NdisReadRegisterUchar

NdisReadRegisterUchar is called by the NIC driver to read a UCHAR from a memory-mapped device register.

VOID
  NdisReadRegisterUchar(
    IN PUCHAR  Register,
    OUT PUCHAR  Data
    );

Parameters

Register

Pointer to the memory-mapped register. This virtual address must fall within a range returned by an initialization-time call to NdisMMapIoSpace.

Data

Pointer to the caller-supplied variable in which this function returns the UCHAR read from Register.

Headers

Declared in Ndis.h. Include Ndis.h.

Comments

If a driver calls this function, its NIC’s device registers must be mapped to noncached memory during driver initialization.

Callers of NdisReadRegisterUchar can be running at any IRQL.

See Also

MiniportInitialize, NdisMMapIoSpace, NdisReadRegisterUlong, NdisReadRegisterUshort, NdisWriteRegisterUchar