This is merely a historical archive of years 2008-2021, before the migration to mailman3.
A maintained and still updated list archive can be found at https://lists.osmocom.org/hyperkitty/list/UmTRX@lists.osmocom.org/.
Sylvain Munaut 246tnt at gmail.comHi, > 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