On Thu, Sep 17, 2020 at 05:55:28PM +0530, Jairaj Solanki wrote:
> I Tried to parse NMEA from GPS Receiver and the results were as below with
> no time service running in background :

If you use the NMEA, then why do you think the time service matters?

> also with ntp running it looks the same and not converging at all.

Again, why should running NTP make any difference at all?
 
> and this is not converging, Am I missing any configuration?

It is because of this:

    /dev/ptp0 ignoring invalid master time stamp

I think the message is crystal clear.  It says that the SW is ignoring
the time stamp.  How should the servo converge if the time stamp are
being ignored?

> Why is the mater timestamp Invalid even when the GPS Receiver has acquired
> a fix?

The NMEA parsing code is in nmea.c

You can instrument nmea_scan_rmc() to see which test fails.  (Not
every failing test prints a message.)

I guess your sentences lack the checksum on the end?

Thanks,
Richard


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