Hi Uwe, Hi Richard, thank you for your help.
I' am using the FOX board together with a carrier board which have an RS232 signal converter, so the RX signal is inverted. Additionally I' am feeding the Sure DFC77 receiver DTR with -12V and RTS with +12V directly from an DC-DC converter. The LED on the Sure DCF receiver is flashing with ~1Hz, so it seems to receive the DFC signal from Mainflingen correctly. I do not know much of the receiver Hardware since it is proprietary and not well documented, I only know that it receives the raw serial signal with 50 baud. What's about the pulses you are talking about 0.1 s and 0.2 s? Have I to concern about the RAW format? Is there a good documentation source about the DCF77 pulses sent by Mainflingen and about the RAW DCF receivers on tty's in general? Many thanks, Torsten Uwe Wrote: >Hi Torsten, >OK, i have had a look at the FOX Board docs. > >the serial line ttyS0 is TTL level IO ( 3.3V, 5V tolerant) >on the break out header. >Now if you connect your RS232 Level Signals to this >signal sense is inverted (AND you may ruin the inputs) uwe Torsten Krieger wrote: > Hi folks, > > I have a problem with NTP server version 4.2.2p3 and my embedded Linux > system FOX Board. I'am using a raw dcf77 receiver from Sure, the receiver is > working fine with my Linux PC but not with my embedded system. I found that > parity check is disable on the Linux PC but not on my embedded system, so I > have also disabled the parity check on the Fox Board, which than results to > the following ERRORS seen in the log file: > > ntpd[83]: parse: convert_rawdcf: parity check FAILED for > "-###----#--#--#-----S-------P-2----P-2--12-241-4-1---8---8p" unlurk. is that one of the receivers were the serial line receives the raw puls with ~50baud and reads the 0.1s (L) pulse as 'x' and the 0.2s (H) pulse as 'p' or there abouts? if yes: is your line sense ok? i.e. is there a (inverting) rs232 receiver in front of RXD or not. (where) Have you disabled parity check inside ntpd? > > Any idea what is going wrong! > > Many thanks in advanced, > Torsten > _______________________________________________ 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
