Hi, It would be great if I could have a look at your code. Do you do anything other than call start() and stop()? I've read other people on the boards who have had problems restarting the MicaZ radio after stopping it.
Thanks, Mike -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Ravi Prasad Sent: 05 February 2007 05:38 To: [email protected] Subject: Re: [Tinyos-help] Suspending the MicaZ radio (CC2420) Hi, I am not aware of the problem of adc data corruption on Micaz. But I have succesfully used manual (means application layer controlled) radio turn On/Off in my applications. My application made radio On for 200ms every 10 sec for saving power. (as micaz-CC2420 didnt have low power implementation in 1.1.14. And still I think low power micaz-cc2420 is not stabilized in tinyos2.0 also) Any way, if your need matches this, I can give you the code. BTW I used TinyOS1.1.14, which I think is not much diferent from 1.1.15 in terms of Radio. Regards --- Philip Levis <[EMAIL PROTECTED]> wrote: > On Feb 2, 2007, at 8:40 AM, Michael Collett wrote: > > > > > Hi, > > > > Platform: MicaZ > > OS: TinyOS 1.15 (I think, definitely not 2.0) > > Application: Adapted from OscilloscopeRF > > > > I've noticed that during readings of the ADC, > radio activity > > (reception or transmission) can cause the data to > change > > dramatically (probably due to the drain on the > power supply for the > > ADC reference voltage). I've tried calling > ComControl.stop() and > > CommControl.start() either side of taking data, > but the radio > > doesn't seem to start back up again. > > > > Is there a way to suspend the radio during a > measurement to prevent > > the data being affected. I know that I could just > set a lower > > sample rate and then have careful timing to stop > them overlapping, > > but I would like to find a more rigorous way of > solving the problem. > > Geoffrey Werner-Allen (Harvard) noted this issue in > his recent paper > in OSDI on a Volcano deployment. The paper says they > fixed the > problem, so he might have code for this purpose. > > Phil > _______________________________________________ > Tinyos-help mailing list > [email protected] > https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > ____________________________________________________________________________________ Sucker-punch spam with award-winning protection. Try the free Yahoo! Mail Beta. http://advision.webevents.yahoo.com/mailbeta/features_spam.html _______________________________________________ Tinyos-help mailing list [email protected] https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help ------------------------------------------------------------------- This e-mail and any attachments may contain confidential and/or privileged material; it is for the intended addressee(s) only. If you are not a named addressee, you must not use, retain or disclose such information. NPL Management Ltd cannot guarantee that the e-mail or any attachments are free from viruses. NPL Management Ltd. Registered in England and Wales. No: 2937881 Registered Office: Serco House, 16 Bartley Wood Business Park, Hook, Hampshire, United Kingdom RG27 9UY ------------------------------------------------------------------- _______________________________________________ Tinyos-help mailing list [email protected] https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
