Writing to the parallel port (Mem 0x378) when runnning WinXP or Mandrake 9.2

[Todd Gardner]

---------------------------------------------------------------
I would appreciate any ideas how to write to the parallel port (Mem
0x378) when runnning WinXP or Mandrake 9.2.

In C and LabVIEW I use the OutP command to write to directly to a
memory address.

Thank you
--
Todd
piir@earthlink. net
---------------------------------------------------------------

[Michael Geary]

Re: Writing to the parallel port (Mem 0x378) when runnning WinXP or Mandrake 9.2

Todd Gardner wrote:[color=blue]
> I would appreciate any ideas how to write to the parallel port
> (Mem 0x378) when runnning WinXP or Mandrake 9.2.
>
> In C and LabVIEW I use the OutP command to write to
> directly to a memory address.[/color]

I don't know about Linux, but in Windows NT/2000/XP you need a kernel mode device driver.

This Google search may help:

windows xp parallel port i/o driver

-Mike

[Gandalf]

Re: Writing to the parallel port (Mem 0x378) when runnning WinXPor Mandrake 9.2

Use PySerial

http://pyserial.sourceforge.net/

Laci

Todd Gardner wrote:
[color=blue]
>---------------------------------------------------------------
>I would appreciate any ideas how to write to the parallel port (Mem
>0x378) when runnning WinXP or Mandrake 9.2.
>
>In C and LabVIEW I use the OutP command to write to directly to a
>memory address.
>
>Thank you
>--
>Todd
>piir@earthlink .net
>---------------------------------------------------------------
>
>[/color]

[Gerhard Häring]

Re: Writing to the parallel port (Mem 0x378) when runnning WinXPor Mandrake 9.2

Gandalf wrote:[color=blue]
> Use PySerial
>
> http://pyserial.sourceforge.net/[/color]

I'd recommend PyParallel instead:

http://pyserial.sourceforge.net/pyparallel.html

;)

-- Gerhard

[Gandalf]

Re: Writing to the parallel port (Mem 0x378) when runnning WinXPor Mandrake 9.2

:-) Oh yeah.

I'm sorry.

Gerhard Ha"ring wrote:
[color=blue]
> Gandalf wrote:
>[color=green]
>> Use PySerial
>>
>> http://pyserial.sourceforge.net/[/color]
>
>
> I'd recommend PyParallel instead:
>
> http://pyserial.sourceforge.net/pyparallel.html
>
> ;)[/color]

[Chris Liechti]

Re: Writing to the parallel port (Mem 0x378) when runnning WinXP or Mandrake 9.2

Gandalf <gandalf@geoche msource.com> wrote in
news:mailman.10 0.1070529056.16 879.python-list@python.org :
[color=blue]
> Use PySerial
>
> http://pyserial.sourceforge.net/[/color]

thanks for recomending it :-) as a little clarification:
the link to pyparallel is here:

http://pyserial.sourceforge.net/pyparallel.html

(its only a small note on the mainpage)

currently i have only py2.2 versions available for download, but i can
easily build the 2.3 version upon request, or you can build it on your own
with mingw32 or cygwin installed: python setup.py build --compiler=mingw3 2
install

you will need giveio.sys, also available in the downloads section, that
allows programs to access the io ports on Win NT/2k/XP

chris
[color=blue]
> Laci
>
> Todd Gardner wrote:
>[color=green]
>>---------------------------------------------------------------
>>I would appreciate any ideas how to write to the parallel port (Mem
>>0x378) when runnning WinXP or Mandrake 9.2.
>>
>>In C and LabVIEW I use the OutP command to write to directly to a
>>memory address.
>>
>>Thank you
>>--
>>Todd
>>piir@earthlin k.net
>>---------------------------------------------------------------[/color][/color]

--
Chris <cliechti@gmx.n et>

[Peter Hansen]

Re: Writing to the parallel port (Mem 0x378) when runnning WinXP orMandrake 9.2

Dennis Lee Bieber wrote:[color=blue]
>
> W98 system. It works, but I've not been able to track down and prevent
> some OS preemption problem that occurs between 200 and 250 milliseconds
> into a stream of output data. This is with the process upped to
> REALTIME class, and the port "driver" thread upped to TIME_CRITICAL (a
> combination that should have the thread running at priority 31!)[/color]

Win98 is not a realtime OS, and it's unlikely you'll ever be able
to fix this sort of thing completely. There are no guarantees whatsoever
that your code, even at so-called "REALTIME" level, will have any particular
latency.

If you really need that kind of critical timing, you should use
another OS.

-Peter

[Dennis Lee Bieber]

Re: Writing to the parallel port (Mem 0x378) when runnning WinXP or Mandrake 9.2

Peter Hansen fed this fish to the penguins on Saturday 06 December 2003
05:49 am:

[color=blue]
> If you really need that kind of critical timing, you should use
> another OS.
>[/color]
Unfortunately the use of that antique (P-II, ~250MHz) laptop is
mandated -- government furnished equipment.

My current work-around is to use the high-performance counters at the
start to determine the clock rate I'm seeing, then compute how many
"segments" of data I can send in <200msec (since I've never seen the
problem appear earlier than that). I then pop up an annoying message
box that the user must "continue/cancel" between every /n/ segments
(one of the three lines is an IDLE indicator, and the port will hold
that through the interim). My current hopes are that the user
interaction will "reset" whatever in the OS sucked up the time.

