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STM32F0 ADC多通道单次转换，最后一个通道的EOC不置位

shaodong-350471 提问时间：2019-12-31 13:48 /

问答
是否解决:

STM32F030 ADC采样序列中包括IN0,IN1,IN2三个通道，采用单次转换模式，软件触发启动，但是发现采样转换到最后一个通道IN2时，EOC不会置位，程序进入超时状态。有哪位朋友碰到过此问题？主要代码如下：

uint16_t  ADCValue[3;
void MX_ADC_Init(void)
{
  ADC_ChannelConfTypeDef sConfig;
  hadc.Instance = ADC1;
  hadc.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV1;
  hadc.Init.Resolution = ADC_RESOLUTION_12B;
  hadc.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc.Init.ScanConvMode = ADC_SCAN_DIRECTION_FORWARD;
  hadc.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
  hadc.Init.LowPowerAutoWait = DISABLE;
  hadc.Init.LowPowerAutoPowerOff = DISABLE;
  hadc.Init.ContinuousConvMode = DISABLE;
  hadc.Init.DiscontinuousConvMode = DISABLE;
  hadc.Init.ExternalTrigConv = ADC_SOFTWARE_START;
  hadc.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
  hadc.Init.DMAContinuousRequests = DISABLE;
  hadc.Init.Overrun = ADC_OVR_DATA_PRESERVED;
  if (HAL_ADC_Init(&hadc) != HAL_OK)
  {
_Error_Handler(__FILE__, __LINE__);
  }

  sConfig.Channel = ADC_CHANNEL_0;
  sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;
  sConfig.SamplingTime = ADC_SAMPLETIME_7CYCLES_5;
  if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)
  {
_Error_Handler(__FILE__, __LINE__);
  }

  sConfig.Channel = ADC_CHANNEL_1;
  if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)
  {
_Error_Handler(__FILE__, __LINE__);
  }

  sConfig.Channel = ADC_CHANNEL_2;
  if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)
  {
_Error_Handler(__FILE__, __LINE__);
  }
}

void Get_ADCVal(void)
{
  uint8_t  i;

  if (HAL_ADC_Start(&hadc) != HAL_OK)
  {
_Error_Handler(__FILE__, __LINE__);
  }

  for ( i=0;  i<3;  i++ )
  {
if (HAL_ADC_PollForConversion(&hadc, 20) != HAL_OK)
   _Error_Handler(__FILE__, __LINE__); // ********** 当 i 递增到2时，程序执行死在这里！！！！！！！！！！
else
   ADCValue[i = HAL_ADC_GetValue(&hadc);
  }
// HAL_ADC_Stop(&hadc);
}