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//
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// * Copyright 2004 Neusoft America Inc.
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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 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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// * Contributors:
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// * Keith Collins (Neusoft America Inc.) original software development and additional code and modifications.
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// * Thomas Gahagen (Neusoft America Inc.) additional code and modifications.
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// * Zhen Yuan (Neusoft America Inc.) additional code and modifications.
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// *
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// * Description: This file contains the implementation for class CCommFrameReaderAo.
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// * Class CCommFrameReaderAo is used to request a read from the serial port LDD.
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// * Class CommFrameReaderAo is an active object and is run by the active
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// * scheduler when the LDD has completed the read request.
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//
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// CommFrameReaderAo.cpp
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/** @file CommFrameReaderAo.cpp
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*
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* The file contains the implementation for class CCommFrameReaderAo.
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* Class CCommFrameReaderAo is used to request a read from the serial port LDD.
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* Class CommFrameReaderAo is an active object and is run by the active
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* scheduler when the LDD has completed the read request
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*/
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// Need to add code to package together a frame and then send the
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// complete frame to the Mux object for defragmentation into a client msg.
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#include "CommFrameReaderAo.h"
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#include "Portfactory.h"
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#include "CsyMsgBufBPFrame.h"
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#include "Mux0710Protocol.h"
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#include "CsyDebugLogger.h"
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#include "ChannelMgrCtrl.h"
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#include "ChannelMgrCmdData.h"
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CCommFrameReaderAo* CCommFrameReaderAo::NewL(CPortFactory* aParent, CMux0710Protocol* aMux0710Protocol)
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/**
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* This methods uses two phase construction and the cleanup stack to create
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* an instance of class CCommFrameReaderAo.
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* @param aParent - Pointer to parent
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* @param aMux0710Protocol - Pointer to Mux 27.010 object
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* @return Pointer to the created instance
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*/
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{
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_LOG_L4C1("CCommFrameReaderAo::NewL");
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CCommFrameReaderAo* c = new (ELeave) CCommFrameReaderAo(aParent, aMux0710Protocol);
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CleanupStack::PushL(c);
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c->ConstructL();
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CleanupStack::Pop();
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return c;
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}
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CCommFrameReaderAo::~CCommFrameReaderAo()
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/**
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* Destructor. Cancel any outstanding request.
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*/
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{
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_LOG_L4C1("CCommFrameReaderAo::~CCommFrameReaderAo");
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Cancel();
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}
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CCommFrameReaderAo::CCommFrameReaderAo(CPortFactory* aParent, CMux0710Protocol* aMux0710Protocol)
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/**
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* Constructor. Pass priority of active object to base class.
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* @param aParent - Pointer to parent
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* @param aMux0710Protocol - Pointer to Mux 27.010 object
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*/
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: CCommReadWriteBaseAo(aParent, aMux0710Protocol, KFrameReaderAoPriority),
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iFrameReaderState(ECsyWaitingForStartFlag)
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{
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}
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void CCommFrameReaderAo::ConstructL()
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/**
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* Retrieve a pointer to the LDD comm port.
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*/
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{
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_LOG_L4C1("CCommFrameReaderAo::ConstructL");
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SetBuffersL();
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}
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void CCommFrameReaderAo::DoCancel()
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/**
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* Cancel an outstanding request.
