Hi Uwe, I made a small c program which reads the serial port /dev/refclock-0 character by character, ntpd switched off. Shall I see one character by second (second = 1/60 minute) 0xf0 for low bit and 0x00 for high bit? If this should be the case then something went wrong with my serial interface.
Ciao, Torsten Uwe wrote: >http://www.eecis.udel.edu/~mills/ntp/dcf77.html > >The DCF Signals is 1 pulse every 1 second. the 59th pulse is omitted to >mark the minute transition. >AAdditonal information is coded into the pulselength of the second pulses. >0.1 sec for a low bit, 0.2sec for a high bit. > >on a 50Baud (0.02s/bit) serial line with inverted sense this is received as > >HHHHLLLLLHHHHHHHH S=StartBit, s=StopBit(s) >____S01234567s____ 0xf0 for a low bit > >and > >HHHHLLLLLLLLLHHH >____S01234567s____ 0x00 for a high bit > >uwe _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
