KbFilter_IsrHook routine
The KbFilter_IsrHook routine is a template for a PI8042_KEYBOARD_ISR callback routine that customizes the operation of the I8042prt keyboard ISR.
Syntax
KbFilter_IsrHook KbFilter_IsrHook(
_In_ PDEVICE_OBJECT DeviceObject,
_In_ PKEYBOARD_INPUT_DATA CurrentInput,
_In_ POUTPUT_PACKET CurrentOutput,
_Inout_ UCHAR StatusByte,
_In_ PUCHAR DataByte,
_Out_ PBOOLEAN ContinueProcessing,
_In_ PKEYBOARD_SCAN_STATE ScanState
);
Parameters
DeviceObject [in]
Pointer to the filter device object of the driver that supplies this callback.CurrentInput [in]
Pointer to the input KEYBOARD_INPUT_DATA structure that is being constructed by the ISR.CurrentOutput [in]
Pointer to an OUTPUT_PACKET structure that specifies the bytes that are being written to the hardware device.StatusByte [in, out]
Specifies the status byte that is read from I/O port 60 when an interrupt occurs.DataByte [in]
Specifies the data byte that is read from I/O port 64 when an interrupt occurs.ContinueProcessing [out]
Specifies, if TRUE, to continue processing in the I8042prt keyboard ISR after this callback returns; otherwise, processing is not continued.ScanState [in]
Pointer to a KEYBOARD_SCAN_STATE structure that specifies the keyboard scan state.
Return value
KbFilter_IsrHook returns TRUE if the interrupt service routine should continue; otherwise it returns FALSE.
Remarks
This callback is not needed if the default operation of I8042prt is sufficient.
The I8042prt keyboard ISR calls KbFilter_IsrHook after it validates the interrupt and reads the scan code.
KbFilter_IsrHook runs in kernel mode at the IRQL of the I8042prt keyboard ISR.
Requirements
Target platform |
|
Header |
Ntdd8042.h (include Ntdd8042.h) |
IRQL |
See Remarks section. |
See also