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I have LPC2132 based board with DS3231 RTC. The system is master clock which supports the GMT, IST, UTC time format. It is also connected to GPS which sends in UTC mode. At present, I have own functions to support the conversions in user selected mode from others. Does it possible to use lib function to do the same? I can read the RTC every second can fill the local registers if needed. My aim to use the lib function to keep my implementation simple and clean and hide the programming.
"I want to know, how and where to update the time/date structure so variables are updated"
Did you somehow miss this part of my previous post:
"You will, of course, have to study the documentation for the particular library to find out how to use it..."