About MY.2

MY.2 · 2021-09-20

The STM32F030CCT6 is put to Stop mode. It wakes up on getting the RTC ALARM interrupt which is being used as a 4 hour timer. (The wakeup timer of RTC is being used for another purpose hence this work around). On getting the interrupt, the MCU calcul...

MY.2 · 2021-09-20

I am using the LSI oscillator to drive RTC. Thank you for your response. I will look into calibrating the LSI against the HSI. I don't have any external oscillators. Thanks a lot for speedy response!

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Using RTC Alarm as a 4 hour timer. Getting the current time using HAL RTC API, adding 4 to the current hours value and setting the alarm for that time by keeping the minutes as the current time. The Alarm interrupt is late by 2-3 minutes. Why?

Re: Using RTC Alarm as a 4 hour timer. Getting the current time using HAL RTC API, adding 4 to the current hours value and setting the alarm for that time by keeping the minutes as the current time. The Alarm interrupt is late by 2-3 minutes. Why?