how to set RTC alarm for all day in stm32f407vgt?

[Vinay1]

mcu: " STM32F407VGT Discovery Board - DICS1 "

application: RTC ALARM

i am trying to set the RTC alarm for every 15 minutes in all the day. in each RTCAlarmcallback function i am setting the RTC alarm again with sTime.Minutes + 15.

if sTime.Minutes is greter than 45, i am setting RTC alarm minutes [i.e, sRtcAlarmTime->Minutes] to 0

is i am doing correct?

pls guide me to do this.

this bellow function which is i am using:

void set_Alarm_A (RTC_TimeTypeDef *sRtcAlarmTime, RTC_DateTypeDef *sRtcAlarmDate)

{

RTC_AlarmTypeDef sAlarm = {0};

/*

* Set the Alarm A  

*/

  sAlarm.AlarmTime.Hours = sRtcAlarmTime->Hours;

  sAlarm.AlarmTime.Minutes = sRtcAlarmTime->Minutes;

  sAlarm.AlarmTime.Seconds = sRtcAlarmTime->Seconds;

  sAlarm.AlarmTime.SubSeconds = sRtcAlarmTime->SubSeconds;

  sAlarm.AlarmTime.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;

  sAlarm.AlarmTime.StoreOperation = RTC_STOREOPERATION_RESET;

  sAlarm.AlarmMask = RTC_ALARMMASK_DATEWEEKDAY | RTC_ALARMMASK_HOURS | RTC_ALARMMASK_SECONDS;

  sAlarm.AlarmSubSecondMask = RTC_ALARMSUBSECONDMASK_NONE;

  sAlarm.AlarmDateWeekDaySel = RTC_ALARMDATEWEEKDAYSEL_DATE;

  sAlarm.AlarmDateWeekDay = sRtcAlarmDate->Date;

  sAlarm.Alarm = RTC_ALARM_A;

  if (HAL_RTC_SetAlarm_IT(&hrtc, &sAlarm, RTC_FORMAT_BIN) != HAL_OK)

  {

   Error_Handler();

  }

}

is this correct?

[waclawek.jan]

> if sTime.Minutes is greter than 45, i am setting RTC alarm minutes [i.e, sRtcAlarmTime->Minutes] to 0

And if it's equal to 45?

JW

[Vinay1]

if its equals to 45 min i will set RTC Alarm Minutes to 0

[Vinay1]

 > sAlarm.AlarmMask = RTC_ALARMMASK_DATEWEEKDAY | RTC_ALARMMASK_HOURS | RTC_ALARMMASK_SECONDS;

what meaning if i use like above?

[waclawek.jan · Accepted solution]

I don't use Cube, but that probably directly converts to RTC_ALRMxR.MSKx bits, see RTC chapter in RM.

In other words, in the above setting, date, hours and seconds are ignored for checking the alarm, i.e. only minutes are checked.

JW

[Vinay1]

thank you

[Tesla DeLorean]

Assume you need to advance hours when you overflow minutes.​