22 Sep
2012
22 Sep
'12
8:43 p.m.
Hi,
Very nice to see the progress UmRTX.
I checked out the git found the GPS 1pps signal was terminated to
FPGA, and wonder how the discipline algorithm was implemented. Someone
would give me a hint or introductory?
thanks in advance.
Regards.
Jerry
22 Sep
22 Sep
9:15 p.m.
Hi,
I checked out the git found the GPS 1pps signal was
terminated to
FPGA, and wonder how the discipline algorithm was implemented. Someone
would give me a hint or introductory?
Simple PID control. Look at the ZPU firmware (soft cpu core inside the FPGA).
We don't need a "time-nut" level of accuracy here so this simple
control works well. Could be improved to handle corner cases though.
Cheers,
Sylvain
4241
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Jerry Giant -
Sylvain Munaut