STM32G070 ADC with DMA error

[HPATH.1]

I configured ADC with DMA for 5 channels.

but converted values are wrong. Last channel value stored in First in the buffer and

First channel value copied to remaining buffer

static void MX_ADC1_Init(void)
{
  ADC_ChannelConfTypeDef sConfig = {0};
  /** Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion) */
  hadc1.Instance = ADC1;
  hadc1.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV1;
  hadc1.Init.Resolution = ADC_RESOLUTION_12B;
  hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc1.Init.ScanConvMode = ADC_SCAN_ENABLE; // ADC_SCAN_ENABLE;
  hadc1.Init.EOCSelection = ADC_EOC_SEQ_CONV; // ADC_EOC_SEQ_CONV;  //ADC_EOC_SINGLE_CONV; one start signal after every scan
  hadc1.Init.LowPowerAutoWait = DISABLE;
  hadc1.Init.LowPowerAutoPowerOff = DISABLE;
  hadc1.Init.ContinuousConvMode = DISABLE;  // THIS SHOULD BE DISABLE
  hadc1.Init.NbrOfConversion = ADC_CONVERTED_DATA_BUFFER_SIZE;
  hadc1.Init.DiscontinuousConvMode = DISABLE; // enable
  hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START; //
  hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
  hadc1.Init.DMAContinuousRequests = DISABLE; //DISABLE
  hadc1.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN; //
  hadc1.Init.SamplingTimeCommon1 = ADC_SAMPLETIME_1CYCLE_5;
  hadc1.Init.SamplingTimeCommon2 = ADC_SAMPLETIME_160CYCLES_5;
  hadc1.Init.OversamplingMode = DISABLE;
  hadc1.Init.TriggerFrequencyMode = ADC_TRIGGER_FREQ_HIGH;
  if (HAL_ADC_Init(&hadc1) != HAL_OK)
  {
    Error_Handler();
  }
 
   // Configure Regular Channel
  sConfig.Channel = ADC_CHANNEL_0;
  sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }
  // Configure Regular Channel
  sConfig.Channel = ADC_CHANNEL_1;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }
  // Configure Regular Channel
  sConfig.Channel = ADC_CHANNEL_2;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }
 
  // Configure Regular Channel
  sConfig.Channel = ADC_CHANNEL_3;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }
 
  // Configure Regular Channel
  sConfig.Channel = ADC_CHANNEL_4;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }
 
}

void HAL_ADC_MspInit(ADC_HandleTypeDef* hadc)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(hadc->Instance==ADC1)
  {
  /* USER CODE BEGIN ADC1_MspInit 0 */
 
  /* USER CODE END ADC1_MspInit 0 */
    /* Peripheral clock enable */
    __HAL_RCC_ADC_CLK_ENABLE();
 
    __HAL_RCC_GPIOA_CLK_ENABLE();
    __HAL_RCC_GPIOC_CLK_ENABLE();
    __HAL_RCC_GPIOB_CLK_ENABLE();
    /**ADC1 GPIO Configuration
    PA0     ------> ADC1_IN0
    PA1     ------> ADC1_IN1
    PA2     ------> ADC1_IN2
    PA3     ------> ADC1_IN3
    PA4     ------> ADC1_IN4
    PA5     ------> ADC1_IN5
    PA6     ------> ADC1_IN6
    PA7     ------> ADC1_IN7
    PC4     ------> ADC1_IN17
    PC5     ------> ADC1_IN18
    PB10     ------> ADC1_IN11
    PB11     ------> ADC1_IN15
    PB12     ------> ADC1_IN16
    */
    GPIO_InitStruct.Pin = GPIO_PIN_0 |GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3 | GPIO_PIN_4;
                          //|GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7;
    GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/*
    GPIO_InitStruct.Pin = GPIO_PIN_4|GPIO_PIN_5;
    GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
 
    GPIO_InitStruct.Pin = GPIO_PIN_10|GPIO_PIN_11|GPIO_PIN_12;
    GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
*/
    /* ADC1 DMA Init */
     /* ADC1 Init */
 
     hdma_adc1.Instance = DMA1_Channel1;
     hdma_adc1.Init.Request = DMA_REQUEST_ADC1;
     hdma_adc1.Init.Direction = DMA_PERIPH_TO_MEMORY;
     hdma_adc1.Init.PeriphInc = DMA_PINC_DISABLE;
     hdma_adc1.Init.MemInc = DMA_MINC_ENABLE;
     hdma_adc1.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
     hdma_adc1.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
     hdma_adc1.Init.Mode = DMA_CIRCULAR;
     hdma_adc1.Init.Priority = DMA_PRIORITY_HIGH;
     if (HAL_DMA_Init(&hdma_adc1) != HAL_OK)
     {
       Error_Handler();
     }
 
     __HAL_LINKDMA(hadc,DMA_Handle,hdma_adc1);
 
     /* ADC1 interrupt Init */
     HAL_NVIC_SetPriority(ADC1_IRQn, 0, 0);
     HAL_NVIC_EnableIRQ(ADC1_IRQn);
  }
}

what could be wrong ? Value 25 should be in Last value in the buffer.

third to fifth values are copied from second channel.

When I configure only one channel then Conversion is ok.

[HPATH.1]

found problem in Rank assignment.

corrected as given below. It is working fine. used separate Rank for each channel.

but HAL generated code above. dont know why.

   // Configure Regular Channel
  sConfig.Channel = ADC_CHANNEL_0;
  sConfig.Rank = ADC_REGULAR_RANK_1;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }
 
  // Configure Regular Channel
  sConfig.Channel = ADC_CHANNEL_1;
  sConfig.Rank = ADC_REGULAR_RANK_2;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }
 
  // Configure Regular Channel
  sConfig.Channel = ADC_CHANNEL_2;
  sConfig.Rank = ADC_REGULAR_RANK_3;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }
 
  // Configure Regular Channel
  sConfig.Channel = ADC_CHANNEL_3;
  sConfig.Rank = ADC_REGULAR_RANK_4;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }