STM32CubeMX-ADC配置

我们提供了电池电量检测电路，利用一路ADC进行检测电池电量。我们使用的是PC4口，对应的是ADC1的14通道。

进入Configuartion，点击ADC1

 

进行ADC1配置

 

使用DMA

 

开启中断

 

电压值计算

我们使用的控制器的ADC为12位精度，基准电压为3.3V。根据采集到的值转换为电压值的计算公式如下：

V=Value*3300/2¹²；

void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef *hadc)

{

    uint16_t battery = 0;

    battery = uhADCxConvertedValue * 3300 / 4095;

    OLED_Battery(battery);

}

源码

/* Includes ------------------------------------------------------------------*/

#include "adc.h"

#include "gpio.h"

#include "dma.h"

 

/* USER CODE BEGIN 0 */

extern __IO uint16_t uhADCxConvertedValue;

/* USER CODE END 0 */

 

ADC_HandleTypeDef hadc1;

DMA_HandleTypeDef hdma_adc1;

 

/* ADC1 init function */

void MX_ADC1_Init(void)

{

  ADC_ChannelConfTypeDef sConfig;

    /**Common config

    */

  hadc1.Instance = ADC1;

  hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE;

  hadc1.Init.ContinuousConvMode = DISABLE;

  hadc1.Init.DiscontinuousConvMode = DISABLE;

  hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;

  hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;

  hadc1.Init.NbrOfConversion = 1;

  HAL_ADC_Init(&hadc1);

 

    /**Configure Regular Channel

    */

  sConfig.Channel = ADC_CHANNEL_14;

  sConfig.Rank = 1;

  sConfig.SamplingTime = ADC_SAMPLETIME_1CYCLE_5;

  HAL_ADC_ConfigChannel(&hadc1, &sConfig);

}

 

void HAL_ADC_MspInit(ADC_HandleTypeDef* hadc)

{

  GPIO_InitTypeDef GPIO_InitStruct;

  if(hadc->Instance==ADC1)

  {

  /* USER CODE BEGIN ADC1_MspInit 0 */

 

  /* USER CODE END ADC1_MspInit 0 */

    /* Peripheral clock enable */

    __ADC1_CLK_ENABLE();

  

    /**ADC1 GPIO Configuration    

    PC4     ------> ADC1_IN14

    */

    GPIO_InitStruct.Pin = GPIO_PIN_4;

    GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;

HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

 

    /* Peripheral DMA init*/

    hdma_adc1.Instance = DMA1_Channel1;

    hdma_adc1.Init.Direction = DMA_PERIPH_TO_MEMORY;

    hdma_adc1.Init.PeriphInc = DMA_PINC_DISABLE;

    hdma_adc1.Init.MemInc = DMA_MINC_ENABLE;

    hdma_adc1.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;

    hdma_adc1.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;

    hdma_adc1.Init.Mode = DMA_NORMAL;

    hdma_adc1.Init.Priority = DMA_PRIORITY_LOW;

    HAL_DMA_Init(&hdma_adc1);

 

    __HAL_LINKDMA(hadc,DMA_Handle,hdma_adc1);

 

    /* Peripheral interrupt init*/

    HAL_NVIC_SetPriority(ADC1_2_IRQn, 0, 0);

    HAL_NVIC_EnableIRQ(ADC1_2_IRQn);

  /* USER CODE BEGIN ADC1_MspInit 1 */

  /* USER CODE END ADC1_MspInit 1 */

  }

}

 

void HAL_ADC_MspDeInit(ADC_HandleTypeDef* hadc)

{

 

  if(hadc->Instance==ADC1)

  {

  /* USER CODE BEGIN ADC1_MspDeInit 0 */

 

  /* USER CODE END ADC1_MspDeInit 0 */

    /* Peripheral clock disable */

    __ADC1_CLK_DISABLE();

  

    /**ADC1 GPIO Configuration    

    PC4     ------> ADC1_IN14

    */

    HAL_GPIO_DeInit(GPIOC, GPIO_PIN_4);

 

    /* Peripheral DMA DeInit*/

    HAL_DMA_DeInit(hadc->DMA_Handle);

 

    /* Peripheral interrupt Deinit*/

    HAL_NVIC_DisableIRQ(ADC1_2_IRQn);

 

  }

  /* USER CODE BEGIN ADC1_MspDeInit 1 */

 

  /* USER CODE END ADC1_MspDeInit 1 */

}

 

/* USER CODE BEGIN 1 */

void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)

{

uint16_t battery=0;

battery=uhADCxConvertedValue*3300/4095;

OLED_Battery(battery);

}

 

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/