stm32f030 adc的值一直为0

ID:254078 · 发表于 2017-11-27 11:27

#include "batt_adc.h"

extern void Error_Handler(void);
/* Variable containing ADC conversions data */
extern uint16_t aADCxConvertedData[ADC_CONVERTED_DATA_BUFFER_SIZE];
/* ADC handle declaration */

/* ADC channel configuration structure declaration */
ADC_ChannelConfTypeDef       sConfig;

void BATT_ADC_Init(void)
{
ADC_HandleTypeDef          AdcHandle;
GPIO_InitTypeDef  GPIO_InitStruct;
      __HAL_RCC_ADC1_CLK_ENABLE();
      __HAL_RCC_GPIOA_CLK_ENABLE();


      GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
      GPIO_InitStruct.Pull = GPIO_NOPULL;
      GPIO_InitStruct.Pin  = ADCx_CHANNEL_PIN;
      HAL_GPIO_Init(ADCx_CHANNEL_GPIO_PORT, &GPIO_InitStruct);


AdcHandle.Instance       = ADCx;
  if (HAL_ADC_DeInit(&AdcHandle) != HAL_OK)
  {
/* ADC de-initialization Error */
Error_Handler();
  }

  AdcHandle.Init.ClockPrescaler       = ADC_CLOCK_SYNC_PCLK_DIV4;    /* Synchronous clock mode, input ADC clock with prscaler 2 */

  AdcHandle.Init.Resolution          = ADC_RESOLUTION_12B;          /* 12-bit resolution for converted data */
  AdcHandle.Init.DataAlign          = ADC_DATAALIGN_RIGHT;          /* Right-alignment for converted data */
  AdcHandle.Init.ScanConvMode       = ADC_SCAN_DIRECTION_FORWARD; /* Sequencer disabled (ADC conversion on only 1 channel: channel set on rank 1) */
  AdcHandle.Init.EOCSelection       = ADC_EOC_SINGLE_CONV;          /* EOC flag picked-up to indicate conversion end */
  AdcHandle.Init.LowPowerAutoPowerOff  = DISABLE;
  AdcHandle.Init.LowPowerAutoWait    = DISABLE;                      /* Auto-delayed conversion feature disabled */
  AdcHandle.Init.ContinuousConvMode = ENABLE;                      /* Continuous mode enabled (automatic conversion restart after each conversion) */
  AdcHandle.Init.DiscontinuousConvMode = DISABLE;                      /* Parameter discarded because sequencer is disabled */
  AdcHandle.Init.ExternalTrigConv    = ADC_SOFTWARE_START;          /* Software start to trig the 1st conversion manually, without external event */
  AdcHandle.Init.ExternalTrigConvEdge  = ADC_EXTERNALTRIGCONVEDGE_NONE; /* Parameter discarded because software trigger chosen */
  AdcHandle.Init.DMAContinuousRequests = ENABLE;                      /* ADC DMA continuous request to match with DMA circular mode */
  AdcHandle.Init.Overrun             = ADC_OVR_DATA_OVERWRITTEN;    /* DR register is overwritten with the last conversion result in case of overrun */
  AdcHandle.Init.SamplingTimeCommon = ADC_SAMPLETIME_239CYCLES_5;


  /* Initialize ADC peripheral according to the passed parameters */
  if (HAL_ADC_Init(&AdcHandle) != HAL_OK)
  {
Error_Handler();
  }

  /* ### - 2 - Start calibration ############################################ */
  if (HAL_ADCEx_Calibration_Start(&AdcHandle) != HAL_OK)
  {
Error_Handler();
  }

  /* ### - 3 - Channel configuration ######################################## */
  sConfig.Channel    = ADCx_CHANNEL;             /* Channel to be converted */
  sConfig.Rank       = ADC_RANK_CHANNEL_NUMBER;
  if (HAL_ADC_ConfigChannel(&AdcHandle, &sConfig) != HAL_OK)
  {
Error_Handler();
  }

  /* ### - 4 - Start conversion in DMA mode ################################# */
  if (HAL_ADC_Start_DMA(&AdcHandle,
                     (uint32_t *)aADCxConvertedData,
                     ADC_CONVERTED_DATA_BUFFER_SIZE
                     ) != HAL_OK)
  {
Error_Handler();
  }

根据自带的例子  运行之后aADCxConvertedData 这个adc 的值一直为0 请各位大大看看什么问题

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