I'm using STM32IDE with MCU STM32L011F4 and LL libs. Something is wrong with RTC + LSE/LSI. Code is minimum generated by IDE. I set RTC with LSE and code is default generated by IDE, and can't change time/date, it's alwasy zero. But if I change source to LSI everything works. Board is handmade and LPTIM with LSE is working as expected.
Code is below as generated by IDE + lines with time/date check.
static void MX_RTC_Init(void)
{
/* USER CODE BEGIN RTC_Init 0 */
/* USER CODE END RTC_Init 0 */
LL_RTC_InitTypeDef RTC_InitStruct = {0};
LL_RTC_TimeTypeDef RTC_TimeStruct = {0};
LL_RTC_DateTypeDef RTC_DateStruct = {0};
/* Peripheral clock enable */
LL_RCC_EnableRTC();
/* USER CODE BEGIN RTC_Init 1 */
/* USER CODE END RTC_Init 1 */
/** Initialize RTC and set the Time and Date
*/
RTC_InitStruct.HourFormat = LL_RTC_HOURFORMAT_24HOUR;
RTC_InitStruct.AsynchPrescaler = 127;
RTC_InitStruct.SynchPrescaler = 255;
LL_RTC_Init(RTC, &RTC_InitStruct);
/** Initialize RTC and set the Time and Date
*/
RTC_TimeStruct.Hours = 0;
RTC_TimeStruct.Minutes = 0;
RTC_TimeStruct.Seconds = 0;
LL_RTC_TIME_Init(RTC, LL_RTC_FORMAT_BIN, &RTC_TimeStruct);
RTC_DateStruct.WeekDay = LL_RTC_WEEKDAY_MONDAY;
RTC_DateStruct.Month = LL_RTC_MONTH_JANUARY;
RTC_DateStruct.Day = 12;
RTC_DateStruct.Year = 0;
LL_RTC_DATE_Init(RTC, LL_RTC_FORMAT_BIN, &RTC_DateStruct);
/* USER CODE BEGIN RTC_Init 2 */
LL_RTC_WaitForSynchro(RTC);
uint32_t current_time, current_date;
current_time = LL_RTC_TIME_Get(RTC);
current_date = LL_RTC_DATE_Get(RTC);
//compare input and result
while (__LL_RTC_CONVERT_BCD2BIN(__LL_RTC_GET_DAY(current_date)) != RTC_DateStruct.Day)
{
LL_GPIO_TogglePin(ImpulsOUT_GPIO_Port, ImpulsOUT_Pin);
LL_mDelay(300);
}
/* USER CODE END RTC_Init 2 */
}
