1、实验原理 
温度的变化引起电压的变化，通过测量当前电压值换算为温度值。 
2、实验内容 
利用 ADC 获取电压，并转换为当前温度值，在ST7789 驱动的 SPI TFT LCD 屏幕上显示温度。

ST7789 驱动的 SPI TFT LCD 屏幕的驱动在：STM32F103RCT6在ST7789 驱动的 SPI TFT LCD 屏幕上显示PWM占空比里面找https://blog.csdn.net/weixin_46406816/article/details/153734837?sharetype=blogdetail&sharerId=153734837&sharerefer=PC&sharesource=weixin_46406816&spm=1011.2480.3001.8118

3、配置完全参考：STM32F103RCT6+ADC测板载温度并输出到串口显示：https://blog.csdn.net/weixin_46406816/article/details/153734920?sharetype=blogdetail&sharerId=153734920&sharerefer=PC&sharesource=weixin_46406816&spm=1011.2480.3001.8118

4、屏幕的驱动需要复制过来到E:\CubeMX\pwm_lcd\Core下面的文件夹，头文件和.c都要复制

5、main.c

/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2025 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 "usart.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include <stdio.h>
#include "GUI.h"
#include "Lcd_Driver.h"
/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */

/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */
uint32_t value;
double value_vol;
double Temp;
/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{

  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_USART1_UART_Init();
  MX_ADC1_Init();
  /* USER CODE BEGIN 2 */
	Lcd_Init();
	Lcd_Clear(GRAY0);
	Gui_DrawFont_GBK24(0, 30, RED, GRAY0, (u8*)"2025/10/23");      // 日期
	Gui_DrawFont_GBK24(0, 55, RED, GRAY0, (u8*)"2025000000");      // 学号
	Gui_DrawFont_GBK16(0, 85, RED, GRAY0, (u8*)"NAME");            // 姓名
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
		char temp_buf[32];   // 用于格式化温度字符串
		if(HAL_ADC_Start (&hadc1)==HAL_OK )
		{
			if(HAL_ADC_PollForConversion(&hadc1,10) == HAL_OK )
			{
				value=HAL_ADC_GetValue(&hadc1);
				value_vol = (double)value*3.3/4095;
				Temp = (1.43-value_vol)/0.0043+25;
				printf ("Temp:%.2f\r\n",Temp);
				
				// LCD 显示温度（只更新这一行）
        sprintf(temp_buf, "Temp: %.2f C", Temp);
        Gui_DrawFont_GBK24(0, 110, RED, GRAY0, (u8*)temp_buf);
			 }
			else 
			{
				printf ("no completed!\r\n");
				Gui_DrawFont_GBK24(0, 110, RED, GRAY0, (u8*)"ADC Error");
			}
			
		}
		else 
		{
			printf ("no start!\r\n");
			Gui_DrawFont_GBK24(0, 110, RED, GRAY0, (u8*)"Start Fail");
		}
		HAL_Delay (