Hi Wasif, The cc2420x stack should be straightforward to set up with the z1. Just follow how it's set up on the telos.
One thing it needs is a fast SPI bit rate. My suspicion is that the SPI on the z1 is configured with 256 or 512 kbps bit rate, though I can't confirm this. You might want to take a look at the directory tos\platforms\telosa\chips\cc2420x\tmicro to see how I have reconfigured the telos clock subsistem to speed up the SPI. Most probably, the same has to be done with the z1. Since it has a slightly different MCU than the telos, the code in that directory will probably have to be altered a bit to work on the z1. Janos On Wed, Jan 9, 2013 at 2:28 PM, Miklos Maroti <mmar...@math.u-szeged.hu> wrote: > Hi Wasif! > > Ucmini uses the atmega128rfa1 chip (and not the cc2420) and it is > fully supported in tinyos, just type "make ucmini". > > Miklos > > On Wed, Jan 9, 2013 at 11:55 AM, wasif masood <rwmas...@gmail.com> wrote: >> >> Thanks alot Janos! it seems to work now, it was a clumsy mistake on my side. >> Another Questions, make z1 CC2420x doesn't work. Do u ever have any >> experience with that! and also neither for UCMINI. >> >> Regards, >> Wasif! >> >> >> On Wed, Jan 9, 2013 at 4:25 PM, Janos Sallai <janos.sal...@vanderbilt.edu> >> wrote: >>> >>> Wasif: >>> >>> Regarding setting the backoff values to 1us in the cc2420x stack: this >>> clearly doesn't work, because the code would schedule an alarm 1us in the >>> future, which is simply not possible. By the time the operation of >>> scheduling the alarm completes, that time instant is going to be in the >>> past, and the alarm will fire after the counter overflows and reaches that >>> particular value again. To put it in another way: backoff values under >>> (approximately) 200 microseconds are not valid. >>> >>> To get rid of CSMA logic altogether, you need to remove the collision >>> avoidance layer altogether and rewire the stack (CC2420XRadioC.nc) as I have >>> described in my previous email. >>> >>> Janos >>> >>> >>> On Wed, Jan 9, 2013 at 5:31 AM, wasif masood <rwmas...@gmail.com> wrote: >>>> >>>> >>>> Hi all, >>>> >>>> I am trying to measure the message delay on Telosb platform and now >>>> comparing the CC2420 stack with CC2420X stack. Below are the two Histograms >>>> showing the delay spread of Cc2420 and CC2420X stacks respectively. The >>>> experiment is perfromed for around 1 hr at the same time using two >>>> different >>>> frequency channels. >>>> For CC2420X I have used the TimeSyncAMSend<TMicro,uint32_t> interface >>>> and have calculated the delay at the receiver end as >>>> >>>> delay = call LocalTimeMicro.get() - call TimeSyncPacket.eventTime(msg) >>>> >>>> and for CC2420 Stack, I have used TimeSyncAMSend with Milli sec >>>> precision and have calculated the delay as : >>>> >>>> delay = call LocalTimeMilli.get() - call TimeSyncPacket.eventTime(msg) >>>> >>>> in case of CC2420 stack CCA is disabled and for CC2420X stack, I have >>>> changed RandomCollisionConfig implementatoin in CC2420XRadioP module in >>>> such >>>> a way that all types of backoff values ( Initial, minimum and congestion) >>>> are now just RADIO_ALARM_MICROSEC value (because I couldn't find a direct >>>> way to disable it). >>>> >>>> Now, what I observe is a bit interesting since the two histograms show a >>>> completely different delay behaviors, ie. with the Cc2420X stack the delay >>>> ranges between 1 to 13ms, but with CC2420X stack the delay goes from 70ms >>>> to >>>> 150ms. Is this also what any of you experience or is there something I am >>>> missing here? >>>> >>>> here are the histograms: >>>> >>>> http://s14.postimage.org/55bs7ni0x/Telosb_CC2420x.png >>>> >>>> http://s8.postimage.org/8paur8s6d/Telosb_CC2420.png >>>> >>>> >>>> Regards, >>>> Wasif Masood >>>> >>>> _______________________________________________ >>>> Tinyos-help mailing list >>>> Tinyos-help@millennium.berkeley.edu >>>> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help >>> >>> >> >> >> >> -- >> Wasif Masood >> >> _______________________________________________ >> Tinyos-help mailing list >> Tinyos-help@millennium.berkeley.edu >> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > _______________________________________________ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
