Posted on August 25, 2015 at 06:52Hello,
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
