求问，STM32L151RDT6多通道采用的是ADC+DMA方式，但是驱动不起来是什么原因？

只看该作者 · 2023-12-20 11:36

以下为具体程序代码，求大神解答

void AD_Configuration(void)
{
      DMA_InitTypeDef DMA_InitStructure;
      GPIO_InitTypeDef GPIO_InitStructure;
      ADC_InitTypeDef ADC_InitStructure;

      /*Enable DMA1 Clock*/
      RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

      /*DMA1 Channel1 Configuration*/
      DMA_DeInit(DMA1_Channel1);
      DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_ADDRESS;
      DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)ADC_ConvertedValue;
      DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
      DMA_InitStructure.DMA_BufferSize = 2;
      DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
      DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
      DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
      DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
      DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
      DMA_InitStructure.DMA_Priority = DMA_Priority_High;
      DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
      DMA_Init(DMA1_Channel1, &DMA_InitStructure);

      /*ENABLE DMA1 CHANNEL1*/
      DMA_Cmd(DMA1_Channel1, ENABLE);

      /*------------ADC1 configuration with DMA enabled---------*/
      /*Enable the HSI oscillator*/
      RCC_HSICmd(ENABLE);

      /*Enable GPIOA Clock*/
      RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);

      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
      GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
      GPIO_Init(GPIOA, &GPIO_InitStructure);

      /*Check that HSI oscillator is ready*/
      while(RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET);

      RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
      ADC_DeInit(ADC1);
      ADC_InitStructure.ADC_ScanConvMode = ENABLE;
      ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
      ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
      ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
      ADC_InitStructure.ADC_NbrOfConversion = 2;
      ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
      ADC_Init(ADC1, &ADC_InitStructure);

      /*ADC1 regular channel10 configuration*/
      ADC_RegularChannelConfig(ADC1, ADC_Channel_5, 1, ADC_SampleTime_48Cycles);
      ADC_RegularChannelConfig(ADC1, ADC_Channel_6, 2, ADC_SampleTime_48Cycles);

      ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE);

      //Enable ADC1 DMA
      ADC_DMACmd(ADC1, ENABLE);

      //Enable ADC1
      ADC_Cmd(ADC1, ENABLE);

      /*Wait until the ADC1 is ready*/
      while(ADC_GetFlagStatus(ADC1, ADC_FLAG_ADONS) == RESET);

      /*Start ADC1 Software Conversion*/
      ADC_SoftwareStartConv(ADC1);
}
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