--- In "fabianmejia" <>
wrote:
>
> Hi All,
>
> I am under development of a capture system. I need to sample about
> 200Hz. That is, about sampling each 0.005 seconds.
>
> I have it working using the Jim Jackson's adc_logger.
>
> Unfortunatelly, this can't accomplish the job as it's accurate
about 10ms.
>
> So, I decided using gettimeofday. Oh surprise!!! It doesn't work
> properly. microsecond precision? Forget about it. Readings give me
> mumbers like this:
>
> 510000
> 530000
> 550000
>
> It sounds like 10msec precision.
>
> Next step, checking the TS7000 group. I downloaded the file:
> linux24_ts8-lck1-cpufreq-230705.patch.gz
>
> I have a ts11 version. Will this work?
>
> A noob question: How to have this working? I suppose using the
"patch"
> command. I ran "patch -p0 lin.......". By the time I am writing
this,
> the command is still running without showing any message.
>
> If this command finishes, what will be the outcome? Having the
> "gettimeofday" working properly?
>
> Can I get cpu ticks or something like that in order to have the
real
> microsecond precision?
>
> Regards.
>
I recommend you read `man patch` for the use of patch command.
You may want to look at realtime linux refered to in the TS doc if
you need faster more accurate timing.
/js
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