I want to create a highly accurate GPS time synchronizer.

[xkamail]

Option 1:

- Use a 10MHz Timepulse signal from the GPS (Ublox M8N) and connect it to the STM32H7.

- The STM32H7 will count the timer from 0 to 999999.

- To determine when the second has passed and the NMEA signal arrives, check the next timer overflow, which will indicate the exact second.

 

Option 2:

- Use a 1Hz Timepulse signal from the GPS and synchronize the time with the same as option 1.

 

I prefer a 10MHz or higher frequency Timepulse signal because I want to use it to trigger the Timer. This will trigger the ADC, ensuring that the ADC aligns with the GPS clock every 1us.

[Sarra.S]

Hello @xkamail, 

I would expect you went with option 1 using a higher frequency, are there any updates or challenges with the timer configuration, ADC alignment,..?