AD一启动采样就出错

1万 · 2023-3-11 14:45

我用STM32CUBEMX生成ADC和串口初始化代码，AD是软件启动。
AD初始化代码如下：

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.ClockPrescaler = ADC_CLOCK_ASYNC_DIV1;

  hadc1.Init.Resolution = ADC_RESOLUTION_14B;

  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.ExternalTrigConv = ADC_SOFTWARE_START;

  hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;

  hadc1.Init.DMAContinuousRequests = DISABLE;

  hadc1.Init.TriggerFrequencyMode = ADC_TRIGGER_FREQ_HIGH;

  hadc1.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;

  hadc1.Init.LeftBitShift = ADC_LEFTBITSHIFT_NONE;

  hadc1.Init.ConversionDataManagement = ADC_CONVERSIONDATA_DR;

  hadc1.Init.OversamplingMode = DISABLE;

  if (HAL_ADC_Init(&hadc1) != HAL_OK)

  {

    Error_Handler();

  }



  /** Configure Regular Channel

  */

  sConfig.Channel = ADC_CHANNEL_9;

  sConfig.Rank = ADC_REGULAR_RANK_1;

  sConfig.SamplingTime = ADC_SAMPLETIME_5CYCLE;

  sConfig.SingleDiff = ADC_SINGLE_ENDED;

  sConfig.OffsetNumber = ADC_OFFSET_NONE;

  sConfig.Offset = 0;

  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)

  {

    Error_Handler();

  }

  /* USER CODE BEGIN ADC1_Init 2 */



  /* USER CODE END ADC1_Init 2 */



}

不启动ADC转换的时候，串口打印正常。
我一启动AD采样：

复制

if (HAL_ADC_Start(&hadc1) != HAL_OK)

        {

                /* Error: ADC conversion start could not be performed */

                HAL_UART_Transmit(&huart2, (uint8_t *)aTxBuffer1, TXBUFFERSIZE, 5000);

                Error_Handler();

        }

就进入Error_Handler();
这是怎么回事呀？谢谢！