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Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/driver1__pdd_8cpp_source.html
author Dominic Pinkman <dominic.pinkman@nokia.com>
Fri, 13 Aug 2010 16:47:46 +0100
changeset 14 578be2adaf3e
parent 6 43e37759235e
permissions -rw-r--r--
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
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<title>TB9.2 Example Applications: examples/Base/IPC/AdvancedClientServerExample/driver/driver1_pdd.cpp Source File</title>
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<link href="tabs.css" rel="stylesheet" type="text/css"/>
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<link href="doxygen.css" rel="stylesheet" type="text/css"/>
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</head>
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<body>
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<!-- Generated by Doxygen 1.6.2 -->
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<h1>examples/Base/IPC/AdvancedClientServerExample/driver/driver1_pdd.cpp</h1><a href="driver1__pdd_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).</span>
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<a name="l00002"></a>00002 <span class="comment">// All rights reserved.</span>
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<a name="l00003"></a>00003 <span class="comment">// This component and the accompanying materials are made available</span>
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<a name="l00004"></a>00004 <span class="comment">// under the terms of &quot;Eclipse Public License v1.0&quot;</span>
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<a name="l00005"></a>00005 <span class="comment">// which accompanies this distribution, and is available</span>
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<a name="l00006"></a>00006 <span class="comment">// at the URL &quot;http://www.eclipse.org/legal/epl-v10.html&quot;.</span>
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<a name="l00007"></a>00007 <span class="comment">//</span>
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<a name="l00008"></a>00008 <span class="comment">// Initial Contributors:</span>
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<a name="l00009"></a>00009 <span class="comment">// Nokia Corporation - initial contribution.</span>
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<a name="l00010"></a>00010 <span class="comment">//</span>
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<a name="l00011"></a>00011 <span class="comment">// Contributors:</span>
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<a name="l00012"></a>00012 <span class="comment">//</span>
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<a name="l00013"></a>00013 <span class="comment">// Description:</span>
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<a name="l00014"></a>00014 <span class="comment">// Example Physical Device Driver</span>
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<a name="l00015"></a>00015 <span class="comment">//</span>
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<a name="l00016"></a>00016
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<a name="l00017"></a>00017
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<a name="l00018"></a>00018
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<a name="l00023"></a>00023 <span class="preprocessor">#include &lt;kern_priv.h&gt;</span>
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<a name="l00024"></a>00024 <span class="preprocessor">#include &quot;<a class="code" href="driver1_8h.html">driver1.h</a>&quot;</span>
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<a name="l00025"></a>00025 <span class="preprocessor">#include &quot;<a class="code" href="driver1__dev_8h.html">driver1_dev.h</a>&quot;</span>
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<a name="l00026"></a>00026
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<a name="l00030"></a>00030 <span class="keyword">class </span>DDevice1PddFactory : <span class="keyword">public</span> DPhysicalDevice
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<a name="l00031"></a>00031         {
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<a name="l00032"></a>00032 <span class="keyword">public</span>:
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<a name="l00033"></a>00033         DDevice1PddFactory();
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<a name="l00034"></a>00034
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<a name="l00035"></a>00035         <span class="comment">// Inherited from DPhysicalDevice</span>
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<a name="l00036"></a>00036         <span class="keyword">virtual</span> TInt Install();
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<a name="l00037"></a>00037         <span class="keyword">virtual</span> <span class="keywordtype">void</span> GetCaps(TDes8&amp; aDes) <span class="keyword">const</span>;
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<a name="l00038"></a>00038         <span class="keyword">virtual</span> TInt Create(DBase*&amp; aChannel, TInt aUnit, <span class="keyword">const</span> TDesC8* aInfo, <span class="keyword">const</span> TVersion&amp; aVer);
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<a name="l00039"></a>00039         <span class="keyword">virtual</span> TInt Validate(TInt aUnit, <span class="keyword">const</span> TDesC8* aInfo, <span class="keyword">const</span> TVersion&amp; aVer);
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<a name="l00040"></a>00040 <span class="keyword">public</span>:
