EPP parallel port

Hello,

A few years ago I have built a simple device that was communicating
the parallel port in EPP mode.

At that time I was working under DOS, the port had been programmed
directly, so there was no need in such complications as EPP mode
negotiation.

Now I want to migrate my device to Windows. Using standard Windows
drivers - I don't want to write any of my own.

I have implemented port mode negotiations as they're described at
http://www.fapo.com/negoti8.htm. After negotiating EPP mode with
DeviceIoControl(IOCTL_IEEE1284_NEGOTIATE) the port's mode sets to
EPP_SW both reading and writing, but when I'm trying to write a byte
to port, WriteFile returns error 1 - INVALID_FUNCTION. Why?

I looked at parallel.sys source code in NT4 DDK, but I have not found
there any things related to EPP/ECP. Is there source code of parallel
port driver in Windows 2000 DDK?

 

A few years ago I have built a simple device that was communicating

http://www.lvr.com/parport.htm

Lynn

 

A few years ago I have built a simple device that was communicating
LM> http://www.lvr.com/parport.htm
I was there. I am famous with parallel port standards.
I have no IEEE 1284 original, but I read its publication on
www.fapo.com.

I should also mention, that under DOS parallel port was used in
hardware EPP - all handshaking and strobing was done automatically by
port's hardware. This is to kill possible doubts that my device is
doing something wrong.

 

I've got another question: how USB parallel ports are programmed?
Is the work done by standard parport and parclass drivers, or USB
ports have their own and parclass driver just redirects all requests
to them?

 

LM>> http://www.lvr.com/parport.htm
KK> I was there. I am famous with parallel port standards.
Sorry, this is due to my bad English
I should say that I'm familar with standards