RTC wakeup interrupts

[RCase]

I'm looking for an example code with STM32G071 device using RTC interrupt to wakeup device from sleep mode based on HAL libraries. Thank you

[KDJEM.1]

Hello @RCase ,

I recommend you to get inspired from these examples to configure your own project:

- PWR_SLEEP : This example explains how to enter the Sleep mode and wake up from this mode by using an interrupt.

- How to configure the RTC to wake up the STM32 periodically from Low Power modes: This FAQ descripts how to configure the RTC peripheral of the STM32 to wake up the STM32 periodically from a low power mode.

I hope this help you.

Kaouthar

[RCase]

Is it possible to wakeup microcontroller from sleep mode using SystTick interrupt instead of RTC so to use it as TimeBase Source for my application? Thank you 

[KDJEM.1 · Accepted solution]

Hello @RCase ,

In Sleep mode: CPU clock off, all peripherals including Cortex®-M0+ core peripherals such as NVIC, SysTick, etc. can run and wake up the CPU when an interrupt or an event occurs. So, SysTick timer interrupt can wake-up the CPU. For more information, I advise you to take a look to RM0444  Section 4.3 Low-power modes.

Also, I think this discussion can help you.

Thank you for your contribution in STCommunity.

Kaouthar