Date: Mon, 11 Jan 1999 20:45:14 +0000 From: Nicolas Souchu <nsouch@teaser.fr> To: Alexander Leidinger <netchild@wurzelausix.cs.uni-sb.de> Cc: current@FreeBSD.ORG Subject: Re: nlpt & polling mode didn't work Message-ID: <19990111204514.59206@breizh.prism.uvsq.fr> In-Reply-To: <199901101751.SAA00559@Vodix.CS.Uni-SB.de>; from Alexander Leidinger on Sun, Jan 10, 1999 at 06:51:00PM %2B0100 References: <19990109203041.00416@breizh.prism.uvsq.fr> <199901101751.SAA00559@Vodix.CS.Uni-SB.de>
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On Sun, Jan 10, 1999 at 06:51:00PM +0100, Alexander Leidinger wrote:
>>
>> 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
See the handbook for recompiling your kernel.
>
>>>> 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.
NLPT_DEBUG is supposed to print debug info needed when the driver was written.
See /sys/dev/ppbus/nlpt.c for the meaning of outputs. You'll have to
had _your_ printfs or change the 3rd party card. Parallel port cards are not
expensive today..
>
>Bye,
>Alexander.
>
>--
> "Darth Vader sleeps with a Teddywookie."
> Fortune cookie
>http://netchild.home.pages.de/ A.Leidinger @ wurzelausix.cs.uni-sb.de
>
>
--
nsouch@teaser.fr / nsouch@freebsd.org
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