OpenCBM: PortAccessNt4.c File Reference

OpenCBM

Functions for communicating with the parallel port driver, NT4 version. More...

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

Go to the source code of this file.

Macros
#define	AdvancedEPPTests 1
	search for unusual EPPs More...

Enumerations
enum	lptMode { lptN_A = 0, lptSPP = 1, lptPS2 = 2, lptEPP = 3, lptECP = 4, lptEPPc = 5 }

enum	ecpMode { ecpNOECR = 0, ecpSTNDRD = 1, ecpBYTE = 2, ecpSTDFIFO = 3, ecpECPFIFO = 4, ecpEPP = 5, ecpRESVRD = 6, ecpFIFOTST = 7, ecpCONFIG = 8 }

Functions
NTSTATUS	ParPortSetModeNt4 (PDEVICE_EXTENSION Pdx)
	Set the operational mode of the parallel port, NT4 version. More...

NTSTATUS	ParPortUnsetModeNt4 (PDEVICE_EXTENSION Pdx)
	Unset the operational mode of the parallel port, NT4 version. More...

VOID	cbmiec_udelay (IN ULONG howlong)
	Wait for a timeout. More...

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, NT4 version.

Author: Spiro Trikaliotis

Definition in file PortAccessNt4.c.

Macro Definition Documentation

#define AdvancedEPPTests 1

search for unusual EPPs

Set AdvancedEPPTests to 1 if you want to try searching for unusual EPPs But take notice that the functionality of this test is not guaranteed!

Definition at line 33 of file PortAccessNt4.c.

Enumeration Type Documentation

the available ecp modes

Enumerator
ecpNOECR	no ECP-Port found
ecpSTNDRD	standard mode
ecpBYTE	BYTE mode
ecpSTDFIFO	Standard FIFO mode
ecpECPFIFO	ECP FIFO mode
ecpEPP	EPP mode
ecpRESVRD	reserved mode
ecpFIFOTST	FIFO test mode
ecpCONFIG	config mode

Definition at line 47 of file PortAccessNt4.c.

the mode the parallel port is in

Enumerator
lptN_A	no parallel port
lptSPP	SPP parallel port
lptPS2	PS2 parallel port
lptEPP	EPP parallel port
lptECP	ECP parallel port
lptEPPc	EPP with special control word to enable

Definition at line 36 of file PortAccessNt4.c.

Function Documentation

VOID cbmiec_udelay ( IN ULONG Howlong )

Wait for a timeout.

This function waits for a timeout. Waiting means that we want to have an exact timing, so don't give away the processor.

Parameters

Howlong How long to wait (in us)

Definition at line 66 of file libiec/util.c.

References FUNC_ENTER, and FUNC_LEAVE.

Referenced by ParPortSetMode().

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 532 of file PortAccessNt4.c.

References cbmiec_udelay(), FUNC_ENTER, ParPortSetModeNt4(), and ParPortSetModeWdm().

NTSTATUS ParPortSetModeNt4 ( PDEVICE_EXTENSION Pdx )

Set the operational mode of the parallel port, NT4 version.

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 ParPortUnsetModeNt4()

This function must be run at IRQL == PASSIVE_LEVEL.

Definition at line 445 of file PortAccessNt4.c.

References DBG_PREFIX, DBG_PRINT, ecpBYTE, ecpNOECR, FUNC_ENTER, lptECP, lptN_A, lptSPP, and WRITE_PORT_UCHAR.

Referenced by ParPortSetMode().

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 568 of file PortAccessNt4.c.

References FUNC_ENTER, ParPortUnsetModeNt4(), and ParPortUnsetModeWdm().

NTSTATUS ParPortUnsetModeNt4 ( PDEVICE_EXTENSION Pdx )

Unset the operational mode of the parallel port, NT4 version.

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 ParPortSetModeNt4()

This function must be run at IRQL == PASSIVE_LEVEL.

Definition at line 496 of file PortAccessNt4.c.

References DBG_PREFIX, DBG_PRINT, FUNC_ENTER, and lptECP.

Referenced by ParPortUnsetMode().