stm32c011

please let me know my coding is correct ,whether usage of my exti is correct 

 while (1)
 {
	 HAL_Delay(300);
	 	 // MAINS INPUT
	 	 	 Adc_Mains();
	 	 	 HAL_ADC_Start(&hadc1);
	 	 	 HAL_ADC_PollForConversion(&hadc1,1000);
	 	 	 Mains=HAL_ADC_GetValue(&hadc1);
	 	 	 Mains=Mains*2/4095;
	 	 	 HAL_ADC_Stop(&hadc1);
	 HAL_Delay(100);

	 //Battery operation
	 Adc_Vbat();
	 HAL_ADC_Start(&hadc1);
	 HAL_ADC_PollForConversion(&hadc1,1000);
	 Vbat=HAL_ADC_GetValue(&hadc1);
	 Vbat=Vbat*2/4095;
	 HAL_ADC_Stop(&hadc1);
	 HAL_Delay(100);

	 //OPEN CIRCUIT DETECT
	 Adc_OCD();
	 	 	HAL_ADC_Start(&hadc1);
	 	 HAL_ADC_PollForConversion(&hadc1,1000);
	 	 OCD=HAL_ADC_GetValue(&hadc1);
	 	 OCD=OCD*2/4095;
	 	 HAL_ADC_Stop(&hadc1);
	 	 HAL_Delay(100);
	 	 //BATTERY TEMPARATURE
	 	 		Adc_Temp();
	 	 	 	 	HAL_ADC_Start(&hadc1);
	 	 	 	 HAL_ADC_PollForConversion(&hadc1,1000);
	 	 	 	 Temp=HAL_ADC_GetValue(&hadc1);
	 	 	 	 Temp=Temp*2/4095;
	 	 	 	 HAL_ADC_Stop(&hadc1);
	 	 	 	 HAL_Delay(100);

	 	 	 	// Check mains and mains fail

	 	 	 	if(Mains>0.1)
	 	 	 	{
	 	 	 		 if((Mains<1) &&(Vbat>0.9))
	 	 	 		 	 {
	 	 	 			 	 En_Emergency(1);
	 	 	 			 	Set_LED(0);

	 	 	 		 	 }

	 	 	 		 else
	 	 	 		 	 {
	 	 	 			 En_Emergency(0);
	 	 	 		 	 }
	 	 	 	 mainsOffTimer = 0;
	 	 	 	}
	 	 	// MAINS ON
	 	 	if(Mains>1.2)
	 	 	{
	 	 		if(Vbat>1.5 || Vbat<0.5) //OPEN CIRCUIT OR ZERO BATT LEVEL
	 	 				{
	 	 				Set_LED(0);
	 	 				Batt_Chrge(1);
	 	 				}
	 	 		else if(Vbat <0.94 ) // START CHARGING LEVEL
	 	 				{
	 	 				Set_LED(1);
	 	 				Batt_Chrge(1);
	 	 				}
	 	 		else if(Vbat >0.98 ) // STOP CHARGING LEVEL
	 	 				{
	 	 				Set_LED(1);
	 	 				Batt_Chrge(0);

	 	 				}
	 	 		//BATTERY TEMPARATURE CHECK

	 	 	 if(Temp<0.17 || Temp>0.83)
	 	 	 {
	 	 		Batt_Chrge(0);
	 	 		Triple_Flash();
	 	 	 }
	 	 	 else if((Temp>0.17 || Temp<0.83))
	 	 	 {
	 	 		Batt_Chrge(1);

	 	 	 }
	 	 	}
	 	 	if(Mains<0.1)
	 	 	{
	 	 	 mainsOffTimer++;

	 	 	 // Enter Shutdown mode if mains is off for 30 seconds
	 	 	 if (mainsOffTimer >= 300)
	 	 	 {
	 	 	 // Shutdown mode
	 	 	 // Disable EXTI for PA2 to prevent immediate wake-up
	 	 	 HAL_NVIC_DisableIRQ(EXTI2_3_IRQn);

	 	 	 // Enter deep sleep mode
	 	 	 SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
	 	 	 __WFI();

	 	 	 // Re-enable EXTI for PA2 after wake-up
	 	 	 HAL_NVIC_EnableIRQ(EXTI2_3_IRQn);
	 	 	 }
	 	 	}


 /* USER CODE END WHILE */

 /* USER CODE BEGIN 3 */
 }
 /* USER CODE END 3 */
}

/**
 * @brief System Clock Configuration
 * @retval None
 */
*
*
*
**
*
**
**
**
**
*
 * @brief GPIO Initialization Function
 * @PAram None
 * @retval None
 */
static void MX_GPIO_Init(void)
{
 GPIO_InitTypeDef GPIO_InitStruct = {0};
/* USER CODE BEGIN MX_GPIO_Init_1 */
/* USER CODE END MX_GPIO_Init_1 */

 /* GPIO Ports Clock Enable */
 __HAL_RCC_GPIOA_CLK_ENABLE();

 /*Configure GPIO pin Output Level */
 HAL_GPIO_WritePin(GPIOA, EMERGENCY_Pin|LED_Pin|BATTCHRG_Pin, GPIO_PIN_RESET);

 /*Configure GPIO pin : PA2 */
 GPIO_InitStruct.Pin = GPIO_PIN_2;
 GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
 GPIO_InitStruct.Pull = GPIO_NOPULL;
 HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

 /*Configure GPIO pins : EMERGENCY_Pin LED_Pin BATTCHRG_Pin */
 GPIO_InitStruct.Pin = EMERGENCY_Pin|LED_Pin|BATTCHRG_Pin;
 GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
 GPIO_InitStruct.Pull = GPIO_NOPULL;
 GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
 HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

 /* EXTI interrupt init*/
 HAL_NVIC_SetPriority(EXTI2_3_IRQn, 0, 0);
 HAL_NVIC_EnableIRQ(EXTI2_3_IRQn);

/* USER CODE BEGIN MX_GPIO_Init_2 */
/* USER CODE END MX_GPIO_Init_2 */
}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
 * @brief This function is executed in case of error occurrence.
 * @retval None
 */
void Error_Handler(void)
{
 /* USER CODE BEGIN Error_Handler_Debug */
 /* User can add his own implementation to report the HAL error return state */
 __disable_irq();
 while (1)
 {
 }
 /* USER CODE END Error_Handler_Debug */
}

#ifdef USE_FULL_ASSERT
/**
 * @brief Reports the name of the source file and the source line number
 * where the assert_param error has occurred.
 * @PAram file: pointer to the source file name
 * @PAram line: assert_param error line source number
 * @retval None
 */
void assert_failed(uint8_t *file, uint32_t line)
{
 /* USER CODE BEGIN 6 */
 /* User can add his own implementation to report the file name and line number,
 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
 /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */