// sddef.h
typedef enum {
SDTD_UNSPECIFIED,
SDTD_READ,
SDTD_WRITE
} SD_TRANSFER_DIRECTION;
View the official Windows Driver Kit DDI referenceNo description available.
A SD_TRANSFER_DIRECTION value indicates the data transfer direction of a Secure Digital (SD) card command.
SDTD_UNSPECIFIEDThe data transfer direction is unspecified.
SDTD_READThe data transfer is from the SD device to the host.
SDTD_WRITEThe data transfer is from the SD host to the device.