PI8042_SYNCH_READ_PORT - NtDoc
Native API online documentation, based on the System Informer
(formerly Process Hacker) phnt
headers
// ntdd8042.h
PI8042_SYNCH_READ_PORT Pi8042SynchReadPort;
NTSTATUS Pi8042SynchReadPort(
[in] PVOID Context,
[out] PUCHAR Value,
[in] BOOLEAN WaitForACK
)
{...}
View the official Windows Driver Kit DDI referenceNo description available.
The PI8042_SYNCH_READ_PORT-typed callback routine does a synchronized read from an i8042 port. I8042prt supplies this callback.
Context [in]Pointer to a context supplied by I8042prt.
Value [out]Pointer to the UCHAR value returned by the routine.
WaitForACK [in]Not used.
The PI8042_SYNCH_READ_PORT callback returns one of the following status values:
| Return code | Description |
|---|---|
| STATUS_SUCCESS | The routine successfully returned a byte. |
| STATUS_IO_TIMEOUT | The hardware was not ready for a read access. |
The PI8042_SYNCH_READ_PORT callback can only be used in a PI8042_KEYBOARD_INITIALIZATION_ROUTINE callback. I8042prt specifies the read port callback in the ReadPort parameter that I8042prt inputs to a keyboard initialization routine.
The routine polls the hardware until a read is returned by the hardware or an internal time-out occurs.
PI8042_KEYBOARD_INITIALIZATION_ROUTINE