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[ts-7000] Re: Interval measurement in TS-7400

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Subject: [ts-7000] Re: Interval measurement in TS-7400
From: "gebbet00" <>
Date: Thu, 17 Apr 2008 23:45:55 -0000
--- In  "Michael" <> wrote:
>
> > ...that you've used in a TS-7400? I've used the same in i386 and
> > x86_64 systems and of course it works OK. Problem is on TS-7400.
> > tv_usec has the same value in start and tm.
> >
> > I wanted to ask before diving into it.
> 
> 
> The Cirrus kernel that our kernel is based on has a "bug" where the 
> microsecond time only has a resolution equal to the clock tick (e.g. it 
> increments 10,000us at a time).  However if you are seeing longer
intervals 
> much longer then 10ms without no us advancement then I agree with the 
> previous poster who suggested a bug in user code.
> 
> 
>  ______   Best Regards,
> |__  __/                  Michael Schmidt
>    ||                   Software Engineer
>    ||echnologic Systems (EmbeddedARM.com)
>    || (480)    16610 East Laser Drive #10
>    |/ 837-5200   Fountain Hills, AZ 85268
>        http://oz.embeddedarm.com/~michael
>
Thanks for the response.

No I haven't checked what the minimum interval is. In fact I have a
signal-based scan time of 50 ms and that worked OK, which added to my
puzzle.

Now, what's the solution? What are the options?



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