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3 years, 8 months ago.
RTC doesnt work after microcontroller wakes up from low power mode
I am using this function to set time set_time(ui32UTC);
I check and it works fine with this function: time_t seconds = time(NULL);
Then, i am using these two commands to put my controller in low power mode (Standby Mode):
HAL_RTCEx_SetWakeUpTimer_IT(sCfgData.RtcHandle, 5, RTC_WAKEUPCLOCK_CK_SPRE_16BITS);
/ Put MCU in Standby Mode*/ HAL_PWR_EnterSTANDBYMode();
where 1st function wakes up microcontroller after every 5 seconds.
Now the problem is that when i use these command after wakeup again time_t seconds = time(NULL); the seconds is a large negative value, what changes I need to do that it keeps the time even in standby mode.