[riot-devel] GNRC with sleepy nodes

Robert Hartung hartung at ibr.cs.tu-bs.de
Tue Nov 21 17:35:19 CET 2017


Hi,
I didn't say it is not working. But xtimer was designed to guarantee a
resolution of 1usec. Therefore if you use it with a different timer, you
are out of spec within RIOT ;)

On 21.11.2017 17:28, Michael Andersen wrote:
> This is not quite true. Xtimer works fine with the ultra low power 32khz
> oscillator on SAMR21, it just needs a little reconfiguration. We have
> duty cycling nodes working ok with gnrc.
> 
> On Nov 21, 2017 8:26 AM, "Robert Hartung" <hartung at ibr.cs.tu-bs.de
> <mailto:hartung at ibr.cs.tu-bs.de>> wrote:
> 
>     That's the 'only' issue. Problem: xtimer is guaranteed to have 1usec of
>     resolution. Most low-power timers will only have 8bit resolution ->
>     xtimer cannot be used.
> 
>     On 21.11.2017 15:07, Francisco Molina wrote:
>     >
>     >>Issues #7743 and #7332 both discuss the problem.
>     >>
>     >>Dan
>     >
>     > I saw those issues but they only refer to the fact that xtimer doesn't
>     > run during sleep modes, is that the only issue? Cheers
>     >
>     > Francisco
>     >
>     >
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>     --
>     Robert Hartung, M.Sc.
> 
>     Technische Universität Braunschweig
>     Institut für Betriebssysteme und Rechnerverbund
>     Mühlenpfordtstr. 23, Raum 115
>     38106 Braunschweig
> 
>     Fon: +49 (531) 391 - 3264 <tel:%2B49%20%28531%29%20391%20-%203264>
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-- 
Robert Hartung, M.Sc.

Technische Universität Braunschweig
Institut für Betriebssysteme und Rechnerverbund
Mühlenpfordtstr. 23, Raum 115
38106 Braunschweig

Fon: +49 (531) 391 - 3264
Fax: +49 (531) 391 - 5936
E-Mail: hartung at ibr.cs.tu-bs.de


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