In the scheduling system we use we need a simple 32kHz low power counter value.
Exactly like in the stm32F1 family is present.
But in any other family, the RTC registers are replaced by Time and Date registers.
I am able to covert the Time register back to a counter value that overflows every 24 hours and add the number of days.
This way I can get a 32 bit counter value running at 32kHz.
But it is an enourmous hassle and it takes a lot more processing time than needed.
Is there a simple way to get a low power 32kHz counter value, so we can use it for our scheduling?
We aim to disable the HSI/HSE/PLL clocks when no tasks needs to run, but keep de Low power LSE/LSI running to wakeup from stop mode.
We do not need any timestamp values like year month day hour minute second.