RTC issue when time goes from 23:59:59 to 00:00:00

parthkumar_patel · ‎2025-12-08

Hello,

when my rtc time goes to 23:59:59 to 00:00:00 then my program while loop is slow
ex. some led toggle with 500ms toggle time is incress X2
so what is issue?

Saket_Om · ‎2025-12-08

Hello @parthkumar_patel

Could you please share your code.

Did you measure the toggle time with oscilloscope ?

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Saket_Om

TDK · ‎2025-12-08

HAL_Delay doesn’t use RTC. The cause has the be something else in your code. You’ll need to share more to diagnose the issue. Look for an interrupt which may be executing then.

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Andrew Neil · ‎2025-12-08

Welcome to the forum.

As others have said, you need to provide more information.

Please see:

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