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Nucleo-F767ZI : RTC is not working

Question asked by bustico.alexandre on Jul 18, 2016
Latest reply on Aug 29, 2016 by bustico.alexandre

Just executing STM32Cube_FW_F7_V1.4.0/Projects/STM32F767ZI-Nucleo/Examples/RTC/RTC_Calendar, the RTC never initialise.

The function  RTC_EnterInitMode return an error because
RTC_ISR_INITF bit never raise.

We use RTC on our projects on F4 and F74x without any trouble, the problem is only with F767. (exact same program run fine with nucleo F746)

I have also tried to use RTC with the Chibios RTOS, and i have the same problem : RTC_ISR_INITF bit never raise.

I have tried to connect RTC to LSE and LSI, with no success

I have check the F767 errata, but there is nothing about RTC misbehaviour.

Any insight to help me to resolve this problem ?