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How to re-fetch the RTC value after power restored

meghasb
Senior

‎2023-06-19 2:30 AM

Hi all

I working on the RTC on the STM32U585 with battery backup, after the date/time been set and running i want to re-fetch these values once the device restores the main power or happens even after reset (with main power), As i have a batterybackup, i no need to set the date and time again after reset of the controller but it keeps the same date and time(which is running on RTC). how is this done?

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1 REPLY 1
waclawek.jan
Super User

‎2023-06-19 3:22 AM

Set RCC_APB3ENR.RTCAPBEN, and after that, you can read out RTC_TR and RTC_DR (in that order).

Read Reading the calendar subchapter of RTC chapter in RM.

JW

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