蓝桥杯嵌入式（STM32G431RBT6）扩展板——光敏电阻

1.原理图

2.CUbemx配置

3.代码

（1）dadc.c

#include "dadc.h"
double getADC(ADC_HandleTypeDef *pin)
{
   
    unsigned int value;
    //开启ADC
    HAL_ADC_Start(pin);
    
    //获取ADC的值
    value=HAL_ADC_GetValue(pin);
    
    //12位精度即4096
    //4096就代表3.3V
    return value*(3.3/4096);
}

(2)dadc.h

#ifndef __DADC_H__
#define __DADC_H__

#include "main.h"
double getADC(ADC_HandleTypeDef *pin);



#endif

(3)main.c

/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2024 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.
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "adc.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */


#include "lcd.h"
#include "led.h"
#include "dadc.h"
#<