Re: [Xenomai-help] more questions

[David Wiebe <dwiebe2@domain.hid>]

On 11-06-26 08:17 AM, Gilles Chanteperdrix wrote:
> On 06/26/2011 05:17 AM, David Wiebe wrote:
>> Hello,
>>
>> I have kernel 2.6.35.9 patched with xenomai for arm(beagleboard xm).
>>
>> #1. rt_dev_ioctl as replacement for ioctl. My test program compiles,
>> runs but does not perform as it should. If I change rt_dev_ioctl back to
>> ioctl, everything works fine. What might I be missing?
> Hi,
>
> We do not know
> - which ioctl you are trying to use
I'm trying to get an spi port on the beagleboard to work in realtime.
I didn't know there were other ioctl's. I wrote a program with ioctl, 
tested it to make sure it worked, which it did, then changed ioctl's to 
rt_dev_ioctl's in hopes that doing so would enable real time behaviour. 
The program with rt_dev_ioctl's did not run as desired(no spi). I guess 
I can't simply change ioctl's with rt_dev_ioctl's to enable real time 
functionality? Do I have to patch xenomai to enable spi or something?
> - which driver you have written/loaded to implement this ioctl
I thought changing ioctl for rt_dev_ioctl was all that was required to 
implement this device in realtime mode. This device is an spi port.
> - what you mean by "my program does not perform as it should", what is
> the return value of this rt_dev_ioctl which is supposed to work?
>
I watch my oscilloscope for activity on the spi port. regular ioctl 
worked, rt_dev_ioctl did not. Both programs ran but only one worked.
>> #2. rtnet. I wrote a test snippet of code to test the ethernet part.
>> Prepended the appropriate functions with rt_dev_ and same results as in #1.
>>
>> I assume that if something wasn't in the library I would get compiler
>> errors and if the code running on the beagleboard  was bad, I would get
>> run time errors. I have seen neither.
> Again, what driver are you trying to use? What happens when you try and
> configure it?
>
So I have to patch the ethernet driver in order for it to work? I though 
that was taken care of when I patched the kernel with xenomai.
>> Are there any books or more learning materials out there for me to
>> study? Any and all feedback appreciated.
> I would suggest starting with "Linux device drivers", it would give you
> an idea of how things are divided between drivers and applications.
> xenomai follows the same division. Then you can read the documents
> listed here:
> http://www.xenomai.org/index.php/Included_documentation_summary
> and here:
> http://www.xenomai.org/index.php/Publications
>
> To have a better idea on how to work with xenomai.
>> David
>>
>> _______________________________________________
>> Xenomai-help mailing list
>> Xenomai-help@domain.hid
>> https://mail.gna.org/listinfo/xenomai-help
>>
Thanks!