STM32F4Cube库调试多通道ADC+DMA问题

亦轩阁提问时间：2015-2-5 19:38 /

我定义了个uint32_t ADC_Value_arr[4]={0,0,0,0};接收四个通道的ADC，单通道+DMA读取数据没有问题，多通道读取是只有ADC_Value_arr[0]有数据，并且数据特别大，达到8位，还不断变化，显然错了，不知道是何原因，实在发现不了错在哪里？贴上代码，希望有人能指出错误，非常感谢！！！
void HAL_ADC_MspInit(ADC_HandleTypeDef *hadc)
{
  GPIO_InitTypeDef       GPIO_InitStruct;
  static DMA_HandleTypeDef  hdma_adc;

/*##-1- Enable peripherals and GPIO Clocks #################################*/
  /* Enable GPIO clock */
  ADCx_CHANNEL_GPIO_CLK_ENABLE();
  /* ADC1 Periph clock enable */
  ADCx_CLK_ENABLE();
  /* Enable DMA2 clock */
  DMAx_CLK_ENABLE();

  /*##-2- Configure peripheral GPIO ##########################################*/
  /* ADC1 Channel2,3,6,7 GPIO pin configuration */
  GPIO_InitStruct.Pin = ADCx_CHANNEL_PIN2|ADCx_CHANNEL_PIN3|ADCx_CHANNEL_PIN6|ADCx_CHANNEL_PIN7;
  GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(ADCx_CHANNEL_GPIO_PORT, &GPIO_InitStruct);

  /*##-3- Configure the DMA streams ##########################################*/
  /* Set the parameters to be configured */
  hdma_adc.Instance = ADCx_DMA_STREAM; //选择stream0

  hdma_adc.Init.Channel  = ADCx_DMA_CHANNEL;//通道0
  hdma_adc.Init.Direction = DMA_PERIPH_TO_MEMORY;//ÍâÉèµÀÄÚ´æ
  hdma_adc.Init.PeriphInc = DMA_PINC_DISABLE;//ÍâÉè²»Ôö
  hdma_adc.Init.MemInc = DMA_MINC_ENABLE;//内存增
  hdma_adc.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD; //
  hdma_adc.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
  hdma_adc.Init.Mode = DMA_CIRCULAR; //循环模式
  hdma_adc.Init.Priority = DMA_PRIORITY_HIGH;
  hdma_adc.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
  hdma_adc.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_HALFFULL;
  hdma_adc.Init.MemBurst = DMA_MBURST_SINGLE;
  hdma_adc.Init.PeriphBurst = DMA_PBURST_SINGLE;

  HAL_DMA_Init(&hdma_adc);

  /* Associate the initialized DMA handle to the the ADC handle */
  __HAL_LINKDMA(hadc, DMA_Handle, hdma_adc);

  /*##-4- Configure the NVIC for DMA #########################################*/
  /* NVIC configuration for DMA transfer complete interrupt */
  HAL_NVIC_SetPriority(ADCx_DMA_IRQn, 5, 0);
  HAL_NVIC_EnableIRQ(ADCx_DMA_IRQn);
}

void set_ADC(void)
{
ADC_ChannelConfTypeDef sConfig;

  /* Configure the ADC peripheral */
  AdcHandle.Instance = ADCx;//ADC1

  AdcHandle.Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV4;//21MHZ
  AdcHandle.Init.Resolution = ADC_RESOLUTION12b; //12位
  //AdcHandle.Init.ScanConvMode = DISABLE;
AdcHandle.Init.ScanConvMode = ENABLE;//扫描模式
  AdcHandle.Init.ContinuousConvMode = ENABLE;//连续模式
  AdcHandle.Init.DiscontinuousConvMode = DISABLE;//
  AdcHandle.Init.NbrOfDiscConversion = 0;
  AdcHandle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
  AdcHandle.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T1_CC1;
  AdcHandle.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  AdcHandle.Init.NbrOfConversion = 4;
  AdcHandle.Init.DMAContinuousRequests = ENABLE;
  AdcHandle.Init.EOCSelection = DISABLE;
  HAL_ADC_Init(&AdcHandle);

  /* Configure ADC regular channel */
  sConfig.Channel = ADCx_CHANNEL2;
  sConfig.Rank = 1;
  sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES;
  sConfig.Offset = 0;
  HAL_ADC_ConfigChannel(&AdcHandle, &sConfig);

   sConfig.Channel = ADCx_CHANNEL3;
sConfig.Rank = 2;
sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES;
sConfig.Offset = 0;
HAL_ADC_ConfigChannel(&AdcHandle, &sConfig);

sConfig.Channel = ADCx_CHANNEL6;
sConfig.Rank = 3;
sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES;
sConfig.Offset = 0;
HAL_ADC_ConfigChannel(&AdcHandle, &sConfig);

sConfig.Channel = ADCx_CHANNEL7;
sConfig.Rank = 4;
sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES;
sConfig.Offset = 0;
HAL_ADC_ConfigChannel(&AdcHandle, &sConfig);

  /* Start the conversion process and enable interrupt */
//  HAL_ADC_Start_DMA(&AdcHandle, (uint32_t*)&ADCConvertedValue, 1);

HAL_ADC_Start_DMA(&AdcHandle, ADC_Value_arr, 4);
}

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14个回答

左岸右岸回答时间：2015-3-23 18:42:05

没试过多通道采集呢

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feiante 回答时间：2015-2-6 08:42:10

恩，我也是用ADC DMA方式，多通道时有问题，永远都是第一个通道可以采样，好像F4和F1都是这样，F0是可以的

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feiante 回答时间：2015-2-6 08:43:54

还有就是
hdma_adc.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD; //
hdma_adc.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD
感觉应该定义为WORD的，因为HAL_ADC_Start_DMA(&AdcHandle, ADC_Value_arr, 4);中，ADC_Value_arr是uint32

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