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<a name="l00041"></a>00041         TInt iHardwareInUse;
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<a name="l00042"></a>00042 <span class="keyword">private</span>:
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<a name="l00046"></a>00046         <span class="keyword">enum</span> TMinimumLDDVersion
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<a name="l00047"></a>00047                 {
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<a name="l00048"></a>00048                 EMinimumLddMajorVersion=1,
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<a name="l00049"></a>00049                 EMinimumLddMinorVersion=0,
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<a name="l00050"></a>00050                 EMinimumLddBuild=0 <span class="comment">//Not used</span>
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<a name="l00051"></a>00051                 };
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<a name="l00052"></a>00052         };
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<a name="l00053"></a>00053
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<a name="l00054"></a>00054 <span class="comment">// Name for PDD, must match LDD name with a &#39;.&#39; and distinguishing name appended</span>
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<a name="l00055"></a>00055 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KDriver1PddName,<span class="stringliteral">&quot;DRIVER1.template&quot;</span>);
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<a name="l00056"></a>00056
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<a name="l00060"></a>00060 <span class="keyword">class </span>DDriver1Device : <span class="keyword">public</span> <a class="code" href="class_d_driver1.html">DDriver1</a>
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<a name="l00061"></a>00061         {
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<a name="l00062"></a>00062 <span class="keyword">public</span>:
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<a name="l00063"></a>00063         DDriver1Device(DDevice1PddFactory* aFactory);
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<a name="l00064"></a>00064         ~DDriver1Device();
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<a name="l00065"></a>00065         TInt DoCreate();
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<a name="l00066"></a>00066
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<a name="l00067"></a>00067         <span class="comment">// Inherited from DDriver1. These functions are called by the LDD.</span>
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<a name="l00068"></a>00068         <span class="keyword">virtual</span> TInt BufferSize() <span class="keyword">const</span>;
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<a name="l00069"></a>00069         <span class="keyword">virtual</span> TInt Speed() <span class="keyword">const</span>;
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<a name="l00070"></a>00070         <span class="keyword">virtual</span> TInt SetSpeed(TInt aSpeed);
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<a name="l00071"></a>00071         <span class="keyword">virtual</span> TInt SendData(<span class="keyword">const</span> TDesC8&amp; aData);
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<a name="l00072"></a>00072         <span class="keyword">virtual</span> <span class="keywordtype">void</span> SendDataCancel();
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<a name="l00073"></a>00073         <span class="keyword">virtual</span> TInt ReceiveData(TDes8&amp; aBuffer);
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<a name="l00074"></a>00074         <span class="keyword">virtual</span> <span class="keywordtype">void</span> ReceiveDataCancel();
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<a name="l00075"></a>00075 <span class="keyword">private</span>:
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<a name="l00076"></a>00076         <span class="keyword">static</span> <span class="keywordtype">void</span> SendDataTimerCallback(TAny* aPtr);
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<a name="l00077"></a>00077         <span class="keywordtype">void</span> SendDataCallback();
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<a name="l00078"></a>00078         <span class="keyword">static</span> <span class="keywordtype">void</span> ReceiveDataTimerCallback(TAny* aPtr);
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<a name="l00079"></a>00079         <span class="keywordtype">void</span> ReceiveDataCallback();
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<a name="l00080"></a>00080 <span class="keyword">private</span>:
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<a name="l00081"></a>00081         DDevice1PddFactory* iFactory;
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<a name="l00082"></a>00082         TInt iSpeed;
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<a name="l00083"></a>00083         NTimer iSendDataTimer;
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<a name="l00084"></a>00084         NTimer iReceiveDataTimer;
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<a name="l00085"></a>00085         TBuf8&lt;256&gt; iBuffer;
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<a name="l00086"></a>00086         TDes8* iReceiveBuffer;
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<a name="l00087"></a>00087         };
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<a name="l00088"></a>00088 <span class="comment">//</span>
