STM32F030c8 ADC Multiple Channel Regular conversion mode Problem

[FYOL.1]

Hello.

I need 9 channel ADC data on STM32F030 MCU.

I want to read ADC CH0, ADC CH1.... ADC CH8 in order. (PA0, PA1, .... PA7, PB0)

It will be a simple application. I don't need DMA. 

I could not change the channel in Regular Conversion. I tried to read two channels to try. I always read the data of channel 0. I have a code like this.

For testing I wanted to read PA0 and PA1 data.

	/*Channel 0 (PA0) Selecting. */		
	ADC_CH_Cfg.Channel = ADC_CHANNEL_0;   //Channel Select   
        ADC_CH_Cfg.Rank =  ADC_RANK_CHANNEL_NUMBER;  
        ADC_CH_Cfg.SamplingTime = ADC_SAMPLETIME_71CYCLES_5;		
	if (HAL_ADC_ConfigChannel(&hadc, &ADC_CH_Cfg) != HAL_OK)  //Kanal Ayarlaniyor
	{
	    Error_Handler();
	}
	if (HAL_ADC_Start(&hadc) != HAL_OK) //ADC Start
        {
          Error_Handler();
        }
	if (HAL_ADC_PollForConversion(&hadc, HAL_MAX_DELAY) != HAL_OK)//Donusumun tamamlanmasini bekle
	{
	  Error_Handler();
	} 
	ADC_Data[0]=HAL_ADC_GetValue(&hadc);  //Get ADC value
	HAL_ADC_Stop(&hadc);
	HAL_Delay(100);
		
	/*Channel 1 (PA1) Selecting. */
	ADC_CH_Cfg.Channel = ADC_CHANNEL_1;   //Channel Select      
	ADC_CH_Cfg.Rank =  ADC_RANK_CHANNEL_NUMBER;
        ADC_CH_Cfg.SamplingTime = ADC_SAMPLETIME_71CYCLES_5;		
	if (HAL_ADC_ConfigChannel(&hadc, &ADC_CH_Cfg) != HAL_OK)
	{
	  Error_Handler();
	}
	if (HAL_ADC_Start(&hadc) != HAL_OK) //ADC Start
        {
          Error_Handler();
        }
	if (HAL_ADC_PollForConversion(&hadc, HAL_MAX_DELAY) != HAL_OK)//Donusumun tamamlanmasini bekle
	{
	  Error_Handler();
	} 
	ADC_Data[1]=HAL_ADC_GetValue(&hadc);  //Get ADC value
	HAL_ADC_Stop(&hadc);
	HAL_Delay(100);

My ADC settings are as follows.

  hadc.Instance = ADC1;
  hadc.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV1;
  hadc.Init.Resolution = ADC_RESOLUTION_12B;
  hadc.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc.Init.ScanConvMode = ADC_SCAN_DIRECTION_FORWARD;
  hadc.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
  hadc.Init.LowPowerAutoWait = DISABLE;
  hadc.Init.LowPowerAutoPowerOff = DISABLE;
  hadc.Init.ContinuousConvMode = DISABLE;
  hadc.Init.DiscontinuousConvMode = DISABLE;
  hadc.Init.ExternalTrigConv = ADC_SOFTWARE_START;
  hadc.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
  hadc.Init.DMAContinuousRequests = DISABLE;
  hadc.Init.Overrun = ADC_OVR_DATA_PRESERVED;
  if (HAL_ADC_Init(&hadc) != HAL_OK)
  {
    Error_Handler();
  }

What could be the problem? ADC always outputs Channel 0 data. 

[Hl_st]

Hello,

the easiest way how to switch between reading each ADC channels is to use direct register control as it is in this example:

    /* read analog value from PA0 */
    MODIFY_REG(ADC1->CHSELR,0xFFFFFF,ADC_CHANNEL_0);
    HAL_ADC_Start(&hadc1);
    HAL_ADC_PollForConversion(&hadc1, 100);
    uint8_t res = HAL_ADC_GetValue(&hadc1);
    printf("resA0:%d\n\r", res);
    HAL_ADC_Stop(&hadc1);

    /* read analog value from PA1 */
    MODIFY_REG(ADC1->CHSELR,0xFFFFFF,ADC_CHANNEL_1);
    HAL_ADC_Start(&hadc1);
    HAL_ADC_PollForConversion(&hadc1, 100);
    res = HAL_ADC_GetValue(&hadc1);
    printf("resA1:%d\n\r", res);
    HAL_ADC_Stop(&hadc1);

where is used the same ADC configuration as in your code