diff -r 000000000000 -r c6b0df440bee dbgagents/trkagent/engine/TrkDccCommPort.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dbgagents/trkagent/engine/TrkDccCommPort.cpp	Tue Mar 02 10:33:16 2010 +0530
@@ -0,0 +1,252 @@
+/*
+* Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description: 
+*
+*/
+
+
+#include <e32cons.h>
+#include <f32file.h>
+
+#include "TrkConnData.h"
+#include "TrkDccCommPort.h"
+#include "TrkFramingLayer.h"
+
+_LIT(KSendErrMsg, "Failed to write to the DCC channel");
+
+//
+// Default comm values
+//
+
+
+//
+// Static helper functions
+//
+
+//
+//
+// CTrkDccCommPort implementation
+//
+//
+
+//
+// CTrkDccCommPort constructor
+//
+CTrkDccCommPort::CTrkDccCommPort()
+	: CTrkCommPort(CActive::EPriorityStandard),
+	  iConnected(EFalse),
+	  iListening(EFalse),
+	  iLineNumber(0),
+	  iLddLoaded(EFalse)
+{
+}
+
+//
+// CTrkDccCommPort::ConstructL
+//
+void CTrkDccCommPort::ConstructL(TTrkConnData& aTrkConnData, TDes& aErrorMessage)
+{
+
+	iLDD = aTrkConnData.iLDD;
+	iUnitNumber = aTrkConnData.iPortNumber;
+
+	if (!iLDD.Size())
+	{
+		aErrorMessage.Format(_L("LDD not specified in init file\r\n"));		
+		User::Leave(KErrCorrupt);
+	}
+
+	
+}
+
+//
+// CTrkDccCommPort destructor
+//
+CTrkDccCommPort::~CTrkDccCommPort()
+{
+	if (iLddLoaded)	
+	{
+		//cancel the read request
+		iDccDriver.ReadCancel();
+		iDccDriver.Close();
+		
+		TInt err = User::FreeLogicalDevice(iLDD);
+		if (KErrNone != err)
+			User::Panic(_L("FreeLogicalDevice failed"), err);
+			
+		iLddLoaded = EFalse;
+	}
+
+}
+
+//
+// CTrkDccCommPort::NewL
+//
+CTrkDccCommPort* CTrkDccCommPort::NewL(TTrkConnData& aTrkConnData, TDes& aErrorMessage)
+{
+	CTrkDccCommPort* self = new(ELeave) CTrkDccCommPort;
+	CleanupStack::PushL(self);
+	self->ConstructL(aTrkConnData, aErrorMessage);
+	CleanupStack::Pop(self);
+	return self;
+}
+
+//
+// CTrkDccCommPort::OpenPortL
+//
+// Open the serial type communications port
+//
+void CTrkDccCommPort::OpenPortL()
+{
+	TInt error = KErrNone;
+
+	// make sure the LDD is not already loaded
+	User::FreeLogicalDevice(iLDD);
+
+	error = User::LoadLogicalDevice(iLDD);
+	if ((KErrAlreadyExists != error) && (KErrNone != error))
+		ReportAndLeaveIfErrorL(error, _L("Failed to load dcc logical device."));
+
+	error = iDccDriver.Open();
+	if (KErrNone != error)
+		ReportAndLeaveIfErrorL(error, _L("Failed to open dcc logical device."));
+	
+	iLddLoaded = ETrue;
+	
+	
+	_LIT(KDCCMSG, "LDD: TrkDccDriver\r\nPort number: 42\r\n");
+	
+	iConnectionMessage = KDCCMSG;
+}
+
+//
+// CTrkDccCommPort::ClosePort
+//
+// Close the communications port
+//
+void CTrkDccCommPort::ClosePort()
+{
+	Cancel();
+	
+	if (iLddLoaded)
+	{
+		//cancel the read request
+		iDccDriver.ReadCancel();		
+		iDccDriver.Close();
+		
+		TInt err = User::FreeLogicalDevice(iLDD);
+		if (KErrNone != err)
+			User::Panic(_L("FreeLogicalDevice failed"), err);
+
+		iLddLoaded = EFalse;			
+	}
+
+}
+
+//
+// CTrkDccCommPort::SendDataL
+//
+// Write data to the serial type port
+//
+void CTrkDccCommPort::SendDataL(const TDesC8& aBuffer)
+{
+	TInt err = iDccDriver.Write(aBuffer);
+	
+	ReportAndLeaveIfErrorL(err, KSendErrMsg);
+}
+
+//
+// CTrkDccCommPort::Listen
+//
+// Start listening for data coming into the serial type communications port
+//
+void CTrkDccCommPort::Listen(CTrkFramingLayer *aFramingLayer)
+{
+	iFramingLayer = aFramingLayer;
+	CActiveScheduler::Add(this);
+	IssueReadRequest();
+	iListening = ETrue;
+}
+
+//
+// CTrkDccCommPort::StopListening
+//
+// Stop listening for data coming into the serial type communications port
+//
+void CTrkDccCommPort::StopListening()
+{
+	if (iListening)
+	{
+		Cancel();
+		Deque();
+	}
+	
+	iListening = EFalse;
+}
+
+//
+// CTrkDccCommPort::ReportAndLeaveIfErrorL
+//
+// If an error occurred, print the error information to the screen and bail out
+//
+void CTrkDccCommPort::ReportAndLeaveIfErrorL(TInt aError, const TDesC& aDesc)
+{
+	if (KErrNone != aError)
+	{
+		iErrorMessage.Format(_L("%S\r\nError Code: %d\r\n"), &aDesc, aError);
+		User::Leave(aError);
+	}
+}
+
+
+//
+// CTrkDccCommPort::IssueReadRequest
+//
+// Wait for data to come into the communications port
+//
+void CTrkDccCommPort::IssueReadRequest()
+{
+	iNextReadChar = 0;
+	iDccDriver.ReadOneOrMore(iStatus, iReceivedChars);
+	SetActive();
+}
+
+//
+// CTrkDccCommPort::DoCancel
+//
+// Cancel the request for data from the communications port
+//
+void CTrkDccCommPort::DoCancel()
+{
+	iDccDriver.ReadCancel();
+}
+
+//
+// CTrkDccCommPort::RunL
+//
+// Called when data comes into the communications port
+//
+void CTrkDccCommPort::RunL()
+{
+	// pass the data onto the framing layer
+	if (iStatus.Int() == KErrNone)
+	{
+		while (iNextReadChar < iReceivedChars.Length())
+			iFramingLayer->HandleByte(iReceivedChars[iNextReadChar++]);
+		//iDccDriver.Write(iReceivedChars);
+	}
+	// continue waiting for data
+	IssueReadRequest();
+}
+