Difficult to understand why problems can sometimes happen in RT-THREAD
In my compilation on any version of the O.S. using STM32F417 all went fine.

define BSP_USING_ONCHIP_RTC

define RT_USING_RTC

deleted the WEAK in source file and changed to __weak
No alarm set

At leats I have no such problem, but have others.
Any time I power the board which has a tiny onboard battery all is fine. Time is not lost but only after weeks of power down of course.

msh />cal

Time: 21:39:02
Date: Fri. 16 February 2024

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