Categories: Symbian C++ | Code Examples | How To | Hardware

This page was last modified 13:32, 31 December 2007.

From Forum Nokia Wiki

class TCidDecoder
{
	public:
		#define LO_NIBBLE(val) (val & 0x0F)
		#define HI_NIBBLE(val) ((val >> 4) & 0x0F)
		#define IS_ASCII(val) (val >= 0x20 && val < 0x7F)
 
	public:
		TCidDecoder(TDesC8& aBuf, TBool aSDCard) 
		{
			iBuf.Copy(aBuf); 
			iSDCard = aSDCard;
		};
 
		// constructor which tries to deduce whether card is an MMC or SD card
		TCidDecoder(TDesC8& aBuf) 
		{
			iBuf.Copy(aBuf); 
			iSDCard = ETrue;
			if (HI_NIBBLE(iBuf[2]) != 0) 
				iSDCard = EFalse;
			TInt sdMonth = LO_NIBBLE(iBuf[1]);
			if (sdMonth == 0 || sdMonth > 12)
				iSDCard = EFalse;
 
			// get this year so we can check for daft years
			TTime now;
			now.HomeTime();
			TDateTime dateTime = now.DateTime();
			TInt year = dateTime.Year();
 
			TInt sdYear = HI_NIBBLE(iBuf[1]) + (LO_NIBBLE(iBuf[2]) << 4) + 2000;
			if (sdYear > year) // stupid year ?
				iSDCard = EFalse;
 
		// // Oid should be ascii for SD and binary for MMC - but this isn't always true
		// if (!IS_ASCII(iBuf[13]) || !IS_ASCII(iBuf[14]))
		// iSDCard = EFalse;
		};
 
		void ManufacturingDate(TInt& aYear, TInt& aMonth) 
		{
			if (iSDCard)
			{
				aYear = HI_NIBBLE(iBuf[1]) + (LO_NIBBLE(iBuf[2]) << 4) + 2000; 
				aMonth = LO_NIBBLE(iBuf[1]);
			}
			else
			{
				aYear = LO_NIBBLE(iBuf[1]) + 1997; 
				aMonth = HI_NIBBLE(iBuf[1]);
			}
		}
 
		TUint32 SerialNumber() 
		{
			if (iSDCard)
				return( (iBuf[6]<<24) | (iBuf[5]<<16) | (iBuf[4]<<8) | (iBuf[3]) );
			else
				return( (iBuf[5]<<24) | (iBuf[4]<<16) | (iBuf[3]<<8) | (iBuf[2]) );
		}
 
		void ProductRevision(TInt& aMajor, TInt& aMinor) 
		{
			if (iSDCard)
			{
				aMajor = (iBuf[7] & 0xF0) >> 4; 
				aMinor = iBuf[7] & 0x0F;
			}
			else
			{
				aMajor = (iBuf[6] & 0xF0) >> 4; 
				aMinor = iBuf[6] & 0x0F;
			}
		}
 
		void ProductName(TBuf<6>& aName) 
		{
			aName.SetLength(5); 
			aName[0] = iBuf[12]; 
			aName[1] = iBuf[11]; 
			aName[2] = iBuf[10]; 
			aName[3] = iBuf[9]; 
			aName[4] = iBuf[8];
			if (!iSDCard)
				aName.Append(iBuf[7]);
		};
 
		void Oid(TBuf<2>& aOid) 
		{
			aOid.SetLength(2); 
			aOid[0] = iBuf[14]; 
			aOid[1] = iBuf[13];
		};
 
		TUint8 ManufactureID() 
		{
			return iBuf[15];
		}
		TBool IsSdCard() 
		{ 
			return iSDCard;
		};
 
 
	public:
		TBuf8<16> iBuf;
		TBool iSDCard; // MMC card if false, SD card otherwise
};