Hi, currently I'm trying to write a clock driver for my selfmade USB based DCF77 receiver. Communication works trough the "usblib", there is no kernel driver involved. But now I'm in trouble how to forward the time to the NTPD. There are various DCF77 drivers in the ntp source tree. But they all are based on a serial device. I have no. I have to poll my USB device two times a second. My clock device generates a data set with a reference second pulse - synced to/by the DCF signal - and also provides the raw bit information sent via DCF in 59 bits for the next minute (one bit per second like the DCF77 signal does, but already filtered and converted to binary data). Is there a way to use anything from the libparse/ directory to let it decode the DCF bit stream, but _not_ registering and using a serial device?
Another question: How does the time flow works? I read the "refclock_hopfpci.c" clock driver, as it also does not use a serial device. It does something in "hopfpci_poll" (struct refclock.clock_poll). But the comment of this function (and in all the other implementations I found) is: "called by the transmit procedure". ????? Will this function be called periodically (by ntp)? Or does the clock driver trigger something to let it be called? Any hints are welcome. Juergen _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
