I see. But I only know the counter Msp430CounterMicroC that provides microsecond precision on TelosB. Is it possible to convert it into an alarm or timer? Or is there already an alarm or timer at microsecond precision?
Thank you very much. On Mon, Jan 9, 2012 at 12:40 AM, Janos Sallai <[email protected]>wrote: > You can also keep the precision and widen the alarm at the same time. > > Janos > On Jan 8, 2012 11:31 PM, "Xiaohui Liu" <[email protected]> wrote: > >> Thank Janos for your generous hint. >> >> I checked TransformAlarmC, but it *decreases* precision and/or widens an >> Alarm. Since I want a microsecond alarm, this may not work, is it? Is there >> a microsecond alarm or timer I can directly leverage? If not, can you give >> some hint on how such an alarm or timer can be implemented from existing >> one(s)? Any input will be highly appreciated. >> >> On Mon, Jan 9, 2012 at 12:04 AM, Janos Sallai <[email protected] >> > wrote: >> >>> You can use lib/time/TransformAlarmC to make a 32-bit alarm from the >>> existing 16-bit one. >>> >>> Janos >>> >>> On Sun, Jan 8, 2012 at 10:54 PM, Xiaohui Liu <[email protected]> wrote: >>> > Hi all, >>> > >>> > Is there any microsecond timer on TelosB, preferably with width of 32 >>> bit? I >>> > find a counter running at microsecond Msp430CounterMicroC, which only >>> > provides current time in microseconds. But I need to fire a timer to >>> execute >>> > some code at a specified interval, in the precision of microseconds, >>> so a >>> > counter is not suitable, at least directly. >>> > >>> > Also, I want to timestamp and measure the elapsed time between two >>> events in >>> > microseconds. But Msp430CounterMicroC's width is only 16 bit, >>> measuring only >>> > up to 64 ms, which is insufficient for my timestamping purpose. >>> > >>> > Can anyone share his/her experience? I searched quite some time but >>> haven't >>> > found a suitable timer/counter/alarm on TelosB yet. Thank you in >>> advance. >>> > >>> > -- >>> > -Xiaohui Liu >>> > >>> > _______________________________________________ >>> > Tinyos-help mailing list >>> > [email protected] >>> > >>> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help >>> >> >> >> >> -- >> -Xiaohui Liu >> > -- -Xiaohui Liu
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