Re: [BLACKBOX] Seasoned Linux.

From: [at]} <Norayr>
Date: Thu, 13 Jan 2011 23:04:48 +0400

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Wojtek, do you aware, how to get a virtual ucLinux/Blackfin environment?
Is it possible to download an image for Qemu? Short search didn't help me.
It is interesting to take a look on it ( the library interfaces, try to
compile sample code, check library and kernel versions, etc.)
I always prefer virtual or native image, do not like to crosscompile. I
guess because it is simpler, may be. That's personal.
Do you crosscompile, and then upload resulting binaries to the device?
Could you describe in a couple of words your workflow, may be? :)

Sincerely,
Norayr


On 01/13/11 08:58, Wojtek Skulski wrote:
> On Thu, 13 Jan 2011, Norayr Chilingarian wrote:
>
>> My main question is which are limitations of your hardware? I guess if
>> it runs GNU/Linux and X server, then it is powerful enough to draw GTK
>> widgets.
>
> Two different boards are shown at http://www.skutek.com/VME.htm and on
> http://www.blackstamp.net. Both board run ucLinux, which is a MMU-less
> port of the Linux kernel. The limitations of ucLinux are described here:
> http://docs.blackfin.uclinux.org/doku.php?id=presentations:uclinux-dist:intro
>
>
> Note that ucLinux is using uClibc, which is both small and fast, but
> more limited than glibc.
>
> Another limitation is that the embedded systems are not using full
> X-windows, but rather Nano-X/MicroWindows. I am still uncertain whether
> one can cast a remote display using Nano-X. I asked several times on
> Nano-X mailing list and I could not comprehend the answers. I think yes,
> but I am not sure yet.
> http://docs.blackfin.uclinux.org/doku.php?id=uclinux-dist:microwindows
>
>> Do you mind using GTK?
>
> I do not know. At this point I am using gnuplot embedded on my board,
> which is very slow and very limited. I am guessing anything else would
> be better. But I do not want anything overly complex. The simpler, the
> better. ("Make it as simple as possible, but not simpler.")
>
> In any case, it has to use Nano-X because full X-windows is not available.
>
>
>> (Besides, FreePascal basic libraries do not contain calls to the GNU
>> system (or let's say GNU C Library). They only interface to kernel API.
>> This allows them to not have dependencies from the GLIBC versions, fpc
>> compiled binaries work just on top of Linux kernel, without the GNU
>> system.)
>
> Not using glibc sounds good to me because ucLinux should not use glibc.
>
>
> As you can see, I am hardly an expert in all this embedded software.
> Most of it is way above my head.
>
> Wojtek
>
>
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Received on Thu Jan 13 2011 - 20:04:48 UTC