我使用的是stm32g431这款芯片，现在想采样两路模拟信号，为了采样速度更快，想用adc1和adc2两个模块分别对这两路进行采样。使用ADC_DUALMODE_INJECSIMULT(双AD同步注入模式)，CUBE配置如下所示，使用定时器更新事件触发ADC注入转换。

ADC1模块配置：

ADC2模块配置(ADC1配置了同步触发，此时ADC2配置页面中无触发源选项配置，其他与ADC1保持不变)

在CUBE生成的初始化代码后添加一些ADC启动代码：

问题出现：

只有ADC1的注入通道有数据，ADC2的注入通道无数据。

想问一下这个是什么情况呢？我试过两个ADC模块都使用独立模式(ADC_MODE_INDEPENDENT)，触发源与模块ADC1一致，这样是有数据的。如下：

修改的代码如下：

使用上述配置的双ADC模式同步注入转换，CUBE生成的代码如下：(ADC2无数据)

/* ADC1 init function */
void MX_ADC1_Init(void)
{

  /* USER CODE BEGIN ADC1_Init 0 */

  /* USER CODE END ADC1_Init 0 */

  ADC_MultiModeTypeDef multimode = {0};
  ADC_InjectionConfTypeDef sConfigInjected = {0};

  /* USER CODE BEGIN ADC1_Init 1 */

  /* USER CODE END ADC1_Init 1 */

  /** Common config
  */
  hadc1.Instance = ADC1;
  hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4;
  hadc1.Init.Resolution = ADC_RESOLUTION_12B;
  hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc1.Init.GainCompensation = 0;
  hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE;
  hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
  hadc1.Init.LowPowerAutoWait = DISABLE;
  hadc1.Init.ContinuousConvMode = DISABLE;
  hadc1.Init.NbrOfConversion = 1;
  hadc1.Init.DiscontinuousConvMode = DISABLE;
  hadc1.Init.DMAContinuousRequests = DISABLE;
  hadc1.Init.Overrun = ADC_OVR_DATA_PRESERVED;
  hadc1.Init.OversamplingMode = DISABLE;
  if (HAL_ADC_Init(&hadc1) != HAL_OK)
  {
    Error_Handler();
  }

  /** Configure the ADC multi-mode
  */
  multimode.Mode = ADC_DUALMODE_INJECSIMULT;
  multimode.DMAAccessMode = ADC_DMAACCESSMODE_DISABLED;
  multimode.TwoSamplingDelay = ADC_TWOSAMPLINGDELAY_1CYCLE;
  if (HAL_ADCEx_MultiModeConfigChannel(&hadc1, &multimode) != HAL_OK)
  {
    Error_Handler();
  }
  //修改为独立模式
//  multimode.Mode = ADC_MODE_INDEPENDENT;
//  multimode.DMAAccessMode = ADC_DMAACCESSMODE_DISABLED;
//  multimode.TwoSamplingDelay = ADC_TWOSAMPLINGDELAY_1CYCLE;
//  if (HAL_ADCEx_MultiModeConfigChannel(&hadc1, &multimode) != HAL_OK)
//  {
//    Error_Handler();
//  } 
  /** Configure Injected Channel
  */
  sConfigInjected.InjectedChannel = ADC_CHANNEL_1;
  sConfigInjected.InjectedRank = ADC_INJECTED_RANK_1;
  sConfigInjected.InjectedSamplingTime = ADC_SAMPLETIME_2CYCLES_5;
  sConfigInjected.InjectedSingleDiff = ADC_SINGLE_ENDED;
  sConfigInjected.InjectedOffsetNumber = ADC_OFFSET_NONE;
  sConfigInjected.InjectedOffset = 0;
  sConfigInjected.InjectedNbrOfConversion = 1;
  sConfigInjected.InjectedDiscontinuousConvMode = DISABLE;
  sConfigInjected.AutoInjectedConv = DISABLE;
  sConfigInjected.QueueInjectedContext = DISABLE;
  sConfigInjected.ExternalTrigInjecConv = ADC_EXTERNALTRIGINJEC_T1_TRGO;
  sConfigInjected.ExternalTrigInjecConvEdge = ADC_EXTERNALTRIGINJECCONV_EDGE_RISING;
  sConfigInjected.InjecOversamplingMode = DISABLE;
  if (HAL_ADCEx_InjectedConfigChannel(&hadc1, &sConfigInjected) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN ADC1_Init 2 */

  if(HAL_ADCEx_Calibration_Start(&hadc1,ADC_SINGLE_ENDED) != HAL_OK )//ADC模块的自校正(单端信号)
  {
    Error_Handler();
  }
  __HAL_ADC_ENABLE_IT(&hadc1,ADC_IT_JEOC);
  HAL_ADCEx_InjectedStart(&hadc1);
  /* USER CODE END ADC1_Init 2 */

