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);
        }