well, I am using Telosb motes and there, I know there is this alarm interface with the granulariy of 1us but again the precision width is 16 bit, which means that the alarm can only be timed at max of 65535 us, so what if I need a timer delay of 2 seconds!!! Am I right?
VG, Wasif On Fri, Oct 19, 2012 at 12:32 PM, Eric Decker <[email protected]> wrote: > > > On Fri, Oct 19, 2012 at 3:00 AM, wasif masood <[email protected]> wrote: > >> >> Sorry, I guess I was not discrete enough in my first email. I meant if >> there is something better than MSP430, more precisely a clock frequency >> that can give a timer of 1 usec granularity. >> > > huh? How do you figure that the msp430 can't get a clock granularity of > 1us? > > have you looked at any of the more modern msp430s? The 5438 can easily > run at 8MHz at 1.8 v is very low power and a pretty reasonable chip. Yeah > its TI so it is still weird but it is liveable. > > I'm running the timers on the 5438 with a 1us granularity. The basic > timing definitions on the msp430 tinyos implementation assumes a 1us ticker. > > >> >> On Fri, Oct 19, 2012 at 11:44 AM, Antonio Liñán C. >> <[email protected]>wrote: >> >>> On Fri, 2012-10-19 at 11:32 +0200, wasif masood wrote: >>> > >>> > >>> > thanks Antonio, but Z1 has the same resource constrainsts as that of >>> > Telosb platform which I want to avoid for sure. >>> >>> Only the ram constrain, I know, but I had to include it along with the >>> other 2 motes I have recommended to feel good about it ;-), however I'm >>> curious about why you prefer working with non msp430-based platforms. >>> >>> --Antonio >>> >>> > On Fri, Oct 19, 2012 at 9:30 AM, Antonio Liñán C. >>> > <[email protected]> wrote: >>> > On Fri, 2012-10-19 at 09:14 +0200, wasif masood wrote: >>> > > >>> > > >>> > > Hi all, >>> > > >>> > > >>> > > I am planning to buy some nodes but now I am no longer >>> > inclined >>> > > towards Telosbs any more. I need some suggestions about >>> > which platform >>> > > to buy, I have the following criteria in mind. >>> > > >>> > > >>> > > 1)- Resource Constraints > 48K RAM and 10K ROM, >>> > >>> > >>> > I think you have this backwards :) >>> > >>> > > 2)- Reliable Hardware, something better than MSP430. >>> > >>> > >>> > Why do you think is unreliable? >>> > >>> > > 3)- Reliable communication support, atleast CC2420 or >>> > better. >>> > > 4)- Not necessary confined to 802.15.4, or Zigbee standards. >>> > > >>> > > >>> > > Your suggestions would be highly appreciated. >>> > >>> > >>> > Personally I would recommend you the Z1 mote (shameless >>> > self-advertising, sorry), UCmotes and econotags (not ported to >>> > tinyos >>> > but this shouldn't be too dificult). >>> > >>> > --Antonio >>> > >>> > > Regards. >>> > > Wasif Masood >>> > > >>> > > >>> > > _______________________________________________ >>> > > Tinyos-help mailing list >>> > > [email protected] >>> > > >>> > >>> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help >>> > >>> > >>> > >>> > >>> > >>> > >>> > -- >>> > Wasif Masood >>> > >>> > >>> >>> >>> >> >> >> -- >> Wasif Masood >> >> >> _______________________________________________ >> Tinyos-help mailing list >> [email protected] >> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help >> > > > > -- > Eric B. Decker > Senior (over 50 :-) Researcher > > > -- Wasif Masood
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