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STM32F4 RTC problem

Question asked by Stephan Scherer on May 2, 2018



I have a problem. I use a STM32F427 with Keil RTX.

If I start my Programm without a backup battery my Programm runs into a rtos error (stack Overflow) if I want to set the date/time, but at this time the os isn't running.


I use an external 32768 Hz oscillator as LSE clock.


Can anyone give me a hint what I can do to solve this problem?

If I have a battery connected the Programm works fine at the second start, if there is a date/time in the system.


Best regards