what is the process for stop mode wakeup

[David.Cheng]

I have some code like below

while (1)
 
  {
 
    HAL_GPIO_WritePin(LED_1_GPIO_Port, LED_1_Pin, GPIO_PIN_SET);
 
    HAL_Delay(1000);
 
    HAL_GPIO_WritePin(LED_1_GPIO_Port, LED_1_Pin, GPIO_PIN_RESET);
 
 
    HAL_RTCEx_DeactivateWakeUpTimer(&hrtc);
 
 
    if (HAL_RTCEx_SetWakeUpTimer_IT(&hrtc, 5, RTC_WAKEUPCLOCK_CK_SPRE_16BITS) != HAL_OK)
 
    {
 
      Error_Handler();
 
    }
 
 
    __HAL_RCC_PWR_CLK_ENABLE();
 
    HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);
 
 
  }  
 
}

also I enable EXIT3 , i want to the detailed process if i trigger the EXIT3

if mcu in stop mode i trigger the EXIT3 does it need to reset the rtc timer in IRQ handler?

[Mohamed Aymen HZAMI]

Hello,

Which STM32 MCU are you using?

Regards,

Mohamed Aymen.

[David.Cheng]

STM32L0K8

[Tesla DeLorean]

These would probably be a good examples

STM32Cube_FW_L0_V1.10.0\Projects\STM32L011K4-Nucleo\Examples\PWR\PWR_STOP_RTC

STM32Cube_FW_L0_V1.10.0\Projects\STM32L011K4-Nucleo\Examples\PWR\PWR_STOP

basically a hybrid thereof.

My expectation is that either interrupt source would wake, and you should deactivate the RTC wakeup in the EXTI callback if it wakes via the EXTI event.