[time-nuts] Ublox timepulse

[jimlux]

On 2/4/20 2:23 AM, Christophe Huygens wrote:
> Hi,
> 
> 
> I need a sync pulse every minute at start of minute, aligned with UTC time (let's not discuss what UTC time really is :-)). Any quick assessment whether uBlox TIMEPULSE out can do this?
> 
> 
> It does not seem to be a problem to generate a pulse every minute based on UBX-CFG-TP5, but how can this be aligned with a minute. Is the only solution to query time eg every top of second to see if minute has started?
> 
> 
> I can parse this out of the GPS data even by polling but this seems ... not elegant.
> 
> 
> A few 10s of millsecond after exact start of minute would be fine. Thoughts? Target CPU is very limited, say ATmega328. Or none at all if it can be avoided.
> 


I think parsing the message might be the easiest way, unless they happen 
to have provided it as a feature in the output pulse configuration. The 
parsing code would trivially fit in a tiny CPU - you're basically 
looking for zero in the right place.