Standby mode and rtc with STM32L

[juergen23]

Posted on September 05, 2014 at 13:07

Hi,

i'm using the STM32L151 for a little project.

I use an external crystal for the rtc to show time and date in a display. If battery is low i want to save battery power, so in this case i activate the standby mode.

Problem: After wakeup all works fine, but the clock has lost the current date and time. In stop mode the controller is not making a reset to wakeup, so the clock is correct.

Is it possible to easily recover the date and time in case of a wakeup from standby?

Code is similar to this implementation: http://www.coocox.org/Show_Exam.php?id=365&comname=PWR

#rtc #stm32 #standby #stm32l

[sergio23]

Posted on April 15, 2016 at 12:10

Hi,

I have a similar problem. Did you get fix up?

Can you tell me how did you solve it?

Thank you

Carmen

[Walid FTITI_O]

Posted on April 15, 2016 at 18:44

Hi JR7777,

Please, refer to this

https://my.st.com/public/STe2ecommunities/mcu/Lists/STM32Java/Flat.aspx?RootFolder=https://my.st.com/public/STe2ecommunities/mcu/Lists/STM32Java/RTC%20Problems%20when%20waking%20up%20from%20StandBy%20mode&FolderCTID=0x01200200770978C69A1141439FE559EB459D758000F9A0E3A95BA69146A17C2E80209ADC21&currentviews=2

.

-Hannibal-