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// Copyright (c) 1998-2009 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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// bootldr\inc\ymodem.h
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//
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//
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#ifndef __YMODEM_H__
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#define __YMODEM_H__
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#ifndef __KERNEL_MODE__
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#include <e32base.h>
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typedef CBase BASE;
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//#else
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//#include <kernel/kernel.h>
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//typedef DBase BASE;
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#endif
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const TUint8 SOH=0x01;
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const TUint8 STX=0x02;
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const TUint8 EOT=0x04;
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const TUint8 ACK=0x06;
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const TUint8 NAK=0x15;
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const TUint8 CAN=0x18;
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const TUint8 SUB=0x1A;
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const TUint8 BIGC=0x43;
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const TUint8 BIGG=0x47;
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const TInt KErrZeroLengthPacket=-200;
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const TInt KErrPacketTooShort=-201;
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const TInt KErrBadPacketType=-202;
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const TInt KErrCorruptSequenceNumber=-203;
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const TInt KErrWrongSequenceNumber=-204;
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const TInt KErrBadCrc=-205;
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const TInt KErrBadTerminationPacket=-206;
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const TInt KHeaderBufferSize=1024;
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class YModem : public BASE
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{
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public:
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TInt StartDownload(TBool aG, TInt& aLength, TDes& aName);
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TInt ReadPackets(TUint8*& aDest, TInt aLength);
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// Support to deflated ROM Image
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TInt GetInnerCompression(TBool &aImageDeflated, TBool &aRomLoaderHeaderExists);
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TInt GetHeaderBufferContent(TUint8*& aDest, TInt& aLength);
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TBool IsHeaderStored(void);
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protected:
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YModem(TBool aG);
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void UpdateCrc(const TUint8* aPtr, TInt aLength);
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TInt CheckPacket(TUint8* aDest);
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TInt ReadPacket(TDes8& aDest);
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virtual TInt ReadBlock(TDes8& aDest)=0;
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virtual void WriteC(TUint aChar)=0;
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protected:
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TInt iTimeout;
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TInt iState;
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TInt iPacketSize;
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TInt iBlockSize;
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TUint8 iInitChar;
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TUint8 iSeqNum;
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TUint16 iCrc;
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TInt iFileSize;
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TBuf8<1040> iPacketBuf;
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TBuf<256> iFileName;
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// Support to deflated ROM Image
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TBuf8<KHeaderBufferSize> iHeaderBuf;
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TBool iHeaderStored;
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TInt iDataSizeInPuffer;
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TBool iImageDeflated;
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};
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#endif
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