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* @param void
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*/
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{
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_LOG_L4C1("CCommFrameReaderAo::DoCancel");
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iCommPort->ReadCancel();
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}
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void CCommFrameReaderAo::BasicOption()
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/**
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* Basic option frames
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* Note this has not been tested since DSample/P2 do not use basic option
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*/
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{
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TUint octet;
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TBool frameData = EFalse;
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TInt len = iBuf->Length();
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TPtr8 ptr = iBuffer->Des();
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_LOG_L3C2("Received %d bytes",len);
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for (TInt loop = 0; loop < len; loop++)
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{
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octet = ptr[loop];
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if (octet == KCsy0710StartEndFlag)
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{
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// Control bit
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switch(iFrameReaderState)
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{
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case ECsyWaitingForStartFlag:
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{
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_LOG_L3C2("[0x%02x] Got start flag",octet);
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iFrameReaderState = ECsyWaitingForFrameStart;
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if (iFrameBuf == NULL)
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{
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// There is data to process - get a new frame
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iFrameBuf = iMux0710Protocol->GetFreeFrameBuf();
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if (iFrameBuf == NULL)
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{
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_LOG_L1C1("** No free frame buffer ** - ignoring frame");
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break;
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}
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}
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}
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break;
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case ECsyWaitingForFrameStart:
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{
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// disregard additional flag
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}
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break;
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case ECsyWaitingForFrameData:
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{
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iFrameReaderState = ECsyWaitingForStartFlag;
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// must be the end flag
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_LOG_L3C2("[0x%02x] End of frame",octet);
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if (iFrameBuf)
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{
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if(iFrameBuf->iMsg.Length())
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{
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// Frame holds something
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AddToReceivedFramesList(iFrameBuf);
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iFrameBuf = NULL;
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}
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else
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{
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_LOG_L1C1("** zero length frame **");
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// MAF __ASSERT_DEBUG(EFalse, PANIC(KPanicIllegalState));
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}
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}
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else
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{
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_LOG_L3C1("** no frame buffer! **");
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}
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}
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break;
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default:
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// MAF __ASSERT_DEBUG(EFalse, PANIC(KPanicIllegalState));
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_LOG_L1C2("** unexpected flag ** [iFrameReaderState=%d]",iFrameReaderState);
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break;
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}
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}
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else
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{
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if (iFrameReaderState == ECsyWaitingForFrameStart)
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{
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iFrameReaderState = ECsyWaitingForFrameData;
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iFrameBuf->iMsg.Append(octet);
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#ifdef _DEBUG
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// This variable should only be set if it debug
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// Otherwise we get warnings when compiling with ARM v5
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TUint dlcNum = octet >> 2;
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#endif
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_LOG_L3C3E("[0x%02x] dlcNum=%d", octet, dlcNum);
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}
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else
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{
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_LOG_L3C2("[0x%02x]",octet);
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frameData = ETrue;
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}
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}
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if (frameData)
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{
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// MAF __ASSERT_DEBUG((iFrameReaderState == ECsyWaitingForFrameData),PANIC(KPanicIllegalState));
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TUint frameLen = (TUint) (iFrameBuf->iMsg.Length() + 1);
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if (frameLen > KMaxAdvFrameSize)
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{
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_LOG_L1C3("** length %d will exceed max length %d **",
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frameLen,KMaxFrameSize);
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iFrameBuf->iMsg.Zero();
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iFrameReaderState = ECsyWaitingForStartFlag;
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break;
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}
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frameData = EFalse;
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iFrameBuf->iMsg.Append(octet);
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}
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}
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}
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void CCommFrameReaderAo::AdvancedOption()
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/**
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* Advanced option frames
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*/
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{
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TUint octet = 0;
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TBool frameData = EFalse;
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TInt len = iBuf->Length();
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TPtr8 ptr = iBuffer->Des();
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_LOG_L3C2("Received %d bytes",len);
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TInt startVal = 0;
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// Check processing (helps when we have lost sync with data due to read error)
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if ((iFrameReaderState == ECsyWaitingForStartFlag)&&(len))
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{
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// We are on the hunt for the start flag
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if (iESCRecved)
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{
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_LOG_L2C1("Escape flag set - ignore first octet");
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iESCRecved = EFalse;
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}
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else
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octet = ptr[0];
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if (octet != KCsy0710StartEndFlag)
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{
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_LOG_L3C2("[0x%02x]",octet);
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_LOG_L2C1("* Looking for the start flag *");
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do
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{
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startVal++;
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if (startVal == len)
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break;
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octet = ptr[startVal];
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if (iESCRecved)
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{
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iESCRecved = EFalse;
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continue;
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}
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if (octet == KCsy0710EscapeByte)
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iESCRecved = ETrue;
