野火 STM32 ADC多通道采集

只看该作者 · 2013-12-24 18:35

使用多通道采样DMA传输的时候怎么只有一个通道的数据之正确的
这是为什么呢？哪位大虾指点一下

只看该作者 · 2013-12-24 19:53

贴你的配置程序，肯定是你没有配置好

只看该作者 · 2013-12-24 20:44

将你的设置让大家看一看之后才能谈指导没有原料如何做菜

1万 · 2014-1-28 08:50

我的也是

1万 · 2014-1-28 08:51

  ADC_InitTypeDef ADC_InitStructure;
  DMA_InitTypeDef DMA_InitStructure;
GPIO_InitTypeDef  GPIO_InitStruct;

/* ADC1 DeInit */
  ADC_DeInit(ADC1);

  /* ADC1 Periph clock enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);

  /* DMA1 clock enable */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1 , ENABLE);

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);

/*Config adio input*/
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AN;
  GPIO_InitStruct.GPIO_PuPd  = GPIO_PuPd_NOPULL;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_Level_1;
GPIO_Init(GPIOA, &GPIO_InitStruct);

  /* DMA1 Channel1 Config */
  DMA_DeInit(DMA1_Channel1);
  DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_Address;
  DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)RegularConvData_Tab;
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
  DMA_InitStructure.DMA_BufferSize = 3;
  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);

  /* DMA1 Channel1 enable */
  DMA_Cmd(DMA1_Channel1, ENABLE);

  /* ADC DMA request in circular mode */
  ADC_DMARequestModeConfig(ADC1, ADC_DMAMode_Circular);

  /* Enable ADC_DMA */
  ADC_DMACmd(ADC1, ENABLE);

  /* Configure the ADC1 in continous mode withe a resolutuion equal to 12 bits  */
  ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
  ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
  ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
  ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Backward;
  ADC_Init(ADC1, &ADC_InitStructure);

RCC_ADCCLKConfig(RCC_ADCCLK_HSI14);

/*  Convert the adc DC_IN whith 55.5 Cycles as sampling time*/
ADC_ChannelConfig(ADC1, ADC_Channel_5 , ADC_SampleTime_239_5Cycles);

/*  Convert the adc DC_4.5V whith 55.5 Cycles as sampling time*/
ADC_ChannelConfig(ADC1, ADC_Channel_6 , ADC_SampleTime_239_5Cycles);

/*  Convert the adc Battery whith 55.5 Cycles as sampling time*/
ADC_ChannelConfig(ADC1, ADC_Channel_7 , ADC_SampleTime_239_5Cycles);

  /* Convert the ADC1 temperature sensor  with 55.5 Cycles as sampling time */
  //ADC_ChannelConfig(ADC1, ADC_Channel_TempSensor , ADC_SampleTime_55_5Cycles);
  //ADC_TempSensorCmd(ENABLE);

  /* Convert the ADC1 Vref  with 55.5 Cycles as sampling time */
  //ADC_ChannelConfig(ADC1, ADC_Channel_Vrefint , ADC_SampleTime_55_5Cycles);
  //ADC_VrefintCmd(ENABLE);

/* Convert the ADC1 Vbat  with 55.5 Cycles as sampling time */
  //ADC_ChannelConfig(ADC1, ADC_Channel_Vbat , ADC_SampleTime_55_5Cycles);
//ADC_VbatCmd(ENABLE);

  /* ADC Calibration */
  ADC_GetCalibrationFactor(ADC1);

  /* Enable ADC1 */
  ADC_Cmd(ADC1, ENABLE);

  /* Wait the ADCEN falg */
  while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_ADEN));

  /* ADC1 regular Software Start Conv */
  ADC_StartOfConversion(ADC1);