Posted on May 05, 2014 at 17:04Hi,
I'm trying to config wake up from deep sleep (STOP mode) in STM32F030 for 1350 milli seconds.
I've found a way to wake up in resolution of seconds with the Alarm with the following code:
RTC_TimeTypeDef RTC_TimeStructure;
RTC_AlarmTypeDef RTC_AlarmStructure;
secondsLoad = wakeUpCounter / ONE_SECOND;
// Get current time
RTC_GetTime(RTC_Format_BIN, &RTC_TimeStructure);
// Set the alarm to current time + Xs
RTC_AlarmStructure.RTC_AlarmTime.RTC_H12 = RTC_H12_AM;
RTC_AlarmStructure.RTC_AlarmTime.RTC_Hours = RTC_TimeStructure.RTC_Hours;
RTC_AlarmStructure.RTC_AlarmTime.RTC_Minutes = RTC_TimeStructure.RTC_Minutes;
RTC_AlarmStructure.RTC_AlarmTime.RTC_Seconds = RTC_TimeStructure.RTC_Seconds + secondsLoad;
RTC_AlarmStructure.RTC_AlarmDateWeekDay = 31;
RTC_AlarmStructure.RTC_AlarmDateWeekDaySel = RTC_AlarmDateWeekDaySel_Date;
RTC_AlarmStructure.RTC_AlarmMask = RTC_AlarmMask_DateWeekDay | RTC_AlarmMask_Minutes |
RTC_AlarmMask_Hours;
RTC_SetAlarm(RTC_Format_BIN, RTC_Alarm_A, &RTC_AlarmStructure);
As well I can configure wake up with resolution of sub seconds as following:
if (wakeUpCounter > secondsLoad * ONE_SECOND)
{
// Set AlarmA subseconds and enable SubSec Alarm : generate x interripts per Second
RTC_AlarmSubSecondConfig(RTC_Alarm_A, (wakeUpCounter - secondsLoad * ONE_SECOND), 7);
}
But I don't know how to configure it for 1.350 sec. (or 15.56sec)
Thanks you very much in advance for answer!
Meir
#wakeup #real-time-clock-rtc-alarm #timer #rtc #stm32
