STM32

STM32F030R8T6单片机ADC采样问题

2019-07-14 18:36发布

站内问答 / STM32/STM8
1363 3 908
我使用的是STM32F030R8T6单片机，在进行AD采样时，只是把例程中的IO口换了一下，ADC就不能正常工作了，是哪里出了问题，请指教
#include "adc.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define ADC1_DR_Address                0x40012440
__IO uint16_t RegularConvData_Tab;
void ADC1_DMA_Init(void)
{
  ADC_InitTypeDef     ADC_InitStruct;
  DMA_InitTypeDef     DMA_InitStruct;
        GPIO_InitTypeDef    GPIO_InitStruct;
          /* ADC1 DeInit */  
  ADC_DeInit(ADC1);

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

  /* 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);                                // PC1,输入时不用设置速率


  /* DMA1 Channel1 Config */
  DMA_DeInit(DMA1_Channel1);
  DMA_InitStruct.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_Address;
  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 */
  DMA_Cmd(DMA1_Channel1, ENABLE);

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

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

  /* Initialize ADC structure */
  ADC_StructInit(&ADC_InitStruct);

  /* Configure the ADC1 in continous mode withe a resolutuion equal to 12 bits  */
  ADC_InitStruct.ADC_Resolution = ADC_Resolution_12b;
  ADC_InitStruct.ADC_ContinuousConvMode = ENABLE;
  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);
}
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3条回答
longgs
2019-07-15 04:42
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