Umesh, You can use the SysTimeStampingC component (contrib/vu/tos/lib/CC2420) to timestamp the reception of a message in microsecond resolution. In the handler of the MicInterrupt.toneDetected() event, you can just call the SysTime.getTime32() command of the SysTimeC component to timestamp the tone detection.
You should, however, keep in mind that SysTimeC and SysTimeStampingC use the processor clock. If the mote sleeps, the clock stops. This means that you can either do microsecond precision timestamping or power saving, but not both at the same time. I assume you want to do acoustic ranging. When you calculate the range, please keep in mind that the resolution of the clock is not exactly one microsecond, but 1/921600s. Good luck, Janos -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of S. Umesh Babu Sent: Saturday, December 03, 2005 12:54 AM To: tinyos-help@Millennium.Berkeley.EDU Subject: [Tinyos-help] How to get timestamps in microseconds for micaz motes Hello, We want to measure time between two events using timestamps in microseconds.(micaz motes) 1) receiving time of a radio packet 2) beep listening,by calling Mic.readToneDetector() command. how can i get the timestamps. thankyou for your assistance warm regards Umesh _______________________________________________ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-hel p _______________________________________________ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
