標(biāo)題: stm32f030 adc的值一直為0 [打印本頁(yè)]

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作者: yfl236415    時(shí)間: 2017-11-27 11:27
標(biāo)題: stm32f030 adc的值一直為0
#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();
  }


根據(jù)自帶的例子  運(yùn)行之后aADCxConvertedData    這個(gè)adc 的值一直為0   請(qǐng)各位大大看看什么問題   

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