Hi Janos I have read the following email, and that technique could be usefull for my work, so I would like to have access to that code, where can I find it?
Basically, I would like to measure the time in scenarios where the processor could be in sleep mode, with more precision than the 32khz cristal enables. Thanks, and Regards, André ----- Original Message ----- From: "Miklos Maroti" <[email protected]> To: "Christian Renner" <[email protected]> Cc: "Janos Sallai" <[email protected]>; <[email protected]> Sent: Friday, July 08, 2011 8:54 AM Subject: Re: [Tinyos-help] measuring time in microseonds Hi Christian, Janos Sallay has written a combined timer that uses the 32 khz crystal and the MCU to get a fine granularity timer. He has done that for the MSP430 platform, but I am sure it works with some modification on ATMEGAs. Best, Miklos On Thu, Jul 7, 2011 at 6:01 PM, Christian Renner <[email protected]> wrote: > Hi everybody, > > I was trying to measure time deltas in microseconds (IRIS platform) > using the component LocalTimeMicroC. Unfortunately, the component uses > Timer1, which is not running when the MCU is sleeping. What I thus get > is the local time in microseconds (actually 0.9-something of that time, > for the MCU is running at only 7.37 Mhz) minus the sleeping time of the > processor. In my case, preventing the MCU from sleeping is no option. > > To cut a long story short: Is there any way to realize a (near-to) > microsecond 32bit counter/time source while not preventing the MCU from > entering a sleep state? I'd be happy about any hint or comment. > > > Best > Christian > > -- > __Christian_Renner________________________________________________________ > Hamburg University of Technology [email protected] > Institute of Telematics (E-17) Tel.: (+49) 40 42878-3746 > Schwarzenbergstrasse 95 Fax: (+49) 40 42878-2581 > 21073 Hamburg, Germany http://www.ti5.tu-harburg.de/staff/renner > _______________________________________________ > Tinyos-help mailing list > [email protected] > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
