On Sun, Mar 14, 2010 at 23:50, Attila Strba <st...@yahoo.com> wrote: > Hi Guys, > > > I am trying to port the TinyOS to the Dolphin EO3000I chip from EnOcean and > I have a poblem with the Timer precission. > > As I read from the TEP 102, it is written that the HLP timer interface > should provide either 32kHz or 1ms or 1us tick precision. The Dolphin runs > on 16MHz clock. The Timer0 I am trying to use is 16bit, uses the same clock > source and it has the possibility to use either 2,4,8 prescaler. But that's > all, so in best case using prescaler 8 I would get 0.5us pro 1 tick. > > > The TEP 102 is only specifying how the HIL _must_ look, and provides examples how the lib/timer components can be used to build a flexible HAL layer. The HPL component interfaces are fully driven by the hardware characteristics, so you can do whatever you like there.
> My question is what to do with this? I am far away from the values TEP102 > considers. The transformation components are only for the width adjustment > right? (i.e. TransformAlarmC). > Or should I manually adjust the values I get through the HPL interface > using constants (multiplication of the input values by 2) such way that I > get 1us interface? > > My suggestion is to expose the maximal precision on HPL and as Counters/Alarms on HAL level and then use TransformAlarmC which also transforms precision (to a lower one) to provide the HIL. Vlado > Any help is highly apritiated, > > greetings > > Attila > > > > > _______________________________________________ > Tinyos-help mailing list > Tinyos-help@millennium.berkeley.edu > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help >
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