"make sure your RTC timebase is a timer with auto reload. Anything else will give you slight imprecision in the timekeeping."

This just is not the case. We already flogged this horse to death, barbequed it and ate it

OK, let me restate

make your RTC timebase is a timer with auto reload. Anything else will require very careful coding or give you slight imprecision in the timekeeping.


Erik