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<h1>uart_win32.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</span>
<a name="l00003"></a>00003 <span class="comment"> * </span>
<a name="l00004"></a>00004 <span class="comment"> * Copyright (C) 2009, 2010, Roel Verdult, Romuald Conty</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 <span class="comment"> */</span>
<a name="l00020"></a>00020
<a name="l00026"></a>00026 <span class="keyword">typedef</span> <span class="keyword">struct </span>{
<a name="l00027"></a>00027 HANDLE hPort; <span class="comment">// Serial port handle</span>
<a name="l00028"></a>00028 DCB dcb; <span class="comment">// Device control settings</span>
<a name="l00029"></a>00029 COMMTIMEOUTS ct; <span class="comment">// Serial port time-out configuration</span>
<a name="l00030"></a>00030 } serial_port_windows;
<a name="l00031"></a>00031
<a name="l00032"></a>00032 serial_port
<a name="l00033"></a>00033 uart_open (<span class="keyword">const</span> <span class="keywordtype">char</span> *pcPortName)
<a name="l00034"></a>00034 {
<a name="l00035"></a>00035 <span class="keywordtype">char</span> acPortName[255];
<a name="l00036"></a>00036 serial_port_windows *sp = malloc (<span class="keyword">sizeof</span> (serial_port_windows));
<a name="l00037"></a>00037
<a name="l00038"></a>00038 <span class="comment">// Copy the input "com?" to "\\.\COM?" format</span>
<a name="l00039"></a>00039 sprintf (acPortName, <span class="stringliteral">"\\\\.\\%s"</span>, pcPortName);
<a name="l00040"></a>00040 _strupr (acPortName);
<a name="l00041"></a>00041
<a name="l00042"></a>00042 <span class="comment">// Try to open the serial port</span>
<a name="l00043"></a>00043 sp->hPort = CreateFileA (acPortName, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
<a name="l00044"></a>00044 <span class="keywordflow">if</span> (sp->hPort == INVALID_HANDLE_VALUE) {
<a name="l00045"></a>00045 uart_close (sp);
<a name="l00046"></a>00046 <span class="keywordflow">return</span> INVALID_SERIAL_PORT;
<a name="l00047"></a>00047 }
<a name="l00048"></a>00048 <span class="comment">// Prepare the device control</span>
<a name="l00049"></a>00049 memset (&sp->dcb, 0, sizeof (DCB));
<a name="l00050"></a>00050 sp->dcb.DCBlength = <span class="keyword">sizeof</span> (DCB);
<a name="l00051"></a>00051 <span class="keywordflow">if</span> (!BuildCommDCBA (<span class="stringliteral">"baud=9600 data=8 parity=N stop=1"</span>, &sp->dcb)) {
<a name="l00052"></a>00052 uart_close (sp);
<a name="l00053"></a>00053 <span class="keywordflow">return</span> INVALID_SERIAL_PORT;
<a name="l00054"></a>00054 }
<a name="l00055"></a>00055 <span class="comment">// Update the active serial port</span>
<a name="l00056"></a>00056 <span class="keywordflow">if</span> (!SetCommState (sp->hPort, &sp->dcb)) {
<a name="l00057"></a>00057 uart_close (sp);
<a name="l00058"></a>00058 <span class="keywordflow">return</span> INVALID_SERIAL_PORT;
<a name="l00059"></a>00059 }
<a name="l00060"></a>00060
<a name="l00061"></a>00061 sp->ct.ReadIntervalTimeout = 30;
<a name="l00062"></a>00062 sp->ct.ReadTotalTimeoutMultiplier = 0;
<a name="l00063"></a>00063 sp->ct.ReadTotalTimeoutConstant = 30;
<a name="l00064"></a>00064 sp->ct.WriteTotalTimeoutMultiplier = 30;
<a name="l00065"></a>00065 sp->ct.WriteTotalTimeoutConstant = 0;
<a name="l00066"></a>00066
<a name="l00067"></a>00067 <span class="keywordflow">if</span> (!SetCommTimeouts (sp->hPort, &sp->ct)) {
