258"></a>00258
<a name="l00259"></a>00259 <span class="keywordflow">if</span> (!pn53x_check_error_frame_callback (pnd, abtRxBuf, szRxBufLen))
<a name="l00260"></a>00260 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00261"></a>00261
<a name="l00262"></a>00262 <span class="comment">// When the answer should be ignored, just return a successful result</span>
<a name="l00263"></a>00263 <span class="keywordflow">if</span> (pbtRx == NULL || pszRx == NULL)
<a name="l00264"></a>00264 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00265"></a>00265
<a name="l00266"></a>00266 <span class="comment">// Only succeed when the result is at least 00 00 FF xx Fx Dx xx .. .. .. xx 00 (x = variable)</span>
<a name="l00267"></a>00267 <span class="keywordflow">if</span> (szRxBufLen < 9) {
<a name="l00268"></a>00268 pnd-><a class="code" href="structnfc__device__t.html#a3cc2631649285ff97395e20d8abd1e6f">iLastError</a> = DEINVAL;
<a name="l00269"></a>00269 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00270"></a>00270 }
<a name="l00271"></a>00271 <span class="comment">// Remove the preceding and appending bytes 00 00 ff 00 ff 00 00 00 FF xx Fx .. .. .. xx 00 (x = variable)</span>
<a name="l00272"></a>00272 *pszRx = szRxBufLen - 9;
<a name="l00273"></a>00273 memcpy (pbtRx, abtRxBuf + 7, *pszRx);
<a name="l00274"></a>00274
<a name="l00275"></a>00275 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00276"></a>00276 }
<a name="l00277"></a>00277
<a name="l00278"></a>00278 <span class="keywordtype">void</span>
<a name="l00279"></a>00279 pn532_uart_ack (<span class="keyword">const</span> nfc_device_spec_t nds)
<a name="l00280"></a>00280 {
<a name="l00281"></a>00281 <span class="preprocessor">#ifdef DEBUG</span>
<a name="l00282"></a>00282 <span class="preprocessor"></span> PRINT_HEX (<span class="stringliteral">"TX"</span>, ack_frame, <span class="keyword">sizeof</span> (ack_frame));
<a name="l00283"></a>00283 <span class="preprocessor">#endif</span>
<a name="l00284"></a>00284 <span class="preprocessor"></span> <a class="code" href="uart_8h.html#a39c415b8d6fa14b2168f2a35cbac48d0" title="Send pbtTx content to UART.">uart_send</a> ((serial_port) nds, ack_frame, <span class="keyword">sizeof</span> (ack_frame));
<a name="l00285"></a>00285 }
<a name="l00286"></a>00286
<a name="l00287"></a>00287 <span class="keywordtype">bool</span>
<a name="l00288"></a>00288 pn532_uart_wait_for_ack(<span class="keyword">const</span> nfc_device_spec_t nds)
<a name="l00289"></a>00289 {
<a name="l00290"></a>00290 byte_t abtRx[RX_BUFFER_LEN];
<a name="l00291"></a>00291 <span class="keywordtype">size_t</span> szRx = <span class="keyword">sizeof</span>(ack_frame);
<a name="l00292"></a>00292 <span class="keywordflow">if</span> (0 == <a class="code" href="uart_8h.html#a51a4c4c363a0de96e1e9df399ae8b2f4" title="Receive data from UART and copy data to pbtRx.">uart_receive</a> ((serial_port) nds, abtRx, &szRx)) {
<a name="l00293"></a>00293 <span class="preprocessor">#ifdef DEBUG </span>
<a name="l00294"></a>00294 <span class="preprocessor"></span> PRINT_HEX (<span class="stringliteral">"RX"</span>, abtRx, szRx);
<a name="l00295"></a>00295 <span class="preprocessor">#endif</span>
<a name="l00296"></a>00296 <span class="preprocessor"></span> } <span class="keywordflow">else</span> {
<a name="l00297"></a>00297 ERR (<span class="stringliteral">"No ACK."</span>);
<a name="l00298"></a>00298 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00299"></a>00299 }
<a name="l00300"></a>00300 <span class="keywordflow">if</span> (0 != memcmp (ack_frame, abtRx, szRx))
<a name="l00301"></a>00301 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00302"></a>00302 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00303"></a>00303 }
<a name="l00304"></a>00304
<a name="l00305"></a>00305 <span class="preprocessor">#define PN53X_RX_OVERHEAD 6</span>
<a name="l00306"></a>00306 <span class="preprocessor"></span><span class="keywordtype">void</span>
<a name="l00307"></a><a class="code" href="pn532__uart_8c.html#a1b7d8d250f63d153cdba11625219692e">00307</a> <a class="code" href="pn532__uart_8c.html#a1b7d8d250f63d153cdba11625219692e">pn532_uart_wakeup</a> (<span class="keyword">const</span> nfc_device_spec_t nds)
<a name="l00308"></a>00308 {
<a name="l00309"></a>00309 byte_t abtRx[RX_BUFFER_LEN];
<a name="l00310"></a>00310 <span class="keywordtype">size_t</span> szRx = PN53x_NORMAL_FRAME_OVERHEAD + 2;
<a name="l00314"></a>00314 <span class="keyword">const</span> byte_t pncmd_pn532c106_wakeup_preamble[] =
<a name="l00315"></a>00315 { 0x55, 0x55, 0x00, 0x00, 0x00,
<a name="l00316"></a>00316 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
<a name="l00317"></a>00317 0x00, 0x00, 0xff, 0x03, 0xfd, 0xd4, 0x14, 0x01, 0x17, 0x00 }; <span class="comment">// Here we send a SAMConfiguration command (Normal mode, the SAM is not used; this is the default mode)</span>
<a name="l00318"></a>00318 <span class="preprocessor">#ifdef DEBUG</span>
<a name="l00319"></a>00319 <span class="preprocessor"></span> PRINT_HEX (<span class="stringliteral">"TX"</span>, pncmd_pn532c106_wakeup_preamble, <span class="keyword">sizeof</span> (pncmd_pn532c106_wakeup_preamble));
<a name="l00320"></a>00320 <span class="preprocessor">#endif</span>
<a name="l00321"></a>00321 <span class="preprocessor"></span> <a class="code" href="uart_8h.html#a39c415b8d6fa14b2168f2a35cbac48d0" title="Send pbtTx content to UART.">uart_send</a> ((serial_port) nds, pncmd_pn532c106_wakeup_preamble, <span class="keyword">sizeof</span> (pncmd_pn532c106_wakeup_preamble));
<a name="l00322"></a>00322
<a name="l00323"></a>00323 pn532_uart_wait_for_ack(nds);
<a name="l00324"></a>00324
<a name="l00325"></a>00325 <span class="keywordflow">if</span> (0 == <a class="code" href="uart_8h.html#a51a4c4c363a0de96e1e9df399ae8b2f4" title="Receive data from UART and copy data to pbtRx.">uart_receive</a> ((serial_port) nds, abtRx, &szRx)) {
<a name="l00326"></a>00326 <span class="preprocessor">#ifdef DEBUG</span>
<a name="l00327"></a>00327 <span class="preprocessor"></span> PRINT_HEX (<span class="stringliteral">"RX"</span>, abtRx, szRx);
<a name="l00328"></a>00328 <span class="preprocessor">#endif</span>
<a name="l00329"></a>00329 <span class="preprocessor"></span> } <span class="keywordflow">else</span> {
<a name="l00330"></a>00330 ERR (<span class="stringliteral">"Unable to wakeup the PN532."</span>);
<a name="l00331"></a>00331 }
<a name="l00332"></a>00332 }
<a name="l00333"></a>00333
<a name="l00334"></a>00334 <span class="keywordtype">bool</span>
<a name="l00335"></a><a class="code" href="pn532__uart_8c.html#a5ba1691e518d61088e6d9553af051d49">00335</a> <a class="code" href="pn532__uart_8c.html#a5ba1691e518d61088e6d9553af051d49">pn532_uart_check_communication</a> (<span class="keyword">const</span> nfc_device_spec_t nds, <span class="keywordtype">bool</span> * success)
<a name="l00336"></a>00336 {
<a name="l00337"></a>00337 byte_t abtRx[RX_BUFFER_LEN];
<a name="l00338"></a>00338 <span class="keyword">const</span> byte_t attempted_result[] =
<a name="l00339"></a>00339 { 0x00, 0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0x00, 0xff, 0x09, 0xf7, 0xD5, 0x01, 0x00, <span class="charliteral">'l'</span>, <span class="charliteral">'i'</span>, <span class="charliteral">'b'</span>, <span class="charliteral">'n'</span>, <span class="charliteral">'f'</span>, <span class="charliteral">'c'</span>,
<a name="l00340"></a>00340 0xbc, 0x00 };
<a name="l00341"></a>00341 <span class="keywordtype">size_t</span> szRx = <span class="keyword">sizeof</span>(attempted_result);
<a name="l00342"></a>00342 <span class="keywordtype">int</span> res;
<a name="l00343"></a>00343
<a name="l00345"></a>00345 <span class="keyword">const</span> byte_t pncmd_communication_test[] =
<a name="l00346"></a>00346 { 0x00, 0x00, 0xff, 0x09, 0xf7, 0xd4, 0x00, 0x00, <span class="charliteral">'l'</span>, <span class="charliteral">'i'</span>, <span class="charliteral">'b'</span>, <span class="charliteral">'n'</span>, <span class="charliteral">'f'</span>, <span class="charliteral">'c'</span>, 0xbe, 0x00 };
<a name="l00347"></a>00347
<a name="l00348"></a>00348 *success = <span class="keyword">false</span>;
<a name="l00349"></a>00349
<a name="l00350"></a>00350 <span class="preprocessor">#ifdef DEBUG</span>
<a name="l00351"></a>00351 <span class="preprocessor"></span> PRINT_HEX (<span class="stringliteral">"TX"</span>, pncmd_communication_test, <span class="keyword">sizeof</span> (pncmd_communication_test));
<a name="l00352"></a>00352 <span class="preprocessor">#endif</span>
<a name="l00353"></a>00353 <span class="preprocessor"></span> res = <a class="code" href="uart_8h.html#a39c415b8d6fa14b2168f2a35cbac48d0" title="Send pbtTx content to UART.">uart_send</a> ((serial_port) nds, pncmd_communication_test, <span class="keyword">sizeof</span> (pncmd_communication_test));
<a name="l00354"></a>00354 <span class="keywordflow">if</span> (res != 0) {
<a name="l00355"></a>00355 ERR (<span class="stringliteral">"%s"</span>, <span class="stringliteral">"Unable to transmit data. (TX)"</span>);
<a name="l00356"></a>00356 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00357"></a>00357 }
<a name="l00358"></a>00358
<a name="l00359"></a>00359 res = <a class="code" href="uart_8h.html#a51a4c4c363a0de96e1e9df399ae8b2f4" title="Receive data from UART and copy data to pbtRx.">uart_receive</a> ((serial_port) nds, abtRx, &szRx);
<a name="l00360"></a>00360 <span class="keywordflow">if</span> (res != 0) {
<a name="l00361"></a>00361 ERR (<span class="stringliteral">"%s"</span>, <span class="stringliteral">"Unable to receive data. (RX)"</span>);
<a name="l00362"></a>00362 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00363"></a>00363 }
<a name="l00364"></a>00364 <span class="preprocessor">#ifdef DEBUG</span>
<a name="l00365"></a>00365 <span class="preprocessor"></span> PRINT_HEX (<span class="stringliteral">"RX"</span>, abtRx, szRx);
<a name="l00366"></a>00366 <span class="preprocessor">#endif</span>
<a name="l00367"></a>00367 <span class="preprocessor"></span>
<a name="l00368"></a>00368 <span class="keywordflow">if</span> (0 == memcmp (abtRx, attempted_result, <span class="keyword">sizeof</span> (attempted_result)))
<a name="l00369"></a>00369 *success = <span class="keyword">true</span>;
<a name="l00370"></a>00370
<a name="l00371"></a>00371 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00372"></a>00372 }
</pre></div></div>
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