VideoPortReadPortBufferUchar - NtDoc
Native API online documentation, based on the System Informer
(formerly Process Hacker) phnt
headers
// video.h
VIDEOPORT_DEPRECATED VIDEOPORT_API VOID VideoPortReadPortBufferUchar(
PUCHAR Port,
[out] PUCHAR Buffer,
ULONG Count
);
View the official Windows Driver Kit DDI referenceNo description available.
The VideoPortReadPortBufferUchar function reads a number of bytes from a mapped I/O port and writes them into a buffer.
PortPointer to the I/O port. The given Port must be in a mapped I/O-space range returned by VideoPortGetDeviceBase.
Buffer [out]Pointer to a buffer into which the UCHAR values are written.
CountSpecifies the number of bytes to be written to the buffer.
None
The buffer must be large enough to contain at least the specified number of bytes.
A miniport driver's HwVidInterrupt or HwVidSynchronizeExecutionCallback function can call VideoPortReadPortBufferUchar.
Callers of VideoPortReadPortBufferUchar can be running at any IRQL, provided that the memory pointed to by the Buffer parameter is resident and that pointed to by the Port parameter is resident, mapped device memory.
HwVidSynchronizeExecutionCallback