Multi ADC READ

[meena]

I am trying to read Analog voltage from two different channel one is mains supply and another is battery voltage.But I am getting both values same in live expression window.Does my config wong.Pls help

void ADC_Mains(void)
	{
	ADC_ChannelConfTypeDef sConfig = {0};
	sConfig.Channel = ADC_CHANNEL_1;
	  sConfig.Rank = ADC_REGULAR_RANK_1;
	  sConfig.SamplingTime = ADC_SAMPLINGTIME_COMMON_1;
	  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)

	  	  {
		  Error_Handler();
	  	  }
	}

void ADC_Vbat(void)
	{
	ADC_ChannelConfTypeDef sConfig = {0};
	sConfig.Channel = ADC_CHANNEL_12;
	 sConfig.Rank = ADC_REGULAR_RANK_2;
	  sConfig.SamplingTime = ADC_SAMPLINGTIME_COMMON_2;
	  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)

	  	  {
		  Error_Handler();
	  	  }

	}







//  MAINS INPUT
	  	  ADC_Mains();
	  	  HAL_ADC_Start(&hadc1);
	  	  HAL_ADC_PollForConversion(&hadc1,1000);
	  	  MainsVge=HAL_ADC_GetValue(&hadc1);
	  	  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);
	    HAL_ADC_Stop(&hadc1);
	    HAL_Delay(100);

[TDK]

> sConfig.Rank = ADC_REGULAR_RANK_2;

If you're converting a single channel, this should be ADC_REGULAR_RANK_1.

Probably also need:

sConfig.SamplingTime = ADC_SAMPLINGTIME_COMMON_1;