STM32G030K6T6單片機ADC DMA多通道采樣數據不正確

ID:955654 · 發表于 2022-1-13 10:06

ADC DMA多通道  進行采樣時，獲取到得數據與實際不一致，單通道時是對的

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_SYNC_PCLK_DIV2;
  hadc1.Init.Resolution = ADC_RESOLUTION_12B;
  hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE;
  hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
  hadc1.Init.LowPowerAutoWait = DISABLE;
  hadc1.Init.LowPowerAutoPowerOff = DISABLE;
  hadc1.Init.ContinuousConvMode = ENABLE;
  hadc1.Init.NbrOfConversion = 12;
  hadc1.Init.DiscontinuousConvMode = DISABLE;
  hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
  hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
  hadc1.Init.DMAContinuousRequests = ENABLE;
  hadc1.Init.Overrun = ADC_OVR_DATA_PRESERVED;
  hadc1.Init.SamplingTimeCommon1 = ADC_SAMPLETIME_39CYCLES_5;
  hadc1.Init.SamplingTimeCommon2 = ADC_SAMPLETIME_39CYCLES_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 = 0;
  sConfig.SamplingTime = ADC_SAMPLETIME_39CYCLES_5;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
Error_Handler();
  }

      sConfig.Channel = ADC_CHANNEL_1;
  sConfig.Rank = 1;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
Error_Handler();
  }

      sConfig.Channel = ADC_CHANNEL_2;
sConfig.Rank = 2;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
Error_Handler();
  }

      sConfig.Channel = ADC_CHANNEL_3;
  sConfig.Rank = 3;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
Error_Handler();
  }

      sConfig.Channel = ADC_CHANNEL_4;
  sConfig.Rank = 4;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
Error_Handler();
  }

      sConfig.Channel = ADC_CHANNEL_5;
  sConfig.Rank = 5;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
Error_Handler();
  }

      sConfig.Channel = ADC_CHANNEL_6;
  sConfig.Rank = 6;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
Error_Handler();
  }

      sConfig.Channel = ADC_CHANNEL_7;
  sConfig.Rank = 7;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
Error_Handler();
  }

      sConfig.Channel = ADC_CHANNEL_8;
  sConfig.Rank = 8;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
Error_Handler();
  }

      sConfig.Channel = ADC_CHANNEL_9;
  sConfig.Rank = 9;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
Error_Handler();
  }

      sConfig.Channel = ADC_CHANNEL_10;
  sConfig.Rank = 10;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
Error_Handler();
  }

      sConfig.Channel = ADC_CHANNEL_11;
  sConfig.Rank = 11;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
Error_Handler();
  }
}

void adc_Dma_start(void)
{
      HAL_ADCEx_Calibration_Start(&hadc1);
      HAL_ADC_Start_DMA(&hadc1,(uint32_t *)&adcBuff,12);
}

ID:607298 · 發表于 2022-1-13 14:21

這邊掃描模式應該要使能吧，hadc1.Init.ScanConvMode = ADC_SCAN_ENABLE;
另外adcBuff感覺有點小，才能存一次結果。一般我都設置至少存個10次的結果。

ID:955654 · 發表于 2022-1-13 14:35

lightday 發表于 2022-1-13 14:21
這邊掃描模式應該要使能吧，hadc1.Init.ScanConvMode = ADC_SCAN_ENABLE;
另外adcBuff感覺有點小，才能存 ...

問題已經解決了，adc 通道配置成不完全配置序列模式既 ScanConvMode = ADC_SCAN_SEQ_FIXED
還有個 Rank = ADC_RANK_CHANNEL_NUMBER

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STM32G030K6T6單片機ADC DMA多通道采樣數據不正確