I would like to enable the internal RTC of STM32F103 MCU. RTC works fine with HSE clock source. But when I select LSE as clock source, RTC stops working. It is necessary to use LSE and VBAT because the real time should be saved after possible shut down of MCU.
I use HAL libraries and the settings are made using CubeMX software. I found some code in Standard Peripheral Library. The code works, so the hardware does not have any special problem.
Thanks in advance.