I don't think it should consume that much power from the CPS pin. By the way, we're experimenting with se2431l, but we're using it for our rfa1 based motes, here are the modified tinyos tree for the amplifier, but I guess this doesn't give you any new information: https://github.com/mmaroti/tinyos/tree/radioAmp The important stuff is in the tos/chips/se2431l and tos/chip/atm128rfa1/radio/RFA1DriverLayerP.nc
Andris On Sun, Sep 30, 2012 at 11:51 AM, Ugo Colesanti <[email protected]> wrote: > Thank you, > I will check Iris mote tomorrow and see whether it is as high as zigbit amp > or not. > I found the following sentence on the REB231FE2 application note (radio > extender board always from atmel and with the same frontend as the zigbit > amp): > > "The SE2431L operating mode is determined by control lines CTX, CPS and CSD. > The default configuration connects CPS pin to EVDD via R31. This means that > in receive mode the LNA will always be enabled for maximum sensitivity. > Enabling low power RX bypass mode requires removing R31 and R32 populated > with 0R resistor" > > Maybe they made something similar with the zigbit amp? It sounds strange, > but never knows... > > Ugo > > > On 09/29/2012 06:46 PM, András Bíró wrote: >> >> Hi Ugo, >> >> Sorry, I took that picture a long time ago, I don't remember the avg. >> The measurement wasn't quite accurate eighter, I just wanted to show >> you what to except from an atmega128/1281 mote. >> >> Andris >> >> On Sat, Sep 29, 2012 at 11:19 AM, Ugo Colesanti >> <[email protected]> wrote: >>> >>> Hi, >>> I've used a cheap multimeter, I can check with my oscilloscope if I get >>> these spikes too. BTW, with the multimeter I have an avg value that shows >>> 1-2uA with telosb and, if I remember well, with Iris too (but I should >>> recheck next monday). In any case it was not as high as the zigbit amp >>> that >>> steadily shows 160uA. Just to know, in your figure, what is the avg >>> current? >>> >>> Ugo >>> >>> >>> >>> On 09/28/2012 10:01 PM, András Bíró wrote: >>>> >>>> Hi Guys, >>>> >>>> 160uA doesn't seems so much. I don't think it's the amplifier, I >>>> suspect the timer stack is running on your mote. As far as I remember >>>> the timer stack is always running on atmega128(1) based motes, and it >>>> consumes quite a lot of power (it's only an 8 bit counter, and the >>>> overflow interrupt is inaccurate, so the MCU wakes up for resetting >>>> the counter about 5 times in a second) >>>> How do you measure the power consumption? You can clearly see the >>>> spikes on an oscilloscope, for example this is the power consumption >>>> of the timer stack on iris: >>>> https://www.dropbox.com/s/cmidjtple52jvv5/uresj.png >>>> >>>> Andris >>>> >>>> On Tue, Sep 25, 2012 at 6:05 PM, Ugo Colesanti >>>> <[email protected]> wrote: >>>>> >>>>> Thanks Janos, >>>>> I already tried to change this pin but the power consumption increases >>>>> to approx. 5.5mA (I suppose because the amplifier is activated). >>>>> In particular here is what I made: >>>>> 1) I first modified MotePlatformP adding: >>>>> DDRC = 0x02 ; PORTC = 0x02 ; -> power consumption 5.5mA >>>>> DDRC = 0x02 ; PORTC = 0x00 ; -> power consumption 160uA >>>>> 2) Then I restored the MotePlatformP component and modified NullC by >>>>> adding the same lines in Boot.booted with same results. >>>>> 3) I replace those lines with GeneralO interface (it should be the >>>>> same, >>>>> but just to be sure) and adding GeneralIO.makeOutput; GeneralIO.set() / >>>>> clr() , again, with same results. >>>>> No luck :( >>>>> >>>>> Ugo >>>>> >>>>> On 09/25/2012 04:55 PM, Janos Sallai wrote: >>>>>> >>>>>> Ugo: >>>>>> >>>>>> I think I had the same issue at one point. >>>>>> >>>>>> Try setting HplAtm128GeneralIOC.PortC1 to high. Make sure that you set >>>>>> it as an output pin first. >>>>>> >>>>>> Janos >>>>>> >>>>>> On Tue, Sep 25, 2012 at 3:58 AM, Ugo Colesanti >>>>>> <[email protected]> wrote: >>>>>>> >>>>>>> Hi all, >>>>>>> I'm using two zigbit amp with tinyos based on the latest eth code >>>>>>> found >>>>>>> on the old tinyos-contrib cvs. Everything seems to work fine (I >>>>>>> receive >>>>>>> and send packets even in LPL) except for one test that I'm used to >>>>>>> perform on new platforms: I burned the Null application (including >>>>>>> the >>>>>>> ActiveMessageC component as it should be done for IRIS platforms) and >>>>>>> measured the current draw of the node. Based on the datasheet, the >>>>>>> expected current draw should be lower than 6uA but in my case I'm not >>>>>>> able to reach values below 160uA. I forced MCUSleep to return >>>>>>> ATM128_POWER_DOWN as lowest state and disabled the amplifier pulling >>>>>>> low >>>>>>> the PC1 port of the cpu but nothing changed. >>>>>>> I noticed that the CPS pin of the SE2413l (the front-end) stays high >>>>>>> which avoids the fron-end to go in sleep mode and I think that this >>>>>>> is >>>>>>> the main reason of the unexpected power consumption. Unfortunately >>>>>>> Atmel >>>>>>> does not give the schematics of the ZigBit Amp and I have not been >>>>>>> able >>>>>>> to pull this pin low (nor I've been able to understand how bitcloud >>>>>>> manages it). >>>>>>> Does anybody have worked on it and could help me? >>>>>>> >>>>>>> Ugo >>>>>>> >>>>>>> p.s. Janos: I've seen an old post where you say that you've worked on >>>>>>> that module, have you experienced the same issue? >>>>>>> >>>>>>> -- >>>>>>> Ugo Maria Colesanti >>>>>>> Dipartimento di Ingegneria Informatica, Automatica e Gestionale >>>>>>> "Antonio Ruberti" >>>>>>> Sapienza Universita' di Roma >>>>>>> Via Ariosto 25, I floor, room B112 >>>>>>> 00185, Rome >>>>>>> >>>>>>> >>>>>>> http://wiserver.dis.uniroma1.it/cms/index.php/contacts/13-postdoc/4-ugo-colesanti >>>>>>> Phone: +39 06 77274119 >>>>>>> Fax: +39 06 77274002 >>>>>>> >>>>>>> _______________________________________________ >>>>>>> Tinyos-help mailing list >>>>>>> [email protected] >>>>>>> >>>>>>> >>>>>>> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help >>>>>>> >>>>> -- >>>>> Ugo Maria Colesanti >>>>> Dipartimento di Ingegneria Informatica, Automatica e Gestionale >>>>> "Antonio >>>>> Ruberti" >>>>> Sapienza Universita' di Roma >>>>> Via Ariosto 25, I floor, room B112 >>>>> 00185, Rome >>>>> >>>>> >>>>> http://wiserver.dis.uniroma1.it/cms/index.php/contacts/13-postdoc/4-ugo-colesanti >>>>> Phone: +39 06 77274119 >>>>> Fax: +39 06 77274002 >>>>> >>>>> _______________________________________________ >>>>> Tinyos-help mailing list >>>>> [email protected] >>>>> >>>>> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help >>> >>> >>> >>> -- >>> Ugo Maria Colesanti >>> Dipartimento di Ingegneria Informatica, Automatica e Gestionale "Antonio >>> Ruberti" >>> Sapienza Universita' di Roma >>> Via Ariosto 25, I floor, room B112 >>> 00185, Rome >>> >>> http://wiserver.dis.uniroma1.it/cms/index.php/contacts/13-postdoc/4-ugo-colesanti >>> Phone: +39 06 77274119 >>> Fax: +39 06 77274002 >>> > > > -- > Ugo Maria Colesanti > Dipartimento di Ingegneria Informatica, Automatica e Gestionale "Antonio > Ruberti" > Sapienza Universita' di Roma > Via Ariosto 25, I floor, room B112 > 00185, Rome > http://wiserver.dis.uniroma1.it/cms/index.php/contacts/13-postdoc/4-ugo-colesanti > Phone: +39 06 77274119 > Fax: +39 06 77274002 > _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
