Date: Sun, 10 Jan 1999 18:51:00 +0100 (CET) From: Alexander Leidinger <netchild@wurzelausix.cs.uni-sb.de> To: nsouch@teaser.fr Cc: current@FreeBSD.ORG Subject: Re: nlpt & polling mode didn't work Message-ID: <199901101751.SAA00559@Vodix.CS.Uni-SB.de> In-Reply-To: <19990109203041.00416@breizh.prism.uvsq.fr>
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On 9 Jan, Nicolas Souchu wrote:
>>No. lpt didn't work, but I remember it didn't work the first time I
>>tried it too. It worked only with nlpt.
>
> Timing then. nlpt is slower than lpt because of indirection calls. So
> something must have speedup the machine because nothing changed in nlpt since
> it was properly working.
??? Just a
make world
and a
make XFree-3.3.3
>>> You may add printfs to the /sys/dev/ppbus/nlpt.c to check where it fails.
>>
>>To nlpt_pushbytes()?
>>What am I looking for?
>
> Yes and nlpt_write(). You may add something like this for ppb_wxx() calls:
>
> u_char cc;
> do {
> cc = STROBE_or_what_else;
> ppb_wctr(..., cc);
>
> } while (ppb_rctr(...) != cc);
>
> to be sure ppb_wxxx() are correctly done.
> And you may add delays here and there to slow down the driver.
What about
options NLPT_DEBUG
in the kernel, does this show something interesting too?
I had it turned on on my machine, but I didn't know to interprete the
messages.
Bye,
Alexander.
--
"Darth Vader sleeps with a Teddywookie."
Fortune cookie
http://netchild.home.pages.de/ A.Leidinger @ wurzelausix.cs.uni-sb.de
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