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Date: Tue, 22 Aug 2006 10:48:46 -0400
From: "Kelly Price" <strredwolf@gmail.com>
To: gentoo-embedded@lists.gentoo.org
Subject: Re: [gentoo-embedded] writing device drivers howto
In-Reply-To: <OF862175CD.D4FCACAA-ONC12571D2.004A81C0-C12571D2.004ADC8D@cnsystems.at>
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On 8/22/06, andreas.sumper@cnsystems.at <andreas.sumper@cnsystems.at> wrote:
> This is some sort of offtopic, but I guess this is the best point to ask.
> I have an embedded system running linux. I need to access some special
> registers (e.g. containing the clock cycles, ...) So I managed to write a
> very simple module, which is able to access the registers. But what makes me
> worrying now, is the way, I have to get the data into my user-space
> application. Is there some documentation, concerning writing device drivers
> and accessing them from the user space anywhere? I found some documentation,
> but either I did not understand the part about getting data from kernel
> space into user space, or it was just simply missing.
>
Check the Linux Journal on Miscellaneous Character Devices. There's
an article there you can use to base your work on.
--
Kelly "STrRedWolf" Price
http://strredwolf.furrynet.com
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