[Xenomai-help] A couple of questions

[Xenomai-help] A couple of questions

[smannori]

Hi everybody:

I think that this fork is a very good opportunity to "start with the
right foot". I believe also that a document like

https://mail.rtai.org/pipermail/rtai/2005-June/011949.html

but with Fusion/Xenomai it would be a very good starting point for a
relatively inexperienced user. What I do until now:
- I dowloaded, adeos-patched, configured & compiled kernel 2.6.13.4
- I downloaded, configured, installed fusion 0.9.1
- I run sucessfull all the [testsuite] examples
- I dowloaded all the pdf(s)

Now the questions:
1) it is important dowload and install fusion OR xenomai ?
2) why the xenomai files are so old (2002) ?
3) I think that a very important PDF file - already present in the past
in www.rtai.org - is missed: the Fusion tutorial with examples.
4) where I can find some Fusion/Xenomai examples, complete of instruction
to compile and link to create standalone applications ?
5) how is it possible to use Comedi driver ?
6) how port xrtailab under Xenomai/Fusion ?
7) it is possible use USB device (eg. camera) realtime ?

Thanks in advance for your help

                               Simone Mannori

Re: [Xenomai-help] A couple of questions

[Philippe Gerum]

smannori@domain.hid wrote:
> Hi everybody:
> 
> I think that this fork is a very good opportunity to "start with the
> right foot". I believe also that a document like

Well, technically it's a split, not a fork; i.e. you don't fork your own code 
out of yourself. The RTAI 3.x and RTAI/fusion codebases have always been 
separate, basically because they can't mix properly at core level and pursue 
different goals. Hence the split.

> 
> https://mail.rtai.org/pipermail/rtai/2005-June/011949.html
> 
> but with Fusion/Xenomai it would be a very good starting point for a
> relatively inexperienced user. What I do until now:
> - I dowloaded, adeos-patched, configured & compiled kernel 2.6.13.4
> - I downloaded, configured, installed fusion 0.9.1
> - I run sucessfull all the [testsuite] examples
> - I dowloaded all the pdf(s)
> 
> Now the questions:
> 1) it is important dowload and install fusion OR xenomai ?

Xenomai. RTAI/fusion is dead; all fusion contributors moved to Xenomai.

> 2)  why the xenomai files are so old (2002) ?

Which ones? Those under the attic/ directory? Well, because Xenomai has been 
founded in 2001, and what you see there are the versions released up to 1.1.1, 
before the project had decided to merge with RTAI in 2003, in order to  produce 
a pervasive and highly integrated real-time framework for the GNU/Linux 
environment, based on the initial Xenomai codebase.

What we have done is basically a retro-merge, getting back our independence so 
that we can continue the development effort in a more consistent manner. The 
next version based on the latest CVS tree from RTAI/fusion 0.9.1 with additional 
updates will then be 2.0. For the time being, only our development tree 
(http://gna.org/svn/?group=xenomai) is available since there has been no formal 
release of "Xenomai reloaded" yet.

> 3) I think that a very important PDF file - already present in the past
> in www.rtai.org - is missed: the Fusion tutorial with examples.

They have been restored there.
http://download.gna.org/xenomai/documentation/

They will be referenced by our new website as soon as it is available.

> 4) where I can find some Fusion/Xenomai examples, complete of instruction
> to compile and link to create standalone applications ?

Look at the demos/ directories under the various skins. Some of the PDF 
documents available from the URL above give more.

> 5) how is it possible to use Comedi driver ?

Alex did a port of Comedi over RTAI/fusion. It will need to be rejuvenated over 
Xenomai.

> 6) how port xrtailab under Xenomai/Fusion ?

Don't know. But if you do know xrtailab enough, you should have more clues than 
I do regarding the port though.

> 7) it is possible use USB device (eg. camera) realtime ?
> 

AFAIK, a generic effort has been started:
http://developer.berlios.de/projects/usb4rt

-- 

Philippe.

Re: [Xenomai-help] A couple of questions

[berlemont.hauw]

Hi,

>
>> 5) how is it possible to use Comedi driver ?
>
> Alex did a port of Comedi over RTAI/fusion. It will need to be 
> rejuvenated over Xenomai.
>

No problem, I will do it as soon as possible. I just have to find my 
way through
the mess in my new appartment, I am still looking for some parts of my 
computer
;)

Sorry for answering so lately.

Alexis.

Re: [Xenomai-help] A couple of questions

[smannori]

Alexis:

> No problem, I will do it as soon as possible. I just have to find my
way through
> the mess in my new appartment, I am still looking for some parts of my
computer
> ;)
>
> Sorry for answering so lately.
>

No apologies :).

May I suggest you the "windows way":
- pull all the things off you appatement e.g. ALT-F4
- restart the [appartement]
- put the things inside the appartement one at time :)

Simone Mannori

Re: [Xenomai-help] A couple of questions

[Jan Kiszka]

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smannori wrote:
> Hi everybody:
> 
> I think that this fork is a very good opportunity to "start with the
> right foot". I believe also that a document like
> 
> https://mail.rtai.org/pipermail/rtai/2005-June/011949.html
> 
> but with Fusion/Xenomai it would be a very good starting point for a
> relatively inexperienced user. What I do until now:
> - I dowloaded, adeos-patched, configured & compiled kernel 2.6.13.4
> - I downloaded, configured, installed fusion 0.9.1
> - I run sucessfull all the [testsuite] examples
> - I dowloaded all the pdf(s)
> 
> Now the questions:
> 1) it is important dowload and install fusion OR xenomai ?

Fusion-0.9.1 is, so to say, the current release of Xenomai. Xenomai 2.0
will be the next one soon.

> 2) why the xenomai files are so old (2002) ?

That version are pre-fusion actually. Latest Xenomai is only available
via subversion checkout, see https://gna.org/projects/xenomai

> 3) I think that a very important PDF file - already present in the past
> in www.rtai.org - is missed: the Fusion tutorial with examples.

Some are already there (http://download.gna.org/xenomai/documentation).
Please report precisely what you are lacking.

> 4) where I can find some Fusion/Xenomai examples, complete of instruction
> to compile and link to create standalone applications ?

For which skin, i.e. for which user API (native, POSIX, classic RTAI)?
Also check the /doc folders in the skins source code directories.

> 5) how is it possible to use Comedi driver ?

Maybe with some (or more) adaptions in combination with the RTAI
compatibility skin. Out ouf the box: not yet.

On the long term, it would be good to port Comedi over the RTDM layer,
thus also enabling a reuse under other real-time Linux variants. This
would reduce the burden for Comedi to adapt itself to differen APIs.
That's a kind of discussion for xenomai-core BTW. ;)

> 6) how port xrtailab under Xenomai/Fusion ?

Don't know details about it, but the first step could again be the RTAI
skin.

> 7) it is possible use USB device (eg. camera) realtime ?

USB4RT is a (currently dormant) project to provide low-level USB access.
We have a special camera driver for the stack here. Other devices would
require a port (Do you have a native Linux driver for the desired
camera?). Moreover, USB4RT will first require a cleanup adaption to the
latest developement around Fusion/Xenomai, e.g. a port over the RTDM
layer. Scheduled, but I cannot give any dates for this.

Jan

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