STM32L053-Nucleo board's RTC not running.

[salman2]

Posted on August 25, 2015 at 06:52

Hello,

I have implemented RTC on STM32l053-Nucleo using CubeMX and CubeL0 HAL libraries. I set and get the time and date in RTC using HAL functions but the RTC is not running, I am getting the same time and date I have set. The crystal oscillator connected to RTC as showed in CubeMX is LSI. My IDE is Keil MDK-5. I have posted my RTC initialization function and main function below (main.c is attached). /****************************** RTC init function **********************/ void MX_RTC_Init(void) {     /**Initialize RTC and set the Time and Date     */   hrtc.Instance = RTC;   hrtc.Init.HourFormat = RTC_HOURFORMAT_12;   hrtc.Init.AsynchPrediv= 127;   hrtc.Init.SynchPrediv= 255;   hrtc.Init.OutPut = RTC_OUTPUT_DISABLE;   hrtc.Init.OutPutRemap = RTC_OUTPUT_REMAP_PC13;   hrtc.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;   hrtc.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;   HAL_RTC_Init(&hrtc); } **********************MAIN FUNCTION******************** int main(void) {   /* MCU Configuration----------------------------------------------------------*/   /* Reset of all peripherals, Initializes the Flash interface and the Systick. */   HAL_Init();   /* Configure the system clock */   SystemClock_Config();   /* Initialize all configured peripherals */   MX_GPIO_Init();   MX_RTC_Init();   MX_USART2_UART_Init(); /***********************RTC*********************/     RTC_TimeTypeDef sTime;   RTC_DateTypeDef sDate;   RTC_AlarmTypeDef sAlarm;                 sTime.Hours = 9;   sTime.Minutes = 30;   sTime.Seconds = 0;   sTime.SubSeconds = 0;   sTime.TimeFormat = RTC_HOURFORMAT12_AM;   sTime.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;   sTime.StoreOperation = RTC_STOREOPERATION_RESET;   HAL_RTC_SetTime(&hrtc, &sTime, FORMAT_BCD);   sDate.WeekDay = RTC_WEEKDAY_MONDAY;   sDate.Month = RTC_MONTH_AUGUST;   sDate.Date = 24;   sDate.Year = 15;   HAL_RTC_SetDate(&hrtc, &sDate, FORMAT_BCD);     /**Enable the Alarm A     */   sAlarm.AlarmTime.Hours = 0;   sAlarm.AlarmTime.Minutes = 0;   sAlarm.AlarmTime.Seconds = 0;   sAlarm.AlarmTime.SubSeconds = 0;   sAlarm.AlarmTime.TimeFormat = RTC_HOURFORMAT12_AM;   sAlarm.AlarmTime.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;   sAlarm.AlarmTime.StoreOperation = RTC_STOREOPERATION_RESET;   sAlarm.AlarmMask = RTC_ALARMMASK_NONE;   sAlarm.AlarmSubSecondMask = RTC_ALARMSUBSECONDMASK_ALL;   sAlarm.AlarmDateWeekDaySel = RTC_ALARMDATEWEEKDAYSEL_DATE;   sAlarm.AlarmDateWeekDay = 1;   sAlarm.Alarm = RTC_ALARM_A;   HAL_RTC_SetAlarm(&hrtc, &sAlarm, FORMAT_BCD);          RTC_TimeTypeDef gTime;     char str[100];        while (1)   {         HAL_RTC_GetTime(&hrtc, &gTime, FORMAT_BCD);                  sprintf(str, ''Time -> %d:%d:%d (sub seconds: %d)\n'',sTime.Hours, sTime.Minutes, sTime.Seconds, sTime.SubSeconds);         HAL_UART_Transmit(&huart2, str, 100, 5000);         HAL_Delay(1000);   } } #stm32l053 #rtc #nucleo #hal

[Nesrine M_O]

Posted on August 25, 2015 at 10:55

Hi khaja.salman,

I'd highly recommend you to start from RTC examples under STM32Cube L0 package : STM32Cube_FW_L0_V1.1.0\Projects\STM32L053R8-Nucleo\Examples\RTC-Syrine-