PortAccessWdm.c File Reference

Functions for communicating with the parallel port driver Only use WDM functions. More...

#include <initguid.h>
#include <wdm.h>
#include "cbm_driver.h"

Go to the source code of this file.

Functions
NTSTATUS	ParPortSetMode (PDEVICE_EXTENSION Pdx)
	Set the operational mode of the parallel port. More...
NTSTATUS	ParPortUnsetMode (PDEVICE_EXTENSION Pdx)
	Unset the operational mode of the parallel port. More...

Detailed Description

Functions for communicating with the parallel port driver Only use WDM functions.

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Author

Spiro Trikaliotis

Definition in file PortAccessWdm.c.

Function Documentation

NTSTATUS ParPortSetMode

(

PDEVICE_EXTENSION

Pdx

)

Set the operational mode of the parallel port.

This function sets the operational mode of the parallel port.

Parameters

Pdx	Pointer to a device extension which contains the DEVICE_OBJECT of the parallel port driver.

This function has to be balanced with a corresponding ParPortUnsetMode()

This function must be run at IRQL == PASSIVE_LEVEL.

Definition at line 37 of file PortAccessWdm.c.

References FUNC_ENTER, and ParPortSetModeWdm().

Referenced by cbm_lock_parport().

NTSTATUS ParPortUnsetMode

(

PDEVICE_EXTENSION

Pdx

)

Unset the operational mode of the parallel port.

This function unsets the operational mode of the parallel port.

Parameters

Pdx	Pointer to a device extension which contains the DEVICE_OBJECT of the parallel port driver.

This function mustn't be called without a prior call to ParPortSetMode()

This function must be run at IRQL == PASSIVE_LEVEL.

Definition at line 58 of file PortAccessWdm.c.

References FUNC_ENTER, and ParPortUnsetModeWdm().

Referenced by cbm_lock_parport(), cbm_unlock_parport(), and ParPortSetModeWdm().