mini7_V2/Core/Src/adc.c

/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file    adc.c
  * @brief   This file provides code for the configuration
  *          of the ADC instances.
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2026 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */
	
#include "math.h"
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "adc.h"

/* USER CODE BEGIN 0 */

#define ADC1_CHANNEL_COUNT    2      //
#define ADC_SAMPLING_TIMES    10     // 

uint16_t ADC1_Converted_Value[ADC1_CHANNEL_COUNT * ADC_SAMPLING_TIMES];
/* USER CODE END 0 */

ADC_HandleTypeDef hadc1;
DMA_HandleTypeDef hdma_adc1;

/* ADC1 init function */
void MX_ADC1_Init(void)
{

  /* USER CODE BEGIN ADC1_Init 0 */

  /* USER CODE END ADC1_Init 0 */

  ADC_ChannelConfTypeDef sConfig = {0};

  /* USER CODE BEGIN ADC1_Init 1 */

  /* USER CODE END ADC1_Init 1 */

  /** Common config
  */
  hadc1.Instance = ADC1;
  hadc1.Init.ScanConvMode = ADC_SCAN_ENABLE;
  hadc1.Init.ContinuousConvMode = ENABLE;
  hadc1.Init.DiscontinuousConvMode = DISABLE;
  hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
  hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc1.Init.NbrOfConversion = 2;
  if (HAL_ADC_Init(&hadc1) != HAL_OK)
  {
    Error_Handler();
  }

  /** Configure Regular Channel
  */
  sConfig.Channel = ADC_CHANNEL_12;
  sConfig.Rank = ADC_REGULAR_RANK_1;
  sConfig.SamplingTime = ADC_SAMPLETIME_28CYCLES_5;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }

  /** Configure Regular Channel
  */
  sConfig.Channel = ADC_CHANNEL_13;
  sConfig.Rank = ADC_REGULAR_RANK_2;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN ADC1_Init 2 */
  HAL_ADC_Stop_DMA(&hadc1);
  /* USER CODE END ADC1_Init 2 */

}

void HAL_ADC_MspInit(ADC_HandleTypeDef* adcHandle)
{

  GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(adcHandle->Instance==ADC1)
  {
  /* USER CODE BEGIN ADC1_MspInit 0 */

  /* USER CODE END ADC1_MspInit 0 */
    /* ADC1 clock enable */
    __HAL_RCC_ADC1_CLK_ENABLE();

    __HAL_RCC_GPIOC_CLK_ENABLE();
    /**ADC1 GPIO Configuration
    PC2     ------> ADC1_IN12
    PC3     ------> ADC1_IN13
    */
    GPIO_InitStruct.Pin = GPIO_PIN_2|GPIO_PIN_3;
    GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
    HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

    /* ADC1 DMA Init */
    /* ADC1 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_HALFWORD;
    hdma_adc1.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
    hdma_adc1.Init.Mode = DMA_CIRCULAR;
    hdma_adc1.Init.Priority = DMA_PRIORITY_LOW;
    if (HAL_DMA_Init(&hdma_adc1) != HAL_OK)
    {
      Error_Handler();
    }

    __HAL_LINKDMA(adcHandle,DMA_Handle,hdma_adc1);

  /* USER CODE BEGIN ADC1_MspInit 1 */

  /* USER CODE END ADC1_MspInit 1 */
  }
}

void HAL_ADC_MspDeInit(ADC_HandleTypeDef* adcHandle)
{

  if(adcHandle->Instance==ADC1)
  {
  /* USER CODE BEGIN ADC1_MspDeInit 0 */

  /* USER CODE END ADC1_MspDeInit 0 */
    /* Peripheral clock disable */
    __HAL_RCC_ADC1_CLK_DISABLE();

    /**ADC1 GPIO Configuration
    PC2     ------> ADC1_IN12
    PC3     ------> ADC1_IN13
    */
    HAL_GPIO_DeInit(GPIOC, GPIO_PIN_2|GPIO_PIN_3);

    /* ADC1 DMA DeInit */
    HAL_DMA_DeInit(adcHandle->DMA_Handle);
  /* USER CODE BEGIN ADC1_MspDeInit 1 */

  /* USER CODE END ADC1_MspDeInit 1 */
  }
}

/* USER CODE BEGIN 1 */

void ADC_Inner_start(void)
{
  HAL_ADC_Stop_DMA(&hadc1);
  HAL_Delay(10);
  HAL_StatusTypeDef ret; 
   ret = HAL_ADC_Start_DMA(&hadc1, (uint32_t*)ADC1_Converted_Value, ADC1_CHANNEL_COUNT * ADC_SAMPLING_TIMES);
   if(ret)
   {
	 Error_Handler();
   }
}
float getADC_Chanel_value(unsigned int ch){
 	unsigned int max; 
	unsigned int min;
	unsigned int sum; 
	if(ch < ADC1_CHANNEL_COUNT){
		max = ADC1_Converted_Value[0];
		min = ADC1_Converted_Value[0];
		sum = ADC1_Converted_Value[0];
		for(unsigned int i=1;i<ADC_SAMPLING_TIMES;i++){
			if(max < ADC1_Converted_Value[i*ADC1_CHANNEL_COUNT+ch])max=ADC1_Converted_Value[i*ADC1_CHANNEL_COUNT+ch];
			if(min > ADC1_Converted_Value[i*ADC1_CHANNEL_COUNT+ch])min=ADC1_Converted_Value[i*ADC1_CHANNEL_COUNT+ch];
			sum +=  ADC1_Converted_Value[i*ADC1_CHANNEL_COUNT+ch];			
		}
	}
	sum -= min;
	sum -= max;
	sum = sum/(ADC_SAMPLING_TIMES - 2);
	
	 float Rt=0;          //NTC电阻
   float R=10000;       //10K固定阻值电阻
   float T0=273.15+25;  //转换为开尔文温度
   float B=3980;        //B值 >50°
   float Ka=273.15;     //K值
   float temp;
   float VR=0;   //电压值
   float NTCVoltage=0;   //电压值
	
	 NTCVoltage=(sum*3300/4096);
   VR=NTCVoltage/1000.00;
   Rt=10000*VR/(3.3-VR);
   temp=1/(1/T0+log(Rt/R)/B)-Ka; //计算温度
	
	
	
	return temp;
}
/* USER CODE END 1 */