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RTC crash on STM32F103

Question asked by brousalis.angelo on Jan 5, 2012
Latest reply on Jan 6, 2012 by brousalis.angelo
Hello to all,

Recently I noticed a strange behavior on STM32F series RTC, I'd like to draw your attention upon. After a hardware failure  (it happened to me many times after an accidental VCC-GND short during board debugging  and some times during EMC testing) the RTC crashes irrecoverably and cannot initialized again even after power cycling. The symptom is that RTC library function RTC_WaitForLastTask() or  RTC_WaitForSynchro() does not return and loop forever. The only cure I have found so far is VBAT cycling during power off. Is there any other way to restart RTC through software without cycling VBAT ?

Thanks in advance,