How to call Parallel Port driver dispatch routine

I want to use a parellel port from my custom driver. I'm now trying to send
my own IRP to parallel port driver. When I try to call IoCallDriver() using
parallel port device object pointer, my system crush with bug check code
0x19, 0x35, or 0x44.

1) How can I build custom driver's own IRP ?
I call IoAllocateIrp() and then call IoSetNextIrpStackLocation(). To get
stack location, I call IoGetNextIrpStackLocation(). Is my procedure right?

2) How can I get parallel port device object pointer?
I use the pointer which I get using IoGetDeviceObjectPointer() directly. How
should I use file object pointer?

Thanks in advance.

Takashi Masuda
Sony Co.

 

I want to use a parellel port from my custom driver.

Find the NT4 DDK . It has several samples showing how to talk to the
parallel port driver.

Leo Havmøller.

 

Tak,

#1) What IRP are you sending down? Depending on what irp you are sending,
you may also use IoBuildAsynchronousFsdRequest,
IoBuildDeviceIoControlRequest or IoBuildSynchronousFsdRequest.

To use IoAllocateIrp, you don't want to call IoSetNextIrpStackLocation. You
are passing an uninitialized i/o stack to the target driver.

#2) Assuming you have got the device object so the call looks good. If you
don't use the file object, the normal practice is take a reference count to
the device object then de-reference the file object (not the other way
around).

I'm sure someone on this group would suggest you to use KMDF or WDF. Playing
with IRP nowadays seems toooo old fashioned.

--
Calvin Guan (DDK MVP)
Sr. Staff Engineer
NetXtreme NTX Miniport
Broadcom Corporation
Connecting Everything(r)

 

that woudl be me . KMDF will make all of these issues go away. KMDF lets
you easily create, format and send IRPs to a device w/out worrying about
buffers or stack locations. you can download KMDF from
http://www.microsoft.com/whdc/driver/wdf/KMDF_pkg.mspx and look at the
samples. toastmon shows how to open a device based on device interface
notifications.

d