// Copyright (c) 1998-2009 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:

 // bootldr\inc\ymodem.h

 // 

 //

 #ifndef __YMODEM_H__

 #define __YMODEM_H__

 #ifndef __KERNEL_MODE__

 #include <e32base.h>

 typedef CBase BASE;

 //#else

 //#include <kernel/kernel.h>

 //typedef DBase BASE;

 #endif

 const TUint8 SOH=0x01;

 const TUint8 STX=0x02;

 const TUint8 EOT=0x04;

 const TUint8 ACK=0x06;

 const TUint8 NAK=0x15;

 const TUint8 CAN=0x18;

 const TUint8 SUB=0x1A;

 const TUint8 BIGC=0x43;

 const TUint8 BIGG=0x47;

 const TInt KErrZeroLengthPacket=-200;

 const TInt KErrPacketTooShort=-201;

 const TInt KErrBadPacketType=-202;

 const TInt KErrCorruptSequenceNumber=-203;

 const TInt KErrWrongSequenceNumber=-204;

 const TInt KErrBadCrc=-205;

 const TInt KErrBadTerminationPacket=-206;

 const TInt KHeaderBufferSize=1024; 

 class YModem : public BASE

 	{

 public:

 	TInt StartDownload(TBool aG, TInt& aLength, TDes& aName);

 	TInt ReadPackets(TUint8*& aDest, TInt aLength);

 	// Support to deflated ROM Image

 	TInt GetInnerCompression(TBool &aImageDeflated, TBool &aRomLoaderHeaderExists);

 	TInt GetHeaderBufferContent(TUint8*& aDest, TInt& aLength);

 	TBool IsHeaderStored(void);

 protected:

 	YModem(TBool aG);

 	void UpdateCrc(const TUint8* aPtr, TInt aLength);

 	TInt CheckPacket(TUint8* aDest);

 	TInt ReadPacket(TDes8& aDest);

 	virtual TInt ReadBlock(TDes8& aDest)=0;

 	virtual void WriteC(TUint aChar)=0;

 protected:

 	TInt iTimeout;

 	TInt iState;

 	TInt iPacketSize;

 	TInt iBlockSize;

 	TUint8 iInitChar;

 	TUint8 iSeqNum;

 	TUint16 iCrc;

 	TInt iFileSize;

 	TBuf8<1040> iPacketBuf;

 	TBuf<256> iFileName;

     // Support to deflated ROM Image

 	TBuf8<KHeaderBufferSize> iHeaderBuf;

     TBool iHeaderStored;

     TInt iDataSizeInPuffer;

     TBool iImageDeflated;

 	};

 #endif