STM32L4r5vit rtc alarm to wakeup from stopmode2

[AJ.2]

how to implement STM32L4r5vit rtc alarm to wakeup from stopmode2

[STTwo-32]

Hello @AJ.2 

I suggest you to take a look at the following example to understand how to wake-up from stop2 using an RTC wakeup timer.

Best Regards.

STTwo-32 

[AJ.2]

can we wakeup from stop mode from RTC internal alarm

[STTwo-32]

According to the RM0432,  the RTC alarm,RTC tamper event, RTC timestamp event, and RTC Wakeup cause the device to exit the Stop mode.

Best Regards.

STTwo-32 

[AJ.2]

Hi i am able to enter stop mode but after returning stop mode again i am unable enter stop mode

HAL_RTCEx_DeactivateWakeUpTimer(&hrtc); 

HAL_RTCEx_SetWakeUpTimer_IT(&hrtc, 0x3FFF, RTC_WAKEUPCLOCK_RTCCLK_DIV16);

HAL_SuspendTick();

HAL_PWREx_EnterSTOP2Mode(PWR_STOPENTRY_WFI);  

if(__HAL_PWR_GET_FLAG(PWR_FLAG_SB) != RESET){

/* Clear standby flag */

__HAL_PWR_CLEAR_FLAG(PWR_FLAG_SB);

}

__HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);

__HAL_PWR_CLEAR_FLAG(PWR_FLAG_WUF2);

__HAL_PWR_CLEAR_FLAG(PWR_EXTI_LINE_PVD);

__HAL_PWR_CLEAR_FLAG(PWR_FLAG_WUFI); 

HAL_ResumeTick();