c/c++语言开发共享STM32 多通道扫描 ADC数据错乱 HAL

问题：多通道ADC扫描+单次+DMA，发现工作一段时间后，DMA数据错位。按我的理解当前是单次模式，转换完成后应该自动停止，实际过程不太对。
解决办法：在DMA搬运结束中断中关闭ADC

void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc) { 		__HAL_ADC_DISABLE(&hadc1); 		// ... } 

多通道单次扫描+DMA搬运 配置如下：

ADC配置

static void MX_ADC1_Init(void) {    /* USER CODE BEGIN ADC1_Init 0 */    /* USER CODE END ADC1_Init 0 */    ADC_ChannelConfTypeDef sConfig = {0};    /* USER CODE BEGIN ADC1_Init 1 */    /* USER CODE END ADC1_Init 1 */   /** Common config    */   hadc1.Instance = ADC1;   hadc1.Init.ScanConvMode = ADC_SCAN_ENABLE;   hadc1.Init.ContinuousConvMode = DISABLE;   hadc1.Init.DiscontinuousConvMode = DISABLE;   hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;   hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;   hadc1.Init.NbrOfConversion = 2;   if (HAL_ADC_Init(&hadc1) != HAL_OK)   {     Error_Handler();   }   /** Configure Regular Channel    */   sConfig.Channel = ADC_CHANNEL_4;   sConfig.Rank = ADC_REGULAR_RANK_1;   sConfig.SamplingTime = ADC_SAMPLETIME_239CYCLES_5;   if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)   {     Error_Handler();   }   /** Configure Regular Channel    */   sConfig.Channel = ADC_CHANNEL_5;   sConfig.Rank = ADC_REGULAR_RANK_2;   if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)   {     Error_Handler();   }   /* USER CODE BEGIN ADC1_Init 2 */ 	HAL_ADCEx_Calibration_Start(&hadc1);					 //校准ADC 	HAL_ADC_Start_DMA(&hadc1, (uint32_t*) buff, 2); // 启动DMA转换 2个通道   /* USER CODE END ADC1_Init 2 */  } 

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_ADC1_CLK_ENABLE();        __HAL_RCC_GPIOA_CLK_ENABLE();     /**ADC1 GPIO Configuration         PA4     ------> ADC1_IN4     PA5     ------> ADC1_IN5      */     GPIO_InitStruct.Pin = GPIO_PIN_4|GPIO_PIN_5;     GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;     HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);      /* ADC1 DMA Init */     /* ADC1 Init */     hdma_adc1.Instance = DMA1_Channel1;     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_NORMAL;     hdma_adc1.Init.Priority = DMA_PRIORITY_LOW;     if (HAL_DMA_Init(&hdma_adc1) != HAL_OK)     {       Error_Handler();     }      __HAL_LINKDMA(hadc,DMA_Handle,hdma_adc1);    /* USER CODE BEGIN ADC1_MspInit 1 */    /* USER CODE END ADC1_MspInit 1 */   }  } 

其它拓展知识：

内部参考电压
当adc的外部参考电压不准时，可以考虑使用内部参考电压进行校准：
公式：
Vref = (1.2 / (adc_vref / 4095 * 3.3)) * 3.3
其中adc_vref为adc内部参考电压通道的数值。
实际电压 = Vref * Vch / 4095
(Vch是通道采集的adc的值)

c/c++开发分享STM32 多通道扫描 ADC数据错乱 HAL地址：https://blog.csdn.net/xinxiaoci/article/details/109239902