<a name="l00068"></a>00068 uart_close (sp);
<a name="l00069"></a>00069 <span class="keywordflow">return</span> INVALID_SERIAL_PORT;
<a name="l00070"></a>00070 }
<a name="l00071"></a>00071
<a name="l00072"></a>00072 PurgeComm (sp->hPort, PURGE_RXABORT | PURGE_RXCLEAR);
<a name="l00073"></a>00073
<a name="l00074"></a>00074 <span class="keywordflow">return</span> sp;
<a name="l00075"></a>00075 }
<a name="l00076"></a>00076
<a name="l00077"></a>00077 <span class="keywordtype">void</span>
<a name="l00078"></a>00078 uart_close (<span class="keyword">const</span> serial_port sp)
<a name="l00079"></a>00079 {
<a name="l00080"></a>00080 <span class="keywordflow">if</span> (((serial_port_windows *) sp)->hPort != INVALID_HANDLE_VALUE) {
<a name="l00081"></a>00081 CloseHandle (((serial_port_windows *) sp)->hPort);
<a name="l00082"></a>00082 }
<a name="l00083"></a>00083 free (sp);
<a name="l00084"></a>00084 }
<a name="l00085"></a>00085
<a name="l00086"></a>00086 <span class="comment">// TODO Remove PN53x related timeout</span>
<a name="l00087"></a>00087 <span class="keywordtype">void</span>
<a name="l00088"></a>00088 uart_set_speed (serial_port sp, <span class="keyword">const</span> uint32_t uiPortSpeed)
<a name="l00089"></a>00089 {
<a name="l00090"></a>00090 serial_port_windows *spw;
<a name="l00091"></a>00091
<a name="l00092"></a>00092 DBG (<span class="stringliteral">"Serial port speed requested to be set to %d bauds."</span>, uiPortSpeed);
<a name="l00093"></a>00093 <span class="comment">// Set port speed (Input and Output)</span>
<a name="l00094"></a>00094 <span class="keywordflow">switch</span> (uiPortSpeed) {
<a name="l00095"></a>00095 <span class="keywordflow">case</span> 9600:
<a name="l00096"></a>00096 <span class="keywordflow">case</span> 19200:
<a name="l00097"></a>00097 <span class="keywordflow">case</span> 38400:
<a name="l00098"></a>00098 <span class="keywordflow">case</span> 57600:
<a name="l00099"></a>00099 <span class="keywordflow">case</span> 115200:
<a name="l00100"></a>00100 <span class="keywordflow">case</span> 230400:
<a name="l00101"></a>00101 <span class="keywordflow">case</span> 460800:
<a name="l00102"></a>00102 <span class="keywordflow">break</span>;
<a name="l00103"></a>00103 <span class="keywordflow">default</span>:
<a name="l00104"></a>00104 ERR(<span class="stringliteral">"Unable to set serial port speed to %d bauds. Speed value must be one of these constants: 9600 (default), 19200, 38400, 57600, 115200, 230400 or 460800."</span>, uiPortSpeed);
<a name="l00105"></a>00105 <span class="keywordflow">return</span>;
<a name="l00106"></a>00106 };
<a name="l00107"></a>00107 spw = (serial_port_windows *) sp;
<a name="l00108"></a>00108
<a name="l00109"></a>00109 <span class="comment">// Set timeouts</span>
<a name="l00110"></a>00110 <span class="comment">//printf ("UART_SPEED_T0_TIME (%d) = %d\n", uiPortSpeed, UART_SPEED_T0_TIME(uiPortSpeed));</span>
<a name="l00111"></a>00111 <span class="keywordtype">int</span> iTimeout = 200;
<a name="l00112"></a>00112 spw->ct.ReadIntervalTimeout = 2;
<a name="l00113"></a>00113 spw->ct.ReadTotalTimeoutMultiplier = 0;
<a name="l00114"></a>00114 spw->ct.ReadTotalTimeoutConstant = iTimeout;
<a name="l00115"></a>00115 spw->ct.WriteTotalTimeoutMultiplier = iTimeout;
<a name="l00116"></a>00116 spw->ct.WriteTotalTimeoutConstant = 0;
<a name="l00117"></a>00117
