when i install my smart card driver i get this error[The reader cannot communicate with the smart ca

Hi ,

I have written a smart card reader driver{contactless smart card
reader}, When i install the driver and open a reader application , i
get a error as

The reader cannot communicate with the smart card, due to ATR
configuration conflicts.

Can some body tell me why this occurs ,

my power call back function looks as below,


NTSTATUS phNfc4Win_ScardPower(PSMARTCARD_EXTENSION SmartcardExtension)
{
NTSTATUS status = STATUS_SUCCESS;
KIRQL irql;
static BYTE AtrBuffer[PH_MAX_ATR_BUFFER_SIZE];
BYTE Atrlength =0;
PDEVICE_CONTEXT pDevContext;
BYTE i = 0;

BYTE index =0;
BYTE crcdata = 0;

pDevContext =
GetDeviceContext(WdfWdmDeviceGetWdfDeviceHandle(SmartcardExtension-

KdPrint(("%sVdPowerReader\n"));

if ((status = SmartcardAcquireRemoveLock(SmartcardExtension)) !=
STATUS_SUCCESS)
{
SmartcardExtension->IoRequest.Information = 0;
}
else
{
switch (SmartcardExtension->MinorIoControlCode)
{
case SCARD_POWER_DOWN :
{
KdPrint(("\t%sSCARD_POWER_DOWN\n"));
SmartcardExtension->CardCapabilities.ATR.Length = 0;
*(SmartcardExtension->IoRequest.Information) = 0;
status = STATUS_SUCCESS;
break;
}
case SCARD_COLD_RESET :
{
/* change this data based on were we store the ATR */

//status = phNfc4Win_GetAtrInformation(&pDevContext-

buffer[0] = 0x3B;
buffer[1] = (0x80 + pDevContext-

buffer[2] = 0x80;
buffer[3] = 0x01;
memcpy((buffer +4),pDevContext-

for (index= 1; index<(4 + pDevContext-

{
crcdata = crcdata ^ buffer[index];
}
buffer[pDevContext-

crcdata;

Atrlength = (5 + pDevContext-

SmartcardExtension->ReaderCapabilities.CurrentState =
SCARD_SPECIFIC;

SmartcardExtension->CardCapabilities.ATR.Length =
(UCHAR)Atrlength;
*(SmartcardExtension->IoRequest.Information) =
(UCHAR)Atrlength;
for(i = 1; i<= 48; i++ )
{
KdPrint(("buffer 0x%x \n",buffer));
}
RtlCopyMemory(SmartcardExtension->IoRequest.ReplyBuffer, buffer,
Atrlength);
RtlCopyMemory(SmartcardExtension->CardCapabilities.ATR.Buffer,
buffer, Atrlength);
//RtlCopyMemory(SmartcardExtension->IoRequest.ReplyBuffer, buffer,
Atrlength);

/*KeAcquireSpinLock(&SmartcardExtension->OsData->SpinLock,
&irql);
SmartcardExtension->ReaderCapabilities.CurrentState =
SCARD_SPECIFIC;

KeReleaseSpinLock(&SmartcardExtension->OsData->SpinLock,
irql);*/
status = STATUS_SUCCESS;
break;
}
case SCARD_WARM_RESET :
/* change this data based on were we store the ATR */
{
KdPrint(("\t%sSCARD_COLD_RESET\n"));

KeAcquireSpinLock(&SmartcardExtension->OsData->SpinLock,&irql);
//if ( SmartcardExtension->ReaderCapabilities.CurrentState

//status = phNfc4Win_GetAtrInformation(&pDevContext-

buffer[0] = 0x3B;
buffer[1] = (0x80 + pDevContext-

buffer[2] = 0x80;
buffer[3] = 0x01;
memcpy(&(buffer[4]),pDevContext-

for (index= 1; index<(4 + pDevContext-

{
crcdata = crcdata ^ buffer[index];
}
buffer[pDevContext-

crcdata;

Atrlength = (5 + pDevContext-

SmartcardExtension->CardCapabilities.ATR.Length =
(UCHAR)Atrlength;
*(SmartcardExtension->IoRequest.Information) =
(UCHAR)Atrlength;
for(i = 1; i<= 48; i++ )
{
KdPrint(("buffer 0x%x \n",buffer));
}
SmartcardExtension->ReaderCapabilities.CurrentState =
SCARD_SPECIFIC;
RtlCopyMemory(SmartcardExtension->IoRequest.ReplyBuffer, buffer,
Atrlength);
RtlCopyMemory(SmartcardExtension->CardCapabilities.ATR.Buffer,
buffer, Atrlength);
//RtlCopyMemory(SmartcardExtension->IoRequest.ReplyBuffer,
buffer, Atrlength);

status = STATUS_SUCCESS;
}
/*else
{
KeReleaseSpinLock(&SmartcardExtension->OsData->SpinLock,irql);
}*/
status = STATUS_SUCCESS;
break;
}
default :
status = STATUS_SUCCESS;
break;
}
SmartcardReleaseRemoveLock(SmartcardExtension);
}
return (STATUS_SUCCESS);
}

thanks ,
Jagadish