[time-nuts] GPSDO standard interface?

Mark Sims holrum at hotmail.com
Thu Jun 26 13:01:29 EDT 2014


Yes I have...  I have built several sensor type boards that use an ATMEL chip as the processor.  They output data in a TSIP packet format that tricked up versions of Lady Heather can control and monitor.   The most complicated one is probably a LED/Battery analyzer device that measures  voltages,  currents,  intensities,  color spectrum, etc and can PWM a 90 amp power FET.
The TSIP requirements for a GPSDO can be fairly simple.   Look in the heathgps.cpp file in the Lady Heather source code to see what messages are important.  You don't need to implement all (or even most) of them.  The more you implement,  the better Lady Heather can control it.  Lady Heather basically wants to see the primary and secondary timing messages every second.  It uses those messages to trigger requests for other info/status messages...  a different message each second.
So, start with outputting the primary and secondary timing messages every second.    You probably also want to output the lat/lon/alt message.  Then add support for other messages that you want to see/control.
As far as Windows is concerned...  Lady Heather is open source.  Feel free to port it to Linux, etc...  it should not be too difficult... but many people have said that they would do so,  but so far nobody has.  If you want to do so,  I can send you the code that I have for version 4.0.  It has some changes to the plotting code and TSIP parser that make it easier to tweak for different data logging applications (such has my LED analyzer). 

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That sounds good but have you figured out how to implement this? 		 	   		  


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