In my project, I use the RTC with LSI and calibrate it by adjusting the prescaler at regular intervals (e.g., once per day). This method works well on STM32H7, but it doesn't work on STM32H5.
On STM32H5, after changing the prescaler, the RTC either stops or doesn't keep correct time.
This code works perfectly for me on the STM32H7. However, when I try the same approach on the STM32H5, it doesn't work. After a lot of searching, I found that some people say you cannot change the RTC prescaler on the STM32H5 due to security features. It seems the hardware keeps returning the same prescaler value as before, even after trying to change it.
