STM32F405的内部ADC采集

1. ADC的初始化部分基本一致，下面是引脚复用配置

void HAL_ADC_MspInit(ADC_HandleTypeDef *hadc)
{
  GPIO_InitTypeDef          GPIO_InitStruct;
//  static DMA_HandleTypeDef  hdma_adc;

  /*##-1- Enable peripherals and GPIO Clocks #################################*/
  /* ADC1 Periph clock enable */
  ADCx_CLK_ENABLE();
  /* Enable GPIO clock ****************************************/
  ADCx_CHANNEL_GPIO_CLK_ENABLE();
  /* Enable DMA2 clock */
//  DMAx_CLK_ENABLE();

  /*##-2- Configure peripheral GPIO ##########################################*/
  /* ADC Channel GPIO pin configuration */
  GPIO_InitStruct.Pin = ADCx_CHANNEL_PIN;
  GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(ADCx_CHANNEL_GPIO_PORT, &GPIO_InitStruct);
}

2. 下面是功能初始化

void adc_ac712_init(void)
{
    ADC_ChannelConfTypeDef sConfig;
/*##-1- Configure the ADC peripheral #######################################*/
  AdcHandle.Instance                   = ADCx;
  AdcHandle.Init.ClockPrescaler        = ADC_CLOCKPRESCALER_PCLK_DIV4;
  AdcHandle.Init.Resolution            = ADC_RESOLUTION_12B;
  AdcHandle.Init.ScanConvMode          = DISABLE;                       /* Sequencer disabled (ADC conversion on only 1 channel: channel set on rank 1) */
  AdcHandle.Init.ContinuousConvMode    = ENABLE;                        /* Continuous mode disabled to have only 1 conversion at each conversion trig */
  AdcHandle.Init.DiscontinuousConvMode = DISABLE;                       /* Parameter discarded because sequencer is disabled */
  AdcHandle.Init.NbrOfDiscConversion   = 0;
  AdcHandle.Init.ExternalTrigConvEdge  = ADC_EXTERNALTRIGCONVEDGE_NONE;        /* Conversion start trigged at each external event */
  AdcHandle.Init.ExternalTrigConv      = ADC_EXTERNALTRIGCONV_T1_CC1;
  AdcHandle.Init.DataAlign             = ADC_DATAALIGN_RIGHT;
  AdcHandle.Init.NbrOfConversion       = 1;
  AdcHandle.Init.DMAContinuousRequests = DISABLE;
  AdcHandle.Init.EOCSelection          = DISABLE;

  if (HAL_ADC_Init(&AdcHandle) != HAL_OK)
  {
    /* ADC initialization Error */
    //Error_Handler();
  }

  /*##-2- Configure ADC regular channel ######################################*/
  sConfig.Channel      = ADC_CHANNEL_1;
  sConfig.Rank         = 1;
  sConfig.SamplingTime = ADC_SAMPLETIME_3CYCLES;
  sConfig.Offset       = 0;
  if (HAL_ADC_ConfigChannel(&AdcHandle, &sConfig) != HAL_OK)
  {
    /* Channel Configuration Error */
    //Error_Handler();
  }

  /*##-3- Start the conversion process #######################################*/
  if (HAL_ADC_Start(&AdcHandle) != HAL_OK)
  {
    /* Start Conversation Error */
    //Error_Handler();
  }
}

3.  ADC的数据采集有3中方式，中断，DMA，正常查询模式，下面是正常查询模式的代码

        HAL_ADC_PollForConversion(&AdcHandle, 10);
        //if(HAL_ADC_GetState(&AdcHandle) == HAL_ADC_STATE_EOC_REG)
        if((HAL_ADC_GetState(&AdcHandle) & HAL_ADC_STATE_EOC_REG) == HAL_ADC_STATE_EOC_REG)
        {
            /*##-5- Get the converted value of channel ##*/
            uhADCxConvertedValue = HAL_ADC_GetValue(&AdcHandle);
        }