Thank you for your response. The current version of Linux kernel on the TS-7500
does not support RT? Does this mean that before I can attempt to apply the
patch I will need to upgrade my Linux Kernel?
Thank you,
Komal RAUF
--- In João Trindade <> wrote:
>
> I don't think that patch will work on the ts-7500.
>
> On Mon, Apr 2, 2012 at 8:39 AM, komal <> wrote:
>
> > **
> >
> >
> > Dear Sir,
> >
> > I have recently acquired a ts-7500 board with the development kit. The SD
> > card comes with a 2.6.24 Linux Kernel. After a few days of experimenting I
> > have realized that my application (controlling a servo through PWM) will
> > require HRT and RT support which the Kernel is unable to provide (maximum
> > timer resolution I am getting on the current Kernel is 20ms).
> >
> > I am new to Linux and embedded systems development and hence I am a little
> > confused about how to tackle this problem. I do not understand what you
> > mean by applying the patches and how to apply the patch. Can i simply do it
> > on-board my board with the SD-Card. I have a windows PC with Eclipse for
> > Development.
> >
> > Any help you can provide me will be highly appreciated. Thank you.
> >
> > Regards,
> > Komal RAUF
> >
> > --- In Peter Gammie <peteg42@> wrote:
> > >
> > > Charles, any anyone interested in hrtimers:
> > >
> > > With Andrew's help I managed to build a 2.6.32.3 kernel that seems to
> > work. Attached are a config and a patch, based on this:
> > >
> > > http://lkml.org/lkml/2009/7/22/119
> > >
> > > that enable hrtimers. I've lightly tested it on a ts7260 with 64Mb of
> > memory. I loaded the kernel via TFTP with:
> > >
> > > load -r -b 0x00218000 -h 192.168.1.1 z
> > > exec -c "console=ttyAM0,115200 ip=192.168.1.50:192
> > .168.1.1:192.168.1.1:255.255.255.0:ts7200a:eth0:off root=/dev/mtdblock1"
> > >
> > > (i.e. no special memory options or anything.)
> > >
> > > So the routine is to apply Matthieu's patches, then this one. I expect
> > it will apply to other kernel versions (specifically 2.6.29.6 if you want
> > -RT) without too much bother - but be careful that the Kconfig patch
> > applies to the right system type!
> > >
> > > As for the clock multiplexing, Charles's suggestion of using just a
> > PREEMPT (not RT) kernel results in better behaviour under light periodic
> > load (it doesn't flicker while running top on the console) but about the
> > same under heavier load (scp'ing a few megabytes via ethernet). I have the
> > CONFIG_NO_HZ (tickless) option set, which may or may not do anything in
> > particular...
> > >
> > > So, more investigation is required.
> > >
> > > Thanks for all your help.
> > >
> > > cheers
> > > peter
> > >
> > >
> > >
> > >
> > > --
> > > http://peteg.org/
> > >
> >
> >
> >
>
>
>
> --
> João Trindade <>
> Telephone: +351 93 561 39 10
> http://cnm.tagus.inesc-id.pt/joao+trindade
>
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