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RTC Alarm B not trigger some time

Question asked by vasta.paolo.001 on Apr 10, 2017

Hello every one, I've problem with STM32L071 rtc alarm B.

I used Alarm A for 2 alarm per day, and work fine, and Alarm B for a periodic interrupt of 5 minutes.

Random happen that Alarm B not trigger and MCU not go out from stop mode until Alarm A will not triggered.

The alarm appear to be setted in right mode but for some reason interrupt not fire. Can you help me??

I use LSE and alarm time is after the clock in the instant of setting..

 

thank you

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