stm32fo30f4 怎么配置成 PA0读取

gongpeng192

void ADC1_DMA_Init(void)
{
  ADC_InitTypeDef     ADC_InitStruct;
  DMA_InitTypeDef     DMA_InitStruct;
GPIO_InitTypeDef    GPIO_InitStruct;
 /* ADC1 DeInit */  
  ADC_DeInit(ADC1);//ADC1???è?????÷??????

/* Enable  GPIOA clock */
 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);//????GPIOA
  /* ADC1 Periph clock enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);//????ADC1?±??
  /* DMA1 clock enable */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1 , ENABLE);//????DMA1?±??

  /* Configure PA.01  as analog input */
  GPIO_InitStruct.GPIO_Pin = GPIO_Pin_1;
  GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL ;
  GPIO_Init(GPIOA, &GPIO_InitStruct); // ????PA1

 
  /* DMA1 Channel1 Config */  //DMA1  ?¨??1????
  DMA_DeInit(DMA1_Channel1);
  DMA_InitStruct.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_Address;//ADC1???·????
  DMA_InitStruct.DMA_MemoryBaseAddr = (uint32_t)&RegularConvData_Tab;
  DMA_InitStruct.DMA_DIR = DMA_DIR_PeripheralSRC;
  DMA_InitStruct.DMA_BufferSize =4;
  DMA_InitStruct.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  DMA_InitStruct.DMA_MemoryInc = DMA_MemoryInc_Enable;
  DMA_InitStruct.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
  DMA_InitStruct.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
  DMA_InitStruct.DMA_Mode = DMA_Mode_Circular;
  DMA_InitStruct.DMA_Priority = DMA_Priority_High;
  DMA_InitStruct.DMA_M2M = DMA_M2M_Disable;
  DMA_Init(DMA1_Channel1, &DMA_InitStruct);
  
  /* DMA1 Channel1 enable */    //DMA1  ?¨??1????
  DMA_Cmd(DMA1_Channel1, ENABLE);
  
//   /* ADC DMA request in circular mode */  //ADC_DMA ???·????
  ADC_DMARequestModeConfig(ADC1, ADC_DMAMode_Circular);
  
  /* Enable ADC_DMA */    //????ADC_DMA
  ADC_DMACmd(ADC1, ENABLE);  
  
  /* Initialize ADC structure */
  ADC_StructInit(&ADC_InitStruct);//ADC?á????   ??????
  
  /* Configure the ADC1 in continous mode withe a resolutuion equal to 12 bits  */

  ADC_InitStruct.ADC_Resolution = ADC_Resolution_12b;  //ADC  12??×???????
  ADC_InitStruct.ADC_ContinuousConvMode = ENABLE;    //AD????×???????
  ADC_InitStruct.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
  ADC_InitStruct.ADC_DataAlign = ADC_DataAlign_Right;
  ADC_InitStruct.ADC_ScanDirection = ADC_ScanDirection_Backward;
  ADC_Init(ADC1, &ADC_InitStruct); 
 
//   /* 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_1  , ADC_SampleTime_55_5Cycles); 
//   ADC_VrefintCmd(ENABLE);
  
  /* ADC Calibration */
  ADC_GetCalibrationFactor(ADC1);
   ADC_DMACmd(ADC1, ENABLE);
  /* 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);//Start Conversion for the selected ADC channels.
}

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