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}
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while (octet != KCsy0710StartEndFlag);
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_LOG_L2C2("Disregarded %d bytes",startVal);
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}
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}
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// Do processing of the received buffer
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for (TInt loop = startVal; loop < len; loop++)
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{
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octet = ptr[loop];
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if (iESCRecved)
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{
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_LOG_L3C2("[0x%02x] - Recv ESC before, change this char",octet);
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octet = (TUint8) (octet^(1<<5));
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_LOG_L3C2("Changed to [0x%02x]",octet);
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iESCRecved = EFalse;
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frameData = ETrue;
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}
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else
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{
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if (octet == KCsy0710EscapeByte)
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{
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_LOG_L3C1("KCsy0710EscapeByte");
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iESCRecved = ETrue;
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}
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else if (octet == KCsy0710StartEndFlag)
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{
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// Control bit
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switch(iFrameReaderState)
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{
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case ECsyWaitingForFrameData:
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{
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iFrameReaderState = ECsyWaitingForStartFlag;
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if (iFrameBuf)
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{
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TInt frameLen = iFrameBuf->iMsg.Length();
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if(frameLen > KAdvOptionHeaderSize)
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{
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TUint8 checkSum = iFrameBuf->iMsg[frameLen-1];
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if (CheckFCS(iFrameBuf->iMsg,KAdvOptionHeaderSize,checkSum))
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{
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// must be the end flag
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_LOG_L3C2("[0x%02x] End of frame",octet);
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// Frame holds something
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AddToReceivedFramesList(iFrameBuf);
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iFrameBuf = NULL;
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}
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else
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{
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_LOG_L1C1("** checksum is incorrect - rejecting frame **");
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iFrameBuf->iMsg.Zero();
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}
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}
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else
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{
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_LOG_L1C2("** Rejected incorrect length frame %d **",frameLen);
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iFrameBuf->iMsg.Zero();
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}
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}
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else
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{
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_LOG_L3C1("** no frame buffer! **");
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}
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TInt check = loop+1;
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if (check == len)
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break;
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// There are more bytes in this buffer to process
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octet = ptr[check];
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if (octet != KCsy0710StartEndFlag)
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{
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// Frames are back to back
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_LOG_L2C1("* No start flag - assuming frames back to back *");
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octet = KCsy0710StartEndFlag;
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}
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}
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// deliberate fall through
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case ECsyWaitingForStartFlag:
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{
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_LOG_L3C2("[0x%02x] Got start flag",octet);
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iFrameReaderState = ECsyWaitingForFrameStart;
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if (iFrameBuf == NULL)
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{
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// There is data to process - get a new frame
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iFrameBuf = iMux0710Protocol->GetFreeFrameBuf();
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if (iFrameBuf == NULL)
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{
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_LOG_L1C1("** No free frame buffer ** - ignoring frame");
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// Note: GetFreeFrameBuf handles the flow control
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break;
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}
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}
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}
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break;
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case ECsyWaitingForFrameStart:
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{
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// disregard additional flag
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}
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break;
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default:
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_LOG_L1C2("** unexpected flag ** [iFrameReaderState=%d]",iFrameReaderState);
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// MAF __ASSERT_DEBUG(EFalse, PANIC(KPanicIllegalState));
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break;
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}
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}
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else
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{
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if (iFrameReaderState == ECsyWaitingForFrameStart)
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iFrameReaderState = ECsyWaitingForFrameData;
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_LOG_L3C2("[0x%02x]",octet);
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frameData = ETrue;
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}
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}
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if (frameData)
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{
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frameData = EFalse;
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// MAF __ASSERT_DEBUG((iFrameReaderState == ECsyWaitingForFrameData),PANIC(KPanicIllegalState));
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if (iFrameBuf)
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{
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TUint frameLen = (TUint) (iFrameBuf->iMsg.Length() + 1);
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if (frameLen > KMaxAdvFrameSize)
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{
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_LOG_L1C2("** length will exceed max length %d **",
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KMaxFrameSize);
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iFrameBuf->iMsg.Zero();
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iFrameReaderState = ECsyWaitingForStartFlag;
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break;
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}
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iFrameBuf->iMsg.Append(octet);
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}
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else
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{
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// it should not be possible to enter this condition
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_LOG_L1C2("** No frame buffer allocated for frame ** [iFrameReaderState=%d]",iFrameReaderState);
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// MAF __ASSERT_DEBUG(EFalse,PANIC(KPanicIllegalState));
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}
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}
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}
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}
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void CCommFrameReaderAo::NonMuxed()
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{
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if (iMux0710Protocol->ParseATResponse(*iBuf) == KErrNone)
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{
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iFrameReaderState = ECsyWaitingForStartFlag;
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_LOG_L3C1("ParseATResponse returned KErrNone");
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}
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}
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void CCommFrameReaderAo::RunL()
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/**
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* This method is invoked by the active scheduler when the read request
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426 |
* to the LDD has completed.
