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. Additonal 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
