STM32F3 Auto-Wakeup problem

[lrosadev]

Posted on May 11, 2015 at 18:14

Hi All,

I'm studying STM32F3 Low power modes and I need to go in standby mode periodically and wake-up via RTC after n seconds (Run->standby->Run ...).I set the RTC, the wakeup-Timer-IT, I do something in main loop and after these actions I call the standby mode. The system goes in standby and after n seconds, wakeup itself but code doesn't seems to run correctly (it look to be freeze)I feel that there is a miss any flag to be reset.For a moment I left auto-wakeup and I try to wakeup with wakeup-pin 1. System works perfectly  Regards  #rtc #stm32 #autowakeup

[waclawek.jan]

Posted on May 12, 2015 at 08:55

You might want to read back the RTC registers and check if they are really set as you wanted them.

Do you read time then date? JW

[lrosadev]

Posted on May 12, 2015 at 09:34

Thank you for reply.

By reading ''seconds'' from RTC without enter in standby mode, registers are well configured. After standby, RTC seem to be not configured as aspect. I can't use debugger after standby because I lost connection. Now I attach some code (main and RTC_init functions)in order to make my question clearer. ________________ Attachments : standby-test.c : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006I0pV&d=%2Fa%2F0X0000000be6%2FzCRCQpvFswrK6pEkXBg5CdFqItirionPgk7pl9Gth.k&asPdf=false