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*/
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{
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if (iStatus.Int())
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{
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_LOG_L3C1(" "); // please leave separator in
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_LOG_L1C2("** CCommFrameReaderAo::RunL [iStatus %d] **",iStatus.Int());
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|
434 |
// assumption here, whatever the error we will be able to repost
|
|
435 |
// another request to readoneormore from the serial device driver.
|
|
436 |
|
|
437 |
if (iFrameBuf)
|
|
438 |
{
|
|
439 |
iMux0710Protocol->AddFrameFreeQ(iFrameBuf);
|
|
440 |
iFrameBuf = NULL;
|
|
441 |
}
|
|
442 |
|
|
443 |
//reset state
|
|
444 |
iESCRecved = EFalse;
|
|
445 |
iFrameReaderState = ECsyWaitingForStartFlag;
|
|
446 |
|
|
447 |
iStatus = KRequestPending;
|
|
448 |
SetActive();
|
|
449 |
iCommPort->ReadOneOrMore(iStatus, *iBuf);
|
|
450 |
return;
|
|
451 |
}
|
|
452 |
|
|
453 |
if (iFrameBuf == NULL)
|
|
454 |
{
|
|
455 |
// Only show this log if start of a new frame
|
|
456 |
_LOG_L3C1(" "); // please leave separator in
|
|
457 |
_LOG_L3C1("CCommFrameReaderAo::RunL - start of read");
|
|
458 |
}
|
|
459 |
|
|
460 |
if (!iMux0710Protocol->IsMuxModeEnabled())
|
|
461 |
{
|
|
462 |
NonMuxed();
|
|
463 |
}
|
|
464 |
else
|
|
465 |
{
|
|
466 |
// mux mode is enabled
|
|
467 |
// process recv data according to our current state
|
|
468 |
|
|
469 |
#ifndef _27010ADVANCEOPTION
|
|
470 |
|
|
471 |
BasicOption();
|
|
472 |
|
|
473 |
#else
|
|
474 |
AdvancedOption();
|
|
475 |
|
|
476 |
#endif
|
|
477 |
}
|
|
478 |
|
|
479 |
if (!IsActive())
|
|
480 |
{
|
|
481 |
iStatus = KRequestPending;
|
|
482 |
SetActive();
|
|
483 |
iCommPort->ReadOneOrMore(iStatus, *iBuf);
|
|
484 |
}
|
|
485 |
}
|
|
486 |
|
|
487 |
void CCommFrameReaderAo::Read()
|
|
488 |
/**
|
|
489 |
* This method is called to start the process to read an ascii string
|
|
490 |
* (e.g. response to initial AT+CMUX=0,0,5 command) or a frame from
|
|
491 |
* the serial port LDD.
|
|
492 |
* Note that this method will only be called once and then the RunL
|
|
493 |
* will handle the reading of the comm port.
|
|
494 |
*/
|
|
495 |
{
|
|
496 |
_LOG_L4C1(">>CCommFrameReaderAo::Read");
|
|
497 |
|
|
498 |
if (!IsActive())
|
|
499 |
{
|
|
500 |
_LOG_L3C1("Read not active");
|
|
501 |
|
|
502 |
// Set the object active
|
|
503 |
iStatus = KRequestPending;
|
|
504 |
SetActive();
|
|
505 |
iCommPort->ReadOneOrMore(iStatus, *iBuf);
|
|
506 |
}
|
|
507 |
else
|
|
508 |
{
|
|
509 |
_LOG_L2C1("** Already active **");
|
|
510 |
}
|
|
511 |
|
|
512 |
_LOG_L4C1("<<CCommFrameReaderAo::Read");
|
|
513 |
}
|
|
514 |
|
|
515 |
void CCommFrameReaderAo::ReadCancel()
|
|
516 |
/**
|
|
517 |
* Cancel a read request.