}
/* ADC2 init function */
void MX_ADC2_Init(void)
{

  /* USER CODE BEGIN ADC2_Init 0 */

  /* USER CODE END ADC2_Init 0 */

  ADC_InjectionConfTypeDef sConfigInjected = {0};

  /* USER CODE BEGIN ADC2_Init 1 */

  /* USER CODE END ADC2_Init 1 */

  /** Common config
  */
  hadc2.Instance = ADC2;
  hadc2.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4;
  hadc2.Init.Resolution = ADC_RESOLUTION_12B;
  hadc2.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc2.Init.GainCompensation = 0;
  hadc2.Init.ScanConvMode = ADC_SCAN_DISABLE;
  hadc2.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
  hadc2.Init.LowPowerAutoWait = DISABLE;
  hadc2.Init.ContinuousConvMode = DISABLE;
  hadc2.Init.NbrOfConversion = 1;
  hadc2.Init.DiscontinuousConvMode = DISABLE;
  hadc2.Init.DMAContinuousRequests = DISABLE;
  hadc2.Init.Overrun = ADC_OVR_DATA_PRESERVED;
  hadc2.Init.OversamplingMode = DISABLE;
  if (HAL_ADC_Init(&hadc2) != HAL_OK)
  {
    Error_Handler();
  }

  /** Configure Injected Channel
  */
  sConfigInjected.InjectedChannel = ADC_CHANNEL_2;
  sConfigInjected.InjectedRank = ADC_INJECTED_RANK_1;
  sConfigInjected.InjectedSamplingTime = ADC_SAMPLETIME_2CYCLES_5;
  sConfigInjected.InjectedSingleDiff = ADC_SINGLE_ENDED;
  sConfigInjected.InjectedOffsetNumber = ADC_OFFSET_NONE;
  sConfigInjected.InjectedOffset = 0;
  sConfigInjected.InjectedNbrOfConversion = 1;
  sConfigInjected.InjectedDiscontinuousConvMode = DISABLE;
  sConfigInjected.AutoInjectedConv = DISABLE;
  sConfigInjected.QueueInjectedContext = DISABLE;
  //修改成独立模式后，手动添加以下2行触发源配置代码。
//  sConfigInjected.ExternalTrigInjecConv = ADC_EXTERNALTRIGINJEC_T1_TRGO;
//  sConfigInjected.ExternalTrigInjecConvEdge = ADC_EXTERNALTRIGINJECCONV_EDGE_RISING;  

  sConfigInjected.InjecOversamplingMode = DISABLE;
  if (HAL_ADCEx_InjectedConfigChannel(&hadc2, &sConfigInjected) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN ADC2_Init 2 */
  if(HAL_ADCEx_Calibration_Start(&hadc2,ADC_SINGLE_ENDED) != HAL_OK )
  {
    Error_Handler();
  }
  HAL_ADCEx_InjectedStart(&hadc2);
  /* USER CODE END ADC2_Init 2 */

}

我这边配置跟你基本一样，启动ADC1 ADC2的注入转换，启动定时器。


然后循环查询转换结果，没有什么问题。


   if( HAL_ADCEx_InjectedPollForConversion(&hadc1,  0xaaaa)== HAL_OK)
   {
   
   ResultADC1=  HAL_ADCEx_InjectedGetValue(&hadc1,  ADC_INJECTED_RANK_1);
   
   ResultADC2=   HAL_ADCEx_InjectedGetValue(&hadc2,  ADC_INJECTED_RANK_1);
     
      __HAL_ADC_CLEAR_FLAG(&hadc1, ADC_FLAG_JEOS);
     
        __HAL_ADC_CLEAR_FLAG(&hadc2, ADC_FLAG_JEOS);
   
   }



我也是ADC1 ADC2各用1个通道，ADC1的通道信号稳定，所以结果稳定。ADC2通道悬空，结果飘动。

xmshao 发表于 2025-1-7 17:05
我这边配置跟你基本一样，启动ADC1 ADC2的注入转换，启动定时器。</p>
<p>

谢谢回答！

请问你用的也是G431这款芯片验证的吗？我之前有用过F407的双ADC模块同步注入，印象中没出现过问题。。

还有就是，如果你的程序中不加你写的"循环查询转换结果"代码段，只从Watch里面去看寄存器数据hadc1.Instance->JDR1和hadc1.Instance->JDR2，这两个数据是不是也应该一直在刷新呢？我的程序中没有写ADC_IT_JEOS标志位的清除语句，但我觉得这对寄存器中的数据没有影响。

我也是使用STM32G474芯片，ADC这块474 和 431是一样的。


我把主循环代码 完全 屏蔽掉，只启动ADC1 /2 和TIMER，


依然可以看到结果的变化：







不行，你通过私信把邮件给我，我把配置给你参考下。