--[color=blue]
> =============== =============== =============== =============== == <
> wlfraed@ix.netc om.com | Wulfraed Dennis Lee Bieber KD6MOG <
> wulfraed@dm.net | Bestiaria Support Staff <
> =============== =============== =============== =============== == <
> Bestiaria Home Page: http://www.beastie.dm.net/ <
> Home Page: http://www.dm.net/~wulfraed/ <[/color]

[Todd Gardner]

Re: Writing to the parallel port (Mem 0x378) when runnning WinXP or Mandrake 9.2

Chris Liechti <cliechti@gmx.n et> wrote in message news:<Xns94481C C1B3CFcliechtig mxnet@62.2.16.4 >...[color=blue]
> Gandalf <gandalf@geoche msource.com> wrote in
> news:mailman.10 0.1070529056.16 879.python-list@python.org :
>[color=green]
> > Use PySerial
> >
> > http://pyserial.sourceforge.net/[/color]
>
> thanks for recomending it :-) as a little clarification:
> the link to pyparallel is here:
> http://pyserial.sourceforge.net/pyparallel.html
>
> (its only a small note on the mainpage)
>
> currently i have only py2.2 versions available for download, but i can
> easily build the 2.3 version upon request, or you can build it on your own
> with mingw32 or cygwin installed: python setup.py build --compiler=mingw3 2
> install
>
> you will need giveio.sys, also available in the downloads section, that
> allows programs to access the io ports on Win NT/2k/XP
>
> chris
>[/color]
I think all I have to do is figure out how to use the outp(...)
command. Pardon my ignorance here but how do I figure out the syntax
of this command?

This is my first project in python and it seems a bit daunting. I am
trying to communicate to a custom device via the parallel port. At
this point I only want to write data to the data port. In my case the
memory address is x378.

I installed: Python 2.2, giveio_setup.ex e and
pyparallel-0.1.win32-py2.2.exe. I was running Python2.3 but I don't
think that it will matter for this newbie project.

Many thanks for all of your pointers!

Todd[color=blue]
>[color=green]
> > Laci
> >
> > Todd Gardner wrote:
> >[color=darkred]
> >>---------------------------------------------------------------
> >>I would appreciate any ideas how to write to the parallel port (Mem
> >>0x378) when runnning WinXP or Mandrake 9.2.
> >>
> >>In C and LabVIEW I use the OutP command to write to directly to a
> >>memory address.
> >>
> >>Thank you
> >>--
> >>Todd
> >>piir@earthlin k.net
> >>---------------------------------------------------------------[/color][/color][/color]

[Todd Gardner]

Re: Writing to the parallel port (Mem 0x378) when runnning WinXP or Mandrake 9.2

Chris Liechti <cliechti@gmx.n et> wrote in message news:<Xns94481C C1B3CFcliechtig mxnet@62.2.16.4 >...[color=blue]
> Gandalf <gandalf@geoche msource.com> wrote in
> news:mailman.10 0.1070529056.16 879.python-list@python.org :
>[color=green]
> > Use PySerial
> >
> > http://pyserial.sourceforge.net/[/color]
>
> thanks for recomending it :-) as a little clarification:
> the link to pyparallel is here:
> http://pyserial.sourceforge.net/pyparallel.html
>
> (its only a small note on the mainpage)
>
> currently i have only py2.2 versions available for download, but i can
> easily build the 2.3 version upon request,[/color]

I would like to request that you build a 2.3 version.
[color=blue]
> or you can build it on your own with mingw32 or cygwin installed: python
> setup.py build --compiler=mingw3 2
> install[/color]

I am quite the newbie so I would not even attempt to build it on my
own yet, soon maybe but...[color=blue]
>
> you will need giveio.sys, also available in the downloads section, that
> allows programs to access the io ports on Win NT/2k/XP
>
> chris[/color]

Thanks,

Todd

[Todd Gardner]

Re: Writing to the parallel port (Mem 0x378) when runnning WinXP or Mandrake 9.2

IT WORKS with version 2.2. ! Thank you Chris! I am not sure how I
can use version 2.3.

The code that I need to try it out was this... And I found it of all
places, in the docs... go figure :)
*************** *************** ********
import parallel
p = parallel.Parall el() #open LPT1
p.setData(0x55)
*************** *************** ********

Thank you,

Todd

[Chris Liechti]

Re: Writing to the parallel port (Mem 0x378) when runnning WinXP or Mandrake 9.2

piir@earthlink. net (Todd Gardner) wrote in
news:9b849915.0 312080136.867ba bc@posting.goog le.com:[color=blue]
> Chris Liechti <cliechti@gmx.n et> wrote in message
> news:<Xns94481C C1B3CFcliechtig mxnet@62.2.16.4 >...[/color]
[pyparallel][color=blue][color=green]
>> currently i have only py2.2 versions available for download, but i
>> can easily build the 2.3 version upon request,[/color]
>
> I would like to request that you build a 2.3 version.[/color]

at your wish (one line):

https://sourceforge.net/project/showfiles.php?group_id=46487&release_id=147

361

(thats the download section of pyserial.sf.net )

chris
--
Chris <cliechti@gmx.n et>