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This structure describes the characteristics of serial hardware devices.
typedef struct __HWOBJ {
PVOID
pDeviceParent;
ULONG
BindFlags;
DWORD
dwIntID;
PVOID
pReserved;
PHW_VTBL
pFuncTbl;
} HWOBJ, *PHWOBJ;
Members
- pDeviceParent
- Pointer back to the DEVICE_LISTstructure which refers to this structure in its DeviceArraymember.
- BindFlags
- Flags controlling how the MDD layer behaves with respect to the
driver's interrupt service thread (IST):
Value Description THREAD_IN_PDD The MDD layer does nothing; interrupt handling is done in the PDD layer. THREAD_AT_INIT The MDD starts the IST when the driver is initialized. THREAD_AT_OPEN Not supported. - dwIntID
- Interrupt identifier — such as SYSINTR_SERIAL, SYSINTR_TOUCH, and so on — used with the THREAD_AT_INIT and THREAD_AT_OPEN flags,.
- pReserved
- Not used; set to NULL.
- pFuncTbl
- Pointer to an
HW_VTBLstructure that contains a table of function pointers
for each of the serial device hardware functions, such as
HWOpen,
HWClearBreak,
HWSetDTR, and so on.
HW_VTBLand the full list of functions are declared in the
Serhw.h header file.
Remarks
This structure enables one serial driver MDD layer to use multiple PDD layers for hardware serial ports that have different physical behavior but identical logical behavior, such as an infrared serial port and a standard 9-pin serial port.
This structure is declared in the Serhw.h header file.
Requirements
Runs on Versions Defined in Include Link to Windows CE OS 1.0 and later Note This API is part of the complete Windows CE OS package as provided by Microsoft. The functionality of a particular platform is determined by the original equipment manufacturer (OEM) and some devices may not support this API.
See Also
Last updated on Tuesday, July 13, 2004