我在双模下使用STM32 G431，尝试捕获10 kHz波形。我一直很难通过HAL库接口/预分频器控制采样速率。我注意到，如果启用扫描功能，我可以实现速率并控制所述速率。如果没有扫描功能，速率似乎被限制在~300 ksps并且预分频器对其几乎没有影响。对于扫描模式1，数据更好，但我还剩下一堆其他数据（从通道的序列）那是垃圾。如果我减少扫描序列的转换次数，采样率按比例下降。2有没有办法让我得到我需要的采样率，并且在激活扫描模式功能的情况下得到（〉1 Msps），而不使用这个功能？
我附上了ADC初始化函数和数据的图像（左图显示低采样速率，右图显示高采样速率和垃圾数据）。

void MX_ADC1_Init(void)
{
  ADC_MultiModeTypeDef multimode = {0};
  ADC_ChannelConfTypeDef sConfig = {0};

  hadc1.Instance = ADC1;

  hadc1.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV1;
  hadc1.Init.Resolution = ADC_RESOLUTION_12B;
  hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc1.Init.GainCompensation = 0;
  hadc1.Init.ScanConvMode = ADC_SCAN_ENABLE;
  hadc1.Init.EOCSelection =ADC_EOC_SINGLE_CONV;
  hadc1.Init.LowPowerAutoWait = DISABLE;
  hadc1.Init.ContinuousConvMode = DISABLE;
  hadc1.Init.NbrOfConversion = 10;  // ADC_BUFFER_LEN;
  hadc1.Init.DiscontinuousConvMode = DISABLE;
  hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
  hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
  hadc1.Init.DMAContinuousRequests = DISABLE;
  hadc1.Init.Overrun = ADC_OVR_DATA_PRESERVED;
  hadc1.Init.OversamplingMode = DISABLE;

/*
  oversmp.Ratio = ADC_OVERSAMPLING_RATIO_16;
  oversmp.RightBitShift = 0;
  oversmp.TriggeredMode = ADC_TRIGGEREDMODE_SINGLE_TRIGGER;
  oversmp.OversamplingStopReset = ADC_REGOVERSAMPLING_RESUMED_MODE;
  hadc1.Init.Oversampling = oversmp;
*/
  if (HAL_ADC_Init(&hadc1) != HAL_OK)
  {
  }

  // Configure the ADC multi-mode
  multimode.Mode = ADC_DUALMODE_REGSIMULT;
  multimode.DMAAccessMode = ADC_DMAACCESSMODE_12_10_BITS;
  multimode.TwoSamplingDelay = ADC_TWOSAMPLINGDELAY_1CYCLE;
  if (HAL_ADCEx_MultiModeConfigChannel(&hadc1, &multimode) != HAL_OK)
  {
  }

  // Configure Regular Channel
  sConfig.Channel = ADC_CHANNEL_15;
  sConfig.Rank = ADC_REGULAR_RANK_1;
  sConfig.SamplingTime = ADC_SAMPLETIME_6CYCLES_5;
  sConfig.SingleDiff = ADC_SINGLE_ENDED;
  sConfig.OffsetNumber = ADC_OFFSET_NONE;
  sConfig.Offset = 0;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    //Error_Handler();
  }

  HAL_ADC_Start(&hadc2);
}

/**
 * Initializes ADC2
 */
void MX_ADC2_Init(void)
{
  /* USER CODE BEGIN ADC1_Init 0 */

  /* USER CODE END ADC1_Init 0 */

  ADC_MultiModeTypeDef multimode = {0};
  ADC_ChannelConfTypeDef sConfig = {0};
  /* USER CODE BEGIN ADC1_Init 1 */

  /* USER CODE END ADC1_Init 1 */
  /** Common config
  */
  hadc2.Instance = ADC2;

  hadc2.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV2;
  hadc2.Init.Resolution = ADC_RESOLUTION_12B;
  hadc2.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc2.Init.GainCompensation = 0;
  hadc2.Init.ScanConvMode = ADC_SCAN_ENABLE;
  hadc2.Init.EOCSelection =ADC_EOC_SINGLE_CONV;
  hadc2.Init.LowPowerAutoWait = DISABLE;
  hadc2.Init.ContinuousConvMode = ENABLE;
  hadc2.Init.NbrOfConversion = 2;//ADC_BUFFER_LEN;
  hadc2.Init.DiscontinuousConvMode = DISABLE;

  hadc2.Init.DMAContinuousRequests = DISABLE;
  hadc2.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;
  hadc2.Init.OversamplingMode = DISABLE;
  /*hadc2.Init.Oversampling = oversmp;*/
  if (HAL_ADC_Init(&hadc2) != HAL_OK)
  {
   // Error_Handler();
  }

  sConfig.Channel = ADC_CHANNEL_17;
  sConfig.Rank = ADC_REGULAR_RANK_1;
  sConfig.SamplingTime = ADC_SAMPLETIME_6CYCLES_5;
  sConfig.SingleDiff = ADC_SINGLE_ENDED;
  sConfig.OffsetNumber = ADC_OFFSET_NONE;
  sConfig.Offset = 0;
  if (HAL_ADC_ConfigChannel(&hadc2, &sConfig) != HAL_OK)
  {
    //Error_Handler();
  }

  /* USER CODE END ADC1_Init 2 */
  HAL_ADC_Start(&hadc2);
}