Hi paul In which directory can I find the code of FTSP for T2? Thanks
On Fri, Apr 11, 2008 at 12:52 AM, Branislav Kusy <[EMAIL PROTECTED]> wrote: > hi paul, > > i haven't really written timer routines - they are part of T2. i was > only testing FTSP for micaZ and the component that provides TMicro > counter for micaZ is tos/platforms/mica/CounterMicro32C.nc > > i just did a quick search and i found > tos/chips/msp430/Msp430CounterMicroC.nc which provides 16 bit TMicro > counter. perhaps you can use it? anyways, TMicro on telos platform is > much less useful for timesync, since the cpu is turned off whenever > there is no work to be done (ie. no tasks in the scheduler). thus your > TMicro based TimeSync will be inconsistent - the time will not grow > linearly. > > T32khz clock is based on real-time clock, which keeps running even when > cpu is in standby. T32khz accuracy should be sufficient for all > practical purposes. > > brano > > [EMAIL PROTECTED] wrote: > > Dear Brano Kusy, > > > > I had a look at the SenSys'04 paper "The Flooding Time Synchronization > > Protocol". Very interesting. I was pleased to see that you have > > transferred the software from TinyOS-1.x to TinyOS-2.0. > > > > My installed TinyOS-2.0 system does not (yet) comprise the timer > > routines with "Micro" resolution, but "32khz" resolution is available. > > Three resolutions are promised in my manuals, but only "32khz" exists > > really. > > > > I wonder if you have the "Micro" library routines (Can I get them? > > What's required for their installation?), or did you include them in the > > software in hope for the arrival of a TinyOS version containing them? > > > > Aside: > > I am using TelosB motes, or actually home-brew derivatives. The CPU is > > an MSP430 and, if you care about such things, its internal timer runs at > > 1048 kHz (MCLK = 32 kHz * 131/4). I have no idea why TI designed it > > that way, but this weird factor feeds through to all timers. My guess > > is, TinyOS-2.0 divides MCLK by 32 to get "32khz" (really 32.75 kHz) and > > divides it again by 32 to get "Milli" (really 1.0234 kHz). > > > > Best regards from > > Paul Pilgram. > > > > > > > _______________________________________________ > Tinyos-help mailing list > [email protected] > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > -- Renjie Huang Sensorweb Research Laboratory http://sensorweb.vancouver.wsu.edu/ Washington State University
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