<a name="l00118"></a>00118 <span class="keywordflow">if</span> (!SetCommTimeouts (spw->hPort, &spw->ct)) {
<a name="l00119"></a>00119 ERR (<span class="stringliteral">"Unable to apply new timeout settings."</span>);
<a name="l00120"></a>00120 <span class="keywordflow">return</span>;
<a name="l00121"></a>00121 }
<a name="l00122"></a>00122
<a name="l00123"></a>00123 <span class="comment">// Set baud rate</span>
<a name="l00124"></a>00124 spw->dcb.BaudRate = uiPortSpeed;
<a name="l00125"></a>00125 <span class="keywordflow">if</span> (!SetCommState (spw->hPort, &spw->dcb)) {
<a name="l00126"></a>00126 ERR (<span class="stringliteral">"Unable to apply new speed settings."</span>);
<a name="l00127"></a>00127 <span class="keywordflow">return</span>;
<a name="l00128"></a>00128 }
<a name="l00129"></a>00129 PurgeComm (spw->hPort, PURGE_RXABORT | PURGE_RXCLEAR);
<a name="l00130"></a>00130 }
<a name="l00131"></a>00131
<a name="l00132"></a>00132 uint32_t
<a name="l00133"></a>00133 uart_get_speed (<span class="keyword">const</span> serial_port sp)
<a name="l00134"></a>00134 {
<a name="l00135"></a>00135 <span class="keyword">const</span> serial_port_windows *spw = (serial_port_windows *) sp;
<a name="l00136"></a>00136 <span class="keywordflow">if</span> (!GetCommState (spw->hPort, (serial_port) & spw->dcb))
<a name="l00137"></a>00137 <span class="keywordflow">return</span> spw->dcb.BaudRate;
<a name="l00138"></a>00138
<a name="l00139"></a>00139 <span class="keywordflow">return</span> 0;
<a name="l00140"></a>00140 }
<a name="l00141"></a>00141
<a name="l00142"></a>00142 <span class="keywordtype">int</span>
<a name="l00143"></a>00143 <a class="code" href="uart_8h.html#a51a4c4c363a0de96e1e9df399ae8b2f4" title="Receive data from UART and copy data to pbtRx.">uart_receive</a> (serial_port sp, byte_t * pbtRx, <span class="keywordtype">size_t</span> * pszRx)
<a name="l00144"></a>00144 {
<a name="l00145"></a>00145 <span class="keywordflow">if</span> (!ReadFile (((serial_port_windows *) sp)->hPort, pbtRx, (DWORD)(*pszRx), (LPDWORD) pszRx, NULL)) {
<a name="l00146"></a>00146 <span class="keywordflow">return</span> DEIO;
<a name="l00147"></a>00147 }
<a name="l00148"></a>00148 <span class="keywordflow">if</span> (!*pszRx)
<a name="l00149"></a>00149 <span class="keywordflow">return</span> DEIO;
<a name="l00150"></a>00150 <span class="keywordflow">return</span> 0;
<a name="l00151"></a>00151 }
<a name="l00152"></a>00152
<a name="l00153"></a>00153 <span class="keywordtype">int</span>
<a name="l00154"></a>00154 <a class="code" href="uart_8h.html#a39c415b8d6fa14b2168f2a35cbac48d0" title="Send pbtTx content to UART.">uart_send</a> (serial_port sp, <span class="keyword">const</span> byte_t * pbtTx, <span class="keyword">const</span> <span class="keywordtype">size_t</span> szTx)
<a name="l00155"></a>00155 {
<a name="l00156"></a>00156 DWORD dwTxLen = 0;
<a name="l00157"></a>00157 <span class="keywordflow">if</span> (!WriteFile (((serial_port_windows *) sp)->hPort, pbtTx, szTx, &dwTxLen, NULL)) {
<a name="l00158"></a>00158 <span class="keywordflow">return</span> DEIO;
<a name="l00159"></a>00159 }
<a name="l00160"></a>00160 <span class="keywordflow">if</span> (!dwTxLen)
<a name="l00161"></a>00161 <span class="keywordflow">return</span> DEIO;
<a name="l00162"></a>00162 <span class="keywordflow">return</span> 0;
<a name="l00163"></a>00163 }
<a name="l00164"></a>00164
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