STM32 双ADC同步注入转换模式，模块ADC2没有数据。

1万 · 2025-1-9 11:22

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：

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[color=var(--default-a-color)]4个回答

[color=var(--default-a-next-color)]lzylzy1212[color=var(--default-a-next-color)]回答时间：前天 15:04

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 */}