Posted on July 21, 2015 at 21:18Hi,
I am using Cube MX to generate the RTC code.
It is working perfectly fine, the time is counted correctly. But every time I turn off the device, the time and date are set back to 0.
I found the problem in the Init function. Every time the RTC is initialized, the time and date are set to zero again.
I solved the problem just by commenting those lines, but I am wondering why cube generates such code! Once that the code is not supposed to be edited, every time I generate a new version I must remember to go there and comment those lines. It is weird. Am I doing something wrong?
/* RTC init function */
void MX_RTC_Init(void)
{
RTC_TimeTypeDef sTime;
RTC_DateTypeDef sDate;
RTC_AlarmTypeDef sAlarm;
/**Initialize RTC and set the Time and Date
*/
hrtc.Instance = RTC;
hrtc.Init.HourFormat = RTC_HOURFORMAT_24;
hrtc.Init.AsynchPrediv = 127;
hrtc.Init.SynchPrediv = 255;
hrtc.Init.OutPut = RTC_OUTPUT_DISABLE;
hrtc.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
hrtc.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
HAL_RTC_Init(&hrtc);
// Manually commented
//sTime.Hours = 0;
//sTime.Minutes = 0;
//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);
// Manually commented
//sDate.WeekDay = RTC_WEEKDAY_MONDAY;
//sDate.Month = RTC_MONTH_JANUARY;
//sDate.Date = 1;
//sDate.Year = 0;
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);
}
