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// Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of the License "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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// e32\drivers\iic_transaction.cpp
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// IIC Transaction API Implementation
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//
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#include <drivers/iic_transaction.h>
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#include <drivers/iic_channel.h>
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EXPORT_C void TIicBusSlaveCallback::DfcFunc(TAny* aPtr)
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{
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TIicBusSlaveCallback* pCb = (TIicBusSlaveCallback*) aPtr;
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// pCb can be NULL if a client corrupt it after the dfc has been queued
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__ASSERT_DEBUG(pCb != NULL, Kern::Fault(KIicPanic,__LINE__));
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DIicBusChannelSlave* chan = pCb->iChannel;
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__ASSERT_DEBUG(chan != NULL, Kern::Fault(KIicPanic,__LINE__));
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chan->ProcessData(pCb->iTrigger, pCb); // Call PSL to fill in iReturn, iRxWords and/or iTxWords
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//
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// Only invoke the client's callback (and update the state machine) if asynchronous channel capture has
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// completed, or if one of the requested triggers has occurred or if a bus error has been witnessed
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TInt8 callbackTrig = 0;
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TInt callbackRet = 0;
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TInt nextSteps = chan->UpdateReqTrig(callbackTrig, callbackRet);
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if(nextSteps & DIicBusChannelSlave::EStopTimer)
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{
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chan->StopTimer();
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}
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if(nextSteps & DIicBusChannelSlave::EInvokeCb)
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{
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(pCb->iCallback)(pCb->iChannelId, callbackRet, (TInt)callbackTrig, pCb->iRxWords, pCb->iTxWords, pCb->iParam);
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// Callback now processed, so re-initialise callback object members
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pCb->iTrigger = 0;
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pCb->iReturn = KErrNone;
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pCb->iRxWords = 0;
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pCb->iTxWords = 0;
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}
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if(nextSteps & DIicBusChannelSlave::EStartTimer)
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{
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chan->StartTimerByState();
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}
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}
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