|
|
518 |
*/
|
|
519 |
{
|
|
520 |
_LOG_L4C1(">>CCommFrameReaderAo::ReadCancel");
|
|
521 |
|
|
522 |
iCommPort->ReadCancel();
|
|
523 |
if (iFrameBuf)
|
|
524 |
{
|
|
525 |
// return buffer to free frame queue
|
|
526 |
iMux0710Protocol->AddFrameFreeQ(iFrameBuf);
|
|
527 |
iFrameBuf = NULL;
|
|
528 |
}
|
|
529 |
|
|
530 |
_LOG_L4C1("<<CCommFrameReaderAo::ReadCancel");
|
|
531 |
}
|
|
532 |
|
|
533 |
TBool CCommFrameReaderAo::CheckFCS(TDes8& aBuffer, TInt aLen, TUint8 aSuppliedChecksum)
|
|
534 |
/**
|
|
535 |
* This method checks the checksum for the specified buffer with the
|
|
536 |
* specified length.
|
|
537 |
*
|
|
538 |
* @param aBuffer - Data
|
|
539 |
* @param aLen - Number of bytes in the Buffer for which CheckSum to be calculated
|
|
540 |
* @return ETrue if checksum is okay
|
|
541 |
*/
|
|
542 |
{
|
|
543 |
TUint8 frameCheckSum = 0xFF;
|
|
544 |
|
|
545 |
for (TInt i=0; i < aLen; i++)
|
|
546 |
{
|
|
547 |
frameCheckSum = crctable[(frameCheckSum ^ aBuffer[i])];
|
|
548 |
}
|
|
549 |
|
|
550 |
// One's Complement
|
|
551 |
frameCheckSum = crctable[(frameCheckSum ^ aSuppliedChecksum)];
|
|
552 |
|
|
553 |
if (frameCheckSum == 0xCF)
|
|
554 |
return ETrue;
|
|
555 |
|
|
556 |
return EFalse;
|
|
557 |
}
|
|
558 |
|
|
559 |
void CCommFrameReaderAo::AddToReceivedFramesList(CCsyMsgBufBpFrame* aBpFrame)
|
|
560 |
/**
|
|
561 |
* This method is called by the comm frame reader to add the specified
|
|
562 |
* received frame to a c32 port interface queue. The specific C32 port
|
|
563 |
* interface object is determined from the DLC number embedded in the frame.
|
|
564 |
*
|
|
565 |
* @param aBpFrame - Pointer to the received frame
|
|
566 |
*/
|
|
567 |
{
|
|
568 |
_LOG_L4C1(">>CCommFrameReaderAo::AddToReceivedFramesList");
|
|
569 |
|
|
570 |
TUint8 dlcNum = aBpFrame->GetDlcNum();
|
|
571 |
|
|
572 |
_LOG_L4C2("dlcNum=%d", dlcNum);
|
|
573 |
_LOG_L4C2("frameType=0x%x", aBpFrame->GetFrameType());
|
|
574 |
|
|
575 |
// check for a message for the control channel
|
|
576 |
if (dlcNum == 0)
|
|
577 |
{
|
|
578 |
iParent->GetControlChannel()->ProcessRecvFrame(aBpFrame);
|
|
579 |
}
|
|
580 |
else
|
|
581 |
{
|
|
582 |
CChannelMgrCmdData* channel = iParent->FindChannelMgrByDlcNum(dlcNum);
|
|
583 |
if (channel != NULL)
|
|
584 |
channel->ProcessRecvFrame(aBpFrame);
|
|
585 |
else
|
|
586 |
{
|
|
587 |
_LOG_L1C2("** No port defined for dlcNum=%d **", dlcNum);
|
|
588 |
iMux0710Protocol->AddFrameFreeQ(aBpFrame);
|
|
589 |
}
|
|
590 |
}
|
|
591 |
|
|
592 |
_LOG_L4C1("<<CCommFrameReaderAo::AddToReceivedFramesList");
|
|
593 |
}
|
|
594 |
|