How to set RTC calendar for STM32F105RB.

WPong.1 · ‎2022-08-19

How to set RTC calendar for STM32F105RB. I see on reference manual but no RTC register that can set calendar.

Peter BENSCH · ‎2022-08-19

The STM32F105 does not yet have dedicated registers for date or time and handles everything in binary in the RTC_CNTH and RTC_CNTL registers.

Regards

/Peter

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Peter BENSCH · ‎2022-08-19

The STM32F105 does not yet have dedicated registers for date or time and handles everything in binary in the RTC_CNTH and RTC_CNTL registers.

Regards

/Peter

In order to give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

waclawek.jan · ‎2022-08-19

AN2821 would be the material to point at, but the calendar description there is utter garbage reflecting the SPL implementation (which is the same garbage) without making a reference to it.

AN2821 also fails to discuss the atomicity issues when reading out a 32-bit counter through two 16-bit registers.

I wonder if Cube is already written to use the normal epoch-time and <time.h> facilities, or retains this "counting days" nonsense... [EDIT] yep, I checked, still the day-counting... and no provision for the nonatomic CNT read either...congrats, ST [/EDIT]

JW