Timer Sync to GPS pulse

[molgu]

Posted on March 03, 2009 at 09:46

Timer Sync to GPS pulse

Posted on May 17, 2011 at 09:57

Hello,

I'm using the STR-9 processor and have a requirement to ''sync'' one of the internal timers to an external GPS 1PPS input. Any suggestions on how best to accomplish this task using the STR-9 micro?

Thanks :D

[hoyen]

Posted on May 17, 2011 at 09:57

Hi,

According to the lack of details in your 1st post, maybe you could describe a little bit more, What do you mean by ''sync on GPS signal'' (I never worked with GPS signal).

Do you want to start to count a duration on a edge, or count the number of pulse or somethings else.

Keep me in touch.

Regards.

Damien hoyen

Posted on May 17, 2011 at 09:57

Hi Damien,

Thanks for your reply.

We have a GPS module receiving several satellites and this module outputs a precise 1PPS signal as a very accurate time sync pulse at about 50ms. What I need to do is sync with this 1PPS to generate a 1 minute Frame signal and within that Frame, allocate 2250 slots at 26.67ms each slot. I will then output a 37.49Hz square wave timing signal for other circuits. This project is a TDMA (time division multiple access) signaling system.

Thanks for any suggestions,

Alan :D