I’m using an RTC example program from the CUBE F3 (STM32F3Nucleo) download, and it work ok, except I cannot read or write to the RTC backup registers.
The example configures RTC as follows:
When I try to read and write to the backup registers, I cannot read back what I have previously written.
HAL_RTCEx_BKUPWrite(&RtcHandle, RTC_BKP_DR1, 0x32F2);
Even if I precede the read and or write with: