Drivers Option Card Reader

Posted By admin On 13/10/21

A card reader is a device, typically having a USB interface, for accessing the data on a memory card such as a CompactFlash, secure digital or Multimedia Card. Most card readers also offer write capability, together with the card, can function as a pen drive.

Drivers Option Card Reader
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Overview of the Smartcard device drivers technology.

Drivers Option Card readerCard

To develop Smartcard device drivers, you need these headers:

For the programming guide, see Smartcard device drivers.


IOCTL_SMARTCARD_EJECTThe IOCTL_SMARTCARD_EJECT request ejects the currently inserted smart card from the smart card reader.
IOCTL_SMARTCARD_GET_LAST_ERRORThe IOCTL_SMARTCARD_GET_LAST_ERROR request retrieves the error code of the most previous operation because there is no option to return an error code immediately after an overlapped operation is complete.
IOCTL_SMARTCARD_SWALLOWThe IOCTL_SMARTCARD_SWALLOW request causes the smart card reader to swallow the card.


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SMARTCARD_EXTENSIONThe SMARTCARD_EXTENSION structure is used by both the smart card reader driver and the smart card driver library to access all other smart card data structures.
CLOCK_RATE_CONVERSIONThe CLOCK_RATE_CONVERSION structure holds a value that determines the duration of a bit of data and the corresponding maximum operating frequency that accompanies the indicated bit length.
OS_DEP_DATAThe OS_DEP_DATA structure defines the data that is stored in the OsData member of the SMARTCARD_EXTENSION structure, which holds smart card information that is specific to the operating system.
PTS_DATAThe PTS_DATA structure is used for protocol type selection (PTS).
SCARD_CARD_CAPABILITIESThe SCARD_CARD_CAPABILITIES structure declaration defines the data that is stored in the CardCapabilites member of the SMARTCARD_EXTENSION structure and holds all information that is specific to the particular smart card that is currently used.
SCARD_READER_CAPABILITIESThe SCARD_READER_CAPABILITIES structure holds state information about the smart card reader.
SMARTCARD_REPLYDescribes the reply buffer received from the smart card.
SMARTCARD_REQUESTDescribes the request buffer that contains data to send to the card.
T0_DATAThe T0_DATA structure is used by the smart card driver library to process T0 I/O.
T1_DATAThe T1_DATA structure is used by the smart card driver library to process T1 I/O.
VENDOR_ATTRThe VENDOR_ATTR structure defines the data that is stored in the VendorAttr member of the SMARTCARD_EXTENSION structure. VENDOR_ATTR also holds information that identifies the smart card reader, such as the vendor name, unit number, and serial number.

This section provides installation information that is specific to smart card reader drivers for Microsoft Windows.

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Vendors that supply their own reader drivers should make each driver a member of the SmartCardReader setup class in the INF Version Section of the driver's INF file. Vendors must also add a section to properly configure the smartcard services. For example:

Vendors that supply their own UMDF reader driver need a registry setting to allow PnP filter drivers to sit on top of the UMDF reflector. Specifically, in the driver INF file, this entry is needed:

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There are no other special requirements that are associated with installing smart card reader drivers.

Drivers Option Card Reader

For general information about device installation in Windows, see Device Installation Overview.