关于STM32L052采样AD中断遇到奇怪问题

只看该作者 · 2016-1-30 09:24

前天STM32L052采样AD双通道切换问题，解决。
void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* AdcHandle)
{
  /* Get the converted value of regular channel */

  uwADCxConvertedValue = HAL_ADC_GetValue(AdcHandle);

  HAL_ADC_Stop_IT(&hadc);
      if(CH_dp==0)
      {
            CH_dp=1;
            ADC1->CHSELR = ADC_CHANNEL_2;
      }
      else
      {
            CH_dp=0;
            ADC1->CHSELR = ADC_CHANNEL_7;
      }

      HAL_ADC_Start_IT(&hadc);

UART_Transmit_IT(&huart1, (uint8_t*)uwADCxConvertedValue, 4);
}

但我发现把UART_Transmit_IT(&huart1, (uint8_t*)uwADCxConvertedValue, 4);屏蔽掉就进不了AD中断
我程序，只用到AD、串口、TIM21中断，不可能出现死循环。

只看该作者 · 2016-1-30 09:25

/* ADC init function */
void MX_ADC_Init(void)
{
  ADC_ChannelConfTypeDef sConfig;

  hadc.Instance = ADC1;

  hadc.Init.OversamplingMode = ENABLE;
  hadc.Init.Oversample.Ratio = ADC_OVERSAMPLING_RATIO_128;
  hadc.Init.Oversample.RightBitShift = ADC_RIGHTBITSHIFT_3;
  hadc.Init.Oversample.TriggeredMode = ADC_TRIGGEREDMODE_SINGLE_TRIGGER;

  hadc.Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV1;
  hadc.Init.Resolution = ADC_RESOLUTION12b;
  hadc.Init.SamplingTime = ADC_SAMPLETIME_7CYCLES_5;
  hadc.Init.ScanConvMode = ADC_SCAN_DIRECTION_FORWARD;
  hadc.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc.Init.ContinuousConvMode = ENABLE;
  hadc.Init.DiscontinuousConvMode = DISABLE;
  hadc.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIG_EDGE_NONE;
  hadc.Init.DMAContinuousRequests = DISABLE;
  hadc.Init.EOCSelection = EOC_SINGLE_CONV;
  hadc.Init.Overrun = OVR_DATA_PRESERVED;
  hadc.Init.LowPowerAutoWait = DISABLE;
  hadc.Init.LowPowerFrequencyMode = ENABLE;
  hadc.Init.LowPowerAutoPowerOff = DISABLE;
  HAL_ADC_Init(&hadc);

/* USER CODE BEGIN 7 */
  if (HAL_ADCEx_Calibration_Start(&hadc, ADC_SINGLE_ENDED) != HAL_OK)
  {
Error_Handler();
  }
  /* USER CODE END 7 */
/**Configure for the selected ADC regular channel to be converted.
*/
  sConfig.Channel = ADC_CHANNEL_7;
  sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;
  HAL_ADC_ConfigChannel(&hadc, &sConfig);
}

只看该作者 · 2016-1-30 20:10

中断函数是怎么写的啊

只看该作者 · 2016-2-18 08:08

问题解决，谢谢
原因不使用volatile修饰

关于STM32L052采样AD中断遇到奇怪问题

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