--- In "charliem_1216" <> wrote:
>
> --- In "dieghuot" <dieghuot@> wrote:
> >
> > The stock Kernel on the TS-7800 does not provide HRT or Real-Time
> > capabilities and this makes me very sad...
> >
> > MICROSECOND RESOLUTION on timers with very low overhead, most RT
> > capabilities HUM HUM.
> >
> > My question is: Did anyone try the apply the kernel patches (HRT is
> > available from 2.6.24) or the CONFIG_PREEMT_RT patch?
>
> Hi Diego --
>
> I have used HRT & CONFIG_PREEMPT with a 2.6.21 or .22 kernel, but that
> is on a TS-7250 board (ep9302 chip). They work very well; as you
> said, microsecond resolution, very low overhead and very low latency.
>
> HRT for the marvel chip in the TS-7800 have been in mainline kernel
> since 2.6.27, and a few HRT fixes will be in 2.6.28 (not related to
> TS-7800), but I don't have a TS-7800 to try out.
>
> Please post your results if you try it. There are several latency &
> HRT testing programs available.
>
> Regards, ......... Charlie
>
> >
> > Diego,
> >
>
Charlie,
Thanks for the info, I saw the work that was done for the Marvell chip
and the ts-7800 on the 2.6.27. At the moment I am fine-tuning my
rs-485 interface and have SPI and ADC on the to-do list. I am
concerned that installing a new kernel right now would introduce too
many untested variables to the project...
That being said, I do need Real-Time and RTAI is off the table (too
disruptive, and not portable) so I will tackle the kernel upgrade soon
because:
1) I can live with "close to Hard Real Time"
2) Mainline support is just too good to pass...
I will post my findings.
Diego,
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