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<a name="l00089"></a>00089 <span class="comment">// DDevice1PddFactory</span>
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<a name="l00090"></a>00090 <span class="comment">//</span>
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<a name="l00091"></a>00091
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<a name="l00096"></a><a class="code" href="driver1__pdd_8cpp.html#a061eed382be7e15a773e024537b23677">00096</a> <a class="code" href="driver1__pdd_8cpp.html#a061eed382be7e15a773e024537b23677">DECLARE_STANDARD_PDD</a>()
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<a name="l00097"></a>00097         {
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<a name="l00098"></a>00098         <span class="keywordflow">return</span> <span class="keyword">new</span> DDevice1PddFactory;
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<a name="l00099"></a>00099         }
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<a name="l00100"></a>00100
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<a name="l00101"></a>00101 DDevice1PddFactory::DDevice1PddFactory()
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<a name="l00102"></a>00102         {
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<a name="l00103"></a>00103         <span class="comment">// Sets version number for this device</span>
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<a name="l00104"></a>00104         iVersion=<a class="code" href="class_r_driver1.html#a7d1f08b59801b5890fb77666e14d5e8f">RDriver1::VersionRequired</a>();
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<a name="l00105"></a>00105         }
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<a name="l00106"></a>00106
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<a name="l00112"></a>00112 TInt DDevice1PddFactory::Install()
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<a name="l00113"></a>00113         {
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<a name="l00114"></a>00114         <span class="keywordflow">return</span> SetName(&amp;KDriver1PddName);
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<a name="l00115"></a>00115         }
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   104
 
<a name="l00116"></a>00116
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<a name="l00122"></a>00122 <span class="keywordtype">void</span> DDevice1PddFactory::GetCaps(TDes8&amp; aDes)<span class="keyword"> const</span>
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<a name="l00123"></a>00123 <span class="keyword">        </span>{
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<a name="l00124"></a>00124         <span class="comment">// Create a capabilities object</span>
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<a name="l00125"></a>00125         <a class="code" href="class_d_driver1_1_1_t_caps.html">DDriver1::TCaps</a> caps;
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<a name="l00126"></a>00126         caps.iVersion = iVersion;
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<a name="l00127"></a>00127         <span class="comment">// Zero the buffer</span>
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<a name="l00128"></a>00128         TInt maxLen = aDes.MaxLength();
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<a name="l00129"></a>00129         aDes.FillZ(maxLen);
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<a name="l00130"></a>00130         <span class="comment">// Copy capabilities</span>
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<a name="l00131"></a>00131         TInt size=<span class="keyword">sizeof</span>(caps);
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<a name="l00132"></a>00132         <span class="keywordflow">if</span>(size&gt;maxLen)
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<a name="l00133"></a>00133                 size=maxLen;
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<a name="l00134"></a>00134         aDes.Copy((TUint8*)&amp;caps,size);
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<a name="l00135"></a>00135         }
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   119
 
<a name="l00136"></a>00136
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<a name="l00148"></a>00148 TInt DDevice1PddFactory::Create(DBase*&amp; aChannel, TInt aUnit, <span class="keyword">const</span> TDesC8* aInfo, <span class="keyword">const</span> TVersion&amp; aVer)
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<a name="l00149"></a>00149         {
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<a name="l00150"></a>00150         <span class="comment">// Ignore the parameters we aren&#39;t interested in...</span>
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<a name="l00151"></a>00151         (void)aUnit;
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<a name="l00152"></a>00152         (void)aInfo;
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<a name="l00153"></a>00153         (void)aVer;
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<a name="l00154"></a>00154
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<a name="l00155"></a>00155         <span class="comment">// Create a new physical channel</span>
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<a name="l00156"></a>00156         DDriver1Device* device=<span class="keyword">new</span> DDriver1Device(<span class="keyword">this</span>);
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<a name="l00157"></a>00157         aChannel=device;
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<a name="l00158"></a>00158         <span class="keywordflow">if</span> (!device)
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<a name="l00159"></a>00159                 <span class="keywordflow">return</span> KErrNoMemory;
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<a name="l00160"></a>00160         <span class="keywordflow">return</span> device-&gt;DoCreate();
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<a name="l00161"></a>00161         }
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   134
 
<a name="l00162"></a>00162
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<a name="l00173"></a>00173 TInt DDevice1PddFactory::Validate(TInt aUnit, <span class="keyword">const</span> TDesC8* aInfo, <span class="keyword">const</span> TVersion&amp; aVer)
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<a name="l00174"></a>00174         {
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   137
 
<a name="l00175"></a>00175         <span class="comment">// Check version numbers</span>
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<a name="l00176"></a>00176         <span class="keywordflow">if</span> ((!Kern::QueryVersionSupported(iVersion,aVer)) || (!Kern::QueryVersionSupported(aVer,TVersion(EMinimumLddMajorVersion,EMinimumLddMinorVersion,EMinimumLddBuild))))
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<a name="l00177"></a>00177                 <span class="keywordflow">return</span> KErrNotSupported;
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<a name="l00178"></a>00178
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   141
 
<a name="l00179"></a>00179         <span class="comment">// We don&#39;t support units</span>
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<a name="l00180"></a>00180     <span class="keywordflow">if</span> (aUnit != -1)
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<a name="l00181"></a>00181         <span class="keywordflow">return</span> KErrNotSupported;
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<a name="l00182"></a>00182
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   145
 
<a name="l00183"></a>00183         <span class="comment">// Ignore extra info, (this could be used for validation purposes).</span>
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<a name="l00184"></a>00184         <span class="comment">// Note, aInfo is a pointer to a descriptor in user memory, therefore safe methods should</span>
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<a name="l00185"></a>00185         <span class="comment">// be used for reading its contents e.g. using Kern::KUDesGet()</span>
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<a name="l00186"></a>00186         (void)aInfo;
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<a name="l00187"></a>00187
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<a name="l00188"></a>00188         <span class="comment">// OK</span>
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<a name="l00189"></a>00189         <span class="keywordflow">return</span> KErrNone;
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<a name="l00190"></a>00190         }
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<a name="l00191"></a>00191
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<a name="l00195"></a>00195 DDriver1Device::DDriver1Device(DDevice1PddFactory* aFactory)
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<a name="l00196"></a>00196         :       iFactory(aFactory),
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<a name="l00197"></a>00197                 iSpeed(100000),  <span class="comment">// 100000us (100ms) per byte</span>
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<a name="l00198"></a>00198                 iSendDataTimer(SendDataTimerCallback,this),
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<a name="l00199"></a>00199                 iReceiveDataTimer(ReceiveDataTimerCallback,this)
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   159
 
<a name="l00200"></a>00200         {
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<a name="l00201"></a>00201         }
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<a name="l00202"></a>00202
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<a name="l00206"></a>00206 DDriver1Device::~DDriver1Device()
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<a name="l00207"></a>00207         {
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<a name="l00208"></a>00208         <span class="comment">// Driver no longer using hardware resources</span>
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<a name="l00209"></a>00209         NKern::LockedDec(iFactory-&gt;iHardwareInUse);
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<a name="l00210"></a>00210         }
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<a name="l00211"></a>00211
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<a name="l00212"></a>00212 TInt DDriver1Device::DoCreate()
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<a name="l00213"></a>00213         {
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<a name="l00214"></a>00214         <span class="comment">// Claim the hardware resources by incrementing iHardwareInUse.</span>
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<a name="l00215"></a>00215         <span class="comment">// Must do this before any other failure can happen in this function so that</span>
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<a name="l00216"></a>00216         <span class="comment">// the destructor can safely decrement iHardwareInUse.</span>
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<a name="l00217"></a>00217         <span class="comment">//</span>
