From: Bill Unruh <unruh@physics.ubc.ca>
To: Bodo Eggert <7eggert@gmx.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: parport_pc disables parallel port on unload.
Date: Wed, 24 Sep 2008 08:50:03 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0809240849210.28430@info.physics.ubc.ca> (raw)
In-Reply-To: <E1KiTmU-0001Xx-Td@be1.7eggert.dyndns.org>
On Wed, 24 Sep 2008, Bodo Eggert wrote:
> Bill Unruh <unruh@physics.ubc.ca> wrote:
>
>> I have a parallel port module gps.c which I have written ( after the short
>> module described in Linux Device Drivers), whose purpose is to timestamp
>> the occurance of interrupts on the parallel port Ack line to as high a
>> temporal accuracy as possible.These are generated by the PPS line of a Gamin
>> 18LVC gps receiver. Since I want the highest accuracy possible I do not want
>> the latency of going through the stock drivers and waiting for a poll or
>> select to let me know an interrupt has occured.
>
>> So, could anyone point me to some relatively comprehensible documentation (
>> or "canned program") to show me how to switch the parallel port back on if
>> unloading parport_pc has switched it off.
>
> You can copy/paste the relevant parts from the parport_pc driver.
Of course, then, identifying the relevant parts becomes the problem, but
thank you.
>
>
--
William G. Unruh | Canadian Institute for| Tel: +1(604)822-3273
Physics&Astronomy | Advanced Research | Fax: +1(604)822-5324
UBC, Vancouver,BC | Program in Cosmology | unruh@physics.ubc.ca
Canada V6T 1Z1 | and Gravity | www.theory.physics.ubc.ca/
next prev parent reply other threads:[~2008-09-24 15:50 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bf4Tb-1sM-11@gated-at.bofh.it>
2008-09-24 12:47 ` Bodo Eggert
2008-09-24 15:50 ` Bill Unruh [this message]
2008-09-23 1:10 Bill Unruh
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=Pine.LNX.4.64.0809240849210.28430@info.physics.ubc.ca \
--to=unruh@physics.ubc.ca \
--cc=7eggert@gmx.de \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®