How to reading wakeup flag?

[Macun]

I want to know which Wakeup pin or Reset pin wakes up the microprocessor that enters standby mode. I have 2 wakeup pins.
I am monitoring SR1 and SR2 variables with Live expression in Debug mode, but when I wake up from standby mode, the value of the variables does not change.

Is there a method other than the code block below?

I am grateful in advance.

/* USER CODE BEGIN 2 */

CheckWakeupPins();

/* USER CODE END 2 */

/* USER CODE BEGIN 4 */

void CheckWakeupPins(void) {

// Ensure the PWR clock is enabled

__HAL_RCC_PWR_CLK_ENABLE();

 

// Read the wakeup pin status from PWR_SR1

uint32_t wakeup_status = __HAL_PWR_GET_FLAG(PWR_FLAG_WU);

 

// Check individual wakeup pins - adjust mask as per your device's definitions

SR1 = (wakeup_status & PWR_FLAG_WUF1) ? 1 : 0;

SR2 = (wakeup_status & PWR_FLAG_WUF2) ? 1 : 0;

HAL_Delay(3000);

 

// Clear the wakeup flags after processing to avoid retriggering

__HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);

}

/* USER CODE END 4 */

 

[Hl_st]

Hello,

method you are using is correct, but in masking wakeup flag don´t use PWR_FLAG_WUF1 but PWR_SR1_WUF1 and instead of PWR_FLAG_WUF2 use PWR_SR1_WUF2 and it should work fine.

[Macun]

You can see the coding in the attached image.

When both WKUP pins are woken up, only the LED named GPIO_PIN_8 lights up.
So WUF2 is never HIGH.

GPIO_PIN_8 when woken up with pin 1,
GPIO_PIN_7 should work when woken up with pin 2, but GPIO_PIN_8 works even when I wake it up with pin 2.

[hardrock]

void EnterStandbyMode(void)
{
 // Enable Power Peripheral
 __HAL_RCC_PWR_CLK_ENABLE();

 HAL_PWR_DisableWakeUpPin(PWR_WAKEUP_PIN2);

 // Clear PWR Wake-up Flag
 __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);

 // Enable WKUP pin
 HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN2);

 // Enter STANDBY Mode
 HAL_PWR_EnterSTANDBYMode();
}

void CheckWakeupReason(void)
{
 if(__HAL_RCC_GET_FLAG(RCC_FLAG_PINRST)) {
 // [Wakeup Reason] Hardware Reset Pin
 }

 if(__HAL_RCC_GET_FLAG(RCC_FLAG_SFTRST)) {
 // [Wakeup Reason] Software Reset
 }

 if(__HAL_PWR_GET_FLAG(PWR_FLAG_SB)) {
 // [Wakeup Reason] Standby Mode
 __HAL_PWR_CLEAR_FLAG(PWR_FLAG_SB);
 }
}