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<a name="l00218"></a>00218         <span class="comment">// This method of ensuring hardware is only in use by one driver at a time</span>
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<a name="l00219"></a>00219         <span class="comment">// wouldn&#39;t be needed if the driver claimed real hardware resources which</span>
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<a name="l00220"></a>00220         <span class="comment">// could only be used once. E.g. binding to an interrupt.</span>
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<a name="l00221"></a>00221         <span class="keywordflow">if</span>(NKern::LockedInc(iFactory-&gt;iHardwareInUse))
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<a name="l00222"></a>00222                 <span class="keywordflow">return</span> KErrInUse;
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<a name="l00223"></a>00223
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<a name="l00224"></a>00224         <span class="comment">// Other setup goes here</span>
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<a name="l00225"></a>00225         <span class="keywordflow">return</span> KErrNone;
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<a name="l00226"></a>00226         }
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<a name="l00230"></a>00230 TInt DDriver1Device::BufferSize()<span class="keyword"> const</span>
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<a name="l00231"></a>00231 <span class="keyword">        </span>{
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<a name="l00232"></a>00232         <span class="keywordflow">return</span> iBuffer.MaxSize();
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<a name="l00233"></a>00233         }
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<a name="l00234"></a>00234
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<a name="l00238"></a>00238 TInt DDriver1Device::Speed()<span class="keyword"> const</span>
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<a name="l00239"></a>00239 <span class="keyword">        </span>{
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<a name="l00240"></a>00240         <span class="keywordflow">return</span> iSpeed;
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<a name="l00241"></a>00241         }
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<a name="l00242"></a>00242
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<a name="l00247"></a>00247 TInt DDriver1Device::SetSpeed(TInt aSpeed)
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   194
 
<a name="l00248"></a>00248         {
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<a name="l00249"></a>00249         <span class="keywordflow">if</span>(aSpeed&lt;=0)
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<a name="l00250"></a>00250                 <span class="keywordflow">return</span> KErrArgument;
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<a name="l00251"></a>00251         iSpeed = aSpeed;
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<a name="l00252"></a>00252         <span class="keywordflow">return</span> KErrNone;
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<a name="l00253"></a>00253         }
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   200
 
<a name="l00254"></a>00254
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   201
 
<a name="l00255"></a>00255 <span class="comment">// Methods for processing &#39;SendData&#39;</span>
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<a name="l00256"></a>00256 <span class="comment">//</span>
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<a name="l00260"></a>00260 <span class="comment"></span>TInt DDriver1Device::SendData(<span class="keyword">const</span> TDesC8&amp; aData)
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<a name="l00261"></a>00261         {
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<a name="l00262"></a>00262         <span class="comment">// Save the last part of the data to &#39;send&#39;, we will pretend to &#39;receive&#39; this later</span>
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<a name="l00263"></a>00263         iBuffer=aData.Right(iBuffer.MaxSize());
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<a name="l00264"></a>00264         <span class="comment">// Pretend to send the data by waiting for iSpeed micro-seconds per byte...</span>
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<a name="l00265"></a>00265         iSendDataTimer.OneShot(aData.Size()*iSpeed/NKern::TickPeriod());
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<a name="l00266"></a>00266         <span class="keywordflow">return</span> KErrNone;
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<a name="l00267"></a>00267         }
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<a name="l00268"></a>00268
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<a name="l00272"></a>00272 <span class="keywordtype">void</span> DDriver1Device::SendDataCancel()
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<a name="l00273"></a>00273         {
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<a name="l00274"></a>00274         <span class="comment">// Stop the timer we were using to pretend we were processing the send.</span>
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<a name="l00275"></a>00275         iSendDataTimer.Cancel();
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<a name="l00276"></a>00276         }
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<a name="l00277"></a>00277
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<a name="l00282"></a>00282 <span class="keywordtype">void</span> DDriver1Device::SendDataTimerCallback(TAny* aPtr)
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<a name="l00283"></a>00283         {
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<a name="l00284"></a>00284         <span class="comment">// Just forward callback to non-static callback function</span>
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<a name="l00285"></a>00285         ((DDriver1Device*)aPtr)-&gt;SendDataCallback();
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<a name="l00286"></a>00286         }
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<a name="l00287"></a>00287
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<a name="l00291"></a>00291 <span class="keywordtype">void</span> DDriver1Device::SendDataCallback()
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<a name="l00292"></a>00292         {
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<a name="l00293"></a>00293         <span class="comment">// Tell LDD we&#39;ve finished</span>
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<a name="l00294"></a>00294         iLdd-&gt;SendDataComplete(KErrNone);
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<a name="l00295"></a>00295         }
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<a name="l00296"></a>00296
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<a name="l00297"></a>00297 <span class="comment">//</span>
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<a name="l00298"></a>00298 <span class="comment">// Methods for processing &#39;ReceiveData&#39;</span>
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<a name="l00299"></a>00299 <span class="comment">//</span>
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<a name="l00303"></a>00303 <span class="comment"></span>TInt DDriver1Device::ReceiveData(TDes8&amp; aBuffer)
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<a name="l00304"></a>00304         {
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<a name="l00305"></a>00305         <span class="comment">// Save a pointer to the buffer we need to put the &#39;received&#39; data in</span>
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<a name="l00306"></a>00306         iReceiveBuffer=&amp;aBuffer;
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<a name="l00307"></a>00307         <span class="comment">// Pretend to receive the data by waiting for iSpeed micro-seconds per byte...</span>
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<a name="l00308"></a>00308         iReceiveDataTimer.OneShot(iBuffer.Size()*iSpeed/NKern::TickPeriod());
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<a name="l00309"></a>00309         <span class="keywordflow">return</span> KErrNone;
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<a name="l00310"></a>00310         }
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<a name="l00314"></a>00314 <span class="keywordtype">void</span> DDriver1Device::ReceiveDataCancel()
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<a name="l00315"></a>00315         {
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<a name="l00316"></a>00316         <span class="comment">// Stop the timer we were using to pretend we were processing the receive</span>
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<a name="l00317"></a>00317         iReceiveDataTimer.Cancel();
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<a name="l00318"></a>00318         }
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<a name="l00323"></a>00323 <span class="keywordtype">void</span> DDriver1Device::ReceiveDataTimerCallback(TAny* aPtr)
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<a name="l00324"></a>00324         {
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<a name="l00325"></a>00325         <span class="comment">// Just forward callback to non-static callback function</span>
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<a name="l00326"></a>00326         ((DDriver1Device*)aPtr)-&gt;ReceiveDataCallback();
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<a name="l00327"></a>00327         }
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<a name="l00331"></a>00331 <span class="keywordtype">void</span> DDriver1Device::ReceiveDataCallback()
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<a name="l00332"></a>00332         {
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<a name="l00333"></a>00333         <span class="comment">// Pretend the data we have received is that saved in iBuffer when we last did a send</span>
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<a name="l00334"></a>00334         *iReceiveBuffer=iBuffer;
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<a name="l00335"></a>00335         <span class="comment">// Tell LDD we&#39;ve finished</span>
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<a name="l00336"></a>00336         iLdd-&gt;ReceiveDataComplete(KErrNone);
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<a name="l00337"></a>00337         }
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</pre></div></div>
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<hr size="1"/><address style="text-align: right;"><small>Generated by&nbsp;
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<a href="http://www.doxygen.org/index.html">
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<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.2 </small></address>
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</body>
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</html>
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