PARALLEL_PNP_INFORMATION structure (parallel.h)

The PARALLEL_PNP_INFORMATION structure specifies information about the capabilities of a parallel port.

Syntax

typedef struct _PARALLEL_PNP_INFORMATION {
  PHYSICAL_ADDRESS             OriginalEcpController;
  PUCHAR                       EcpController;
  ULONG                        SpanOfEcpController;
  ULONG                        PortNumber;
  ULONG                        HardwareCapabilities;
  PPARALLEL_SET_CHIP_MODE      TrySetChipMode;
  PPARALLEL_CLEAR_CHIP_MODE    ClearChipMode;
  ULONG                        FifoDepth;
  ULONG                        FifoWidth;
  PHYSICAL_ADDRESS             EppControllerPhysicalAddress;
  ULONG                        SpanOfEppController;
  ULONG                        Ieee1284_3DeviceCount;
  PPARALLEL_TRY_SELECT_ROUTINE TrySelectDevice;
  PPARALLEL_DESELECT_ROUTINE   DeselectDevice;
  PVOID                        Context;
  ULONG                        CurrentMode;
  PWSTR                        PortName;
} PARALLEL_PNP_INFORMATION, *PPARALLEL_PNP_INFORMATION;

Members

OriginalEcpController

Specifies the base physical address that the system-supplied function driver for parallel ports uses to control the ECP operation of the parallel port.

EcpController

Pointer to the I/O port resource that is used to control the port in ECP mode.

SpanOfEcpController

Specifies the size, in bytes, of the I/O port resource.

PortNumber

Not used.

HardwareCapabilities

Specifies the hardware capabilities of the parallel port. The following capabilities can be set using a bitwise OR of the following constants:

PPT_1284_3_PRESENT

PPT_BYTE_PRESENT

PPT_ECP_PRESENT

PPT_EPP_32_PRESENT

PPT_EPP_PRESENT

PT_NO_HARDWARE_PRESENT

TrySetChipMode

Pointer to the system-supplied PPARALLEL_SET_CHIP_MODE callback that a kernel-mode driver can use to change the operating mode of the parallel port.

ClearChipMode

Pointer to the system-supplied PPARALLEL_CLEAR_CHIP_MODE callback that a kernel-mode driver can use to clear the operating mode of the parallel port.

FifoDepth

Specifies the size, in words, of the hardware first in/first out (FIFO) buffer. The FIFO word size, in bits, is the value of FifoWidth.

FifoWidth

Specifies the FIFO word size, in bits, which is the number of bits handled in parallel.

EppControllerPhysicalAddress

Not used.

SpanOfEppController

Not used.

Ieee1284_3DeviceCount

Specifies the number of daisy-chain devices currently attached to a parallel port. In Microsoft Windows XP, from zero to two devices can be simultaneously connected to a parallel port. In Windows 2000, from zero to four devices can be simultaneously connected to a parallel port.

TrySelectDevice

Pointer to the system-supplied PPARALLEL_TRY_SELECT_ROUTINE callback that a kernel-mode driver can use to attempt to select an IEEE 1284.3 device.

DeselectDevice

Pointer to the system-supplied PPARALLEL_DESELECT_ROUTINE callback that a kernel-mode driver can use to deselect an IEEE 1284.3 device.

Context

Pointer to the device extension of a parallel port's functional device object (FDO).

CurrentMode

The current operating mode of the parallel port.

PortName

The symbolic link name of the parallel port.

Remarks

For more information, see Obtaining Information About a ParallelPort.

Requirements

See also

IOCTL_INTERNAL_GET_PARALLEL_PORT_INFO

PPARALLEL_TRY_SELECT_ROUTINE

PARALLEL_PORT_INFORMATION

IOCTL_INTERNAL_GET_MORE_PARALLEL_PORT_INFO

MORE_PARALLEL_PORT_INFORMATION

PPARALLEL_SET_CHIP_MODE

PPARALLEL_DESELECT_ROUTINE

PPARALLEL_CLEAR_CHIP_MODE

IOCTL_INTERNAL_GET_PARALLEL_PNP_INFO