[ntp:questions] YEA! My Sure Electronics GPS just arrived.

unruh unruh at invalid.ca
Sat Mar 24 03:53:24 UTC 2012


On 2012-03-24, Chris Albertson <albertson.chris at gmail.com> wrote:
> On Fri, Mar 23, 2012 at 4:39 PM, unruh <unruh at invalid.ca> wrote:
>> Sorry, just realised what you meant by "programming"-- change in baud
>> rate, sentence delivery, etc. I use the default ( and use the PPS from
>> the Sure for the actual timing via either the serial port (with
>> pps_ldisc on linux) or with the parallel port and a special program I
>> wrote to handle the parallel interrupt
>
> The Linux PPS code now handles  parallel port.  You don't have to
> write your own.   Also I think the PPS API was a way to add other
> physical devices so there is no need for an ad-hoc solution.     Maybe
> you need to upgrade to latest kernel to get this.

I wrote it about 6 years ago. 

I know it and how it works. I do not know how the pps_parallel works. 


>
> Oh, if the Sure GPS does loose the programming (It would be simple to
> test) you can fit it by placing a battery across the power supply.  I
> used a coin ell holder salvaged from a dead PC for one GPS I have and
> AA cells work too.  But I bet the sure is new enough to use eprom or
> flash.
>
>
> Chris Albertson
> Redondo Beach, California



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