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
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Thanks!
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