// Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).

 // All rights reserved.

 // This component and the accompanying materials are made available

 // under the terms of the License "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:

 // e32\drivers\iic_transaction.cpp

 // IIC Transaction API Implementation

 //

 #include <drivers/iic_transaction.h>

 #include <drivers/iic_channel.h>

 EXPORT_C void TIicBusSlaveCallback::DfcFunc(TAny* aPtr)

     {

     TIicBusSlaveCallback* pCb = (TIicBusSlaveCallback*) aPtr;

 	// pCb can be NULL if a client corrupt it after the dfc has been queued

     __ASSERT_DEBUG(pCb != NULL, Kern::Fault(KIicPanic,__LINE__));

 	DIicBusChannelSlave* chan = pCb->iChannel;

 	__ASSERT_DEBUG(chan != NULL, Kern::Fault(KIicPanic,__LINE__));

 	chan->ProcessData(pCb->iTrigger, pCb); // Call PSL to fill in iReturn, iRxWords and/or iTxWords

 	//

 	// Only invoke the client's callback (and update the state machine) if asynchronous channel capture has

 	// completed, or if one of the requested triggers has occurred or if a bus error has been witnessed

 	TInt8 callbackTrig = 0;

 	TInt callbackRet = 0;

 	TInt nextSteps = chan->UpdateReqTrig(callbackTrig, callbackRet);

 	if(nextSteps & DIicBusChannelSlave::EStopTimer)

 		{

 		chan->StopTimer();

 		}

 	if(nextSteps & DIicBusChannelSlave::EInvokeCb)

 		{

 		(pCb->iCallback)(pCb->iChannelId, callbackRet, (TInt)callbackTrig, pCb->iRxWords, pCb->iTxWords, pCb->iParam);

 		// Callback now processed, so re-initialise callback object members

 		pCb->iTrigger = 0;

 		pCb->iReturn = KErrNone;

 		pCb->iRxWords = 0;

 		pCb->iTxWords = 0;

 		}

 	if(nextSteps & DIicBusChannelSlave::EStartTimer)

 		{

 		chan->StartTimerByState();

 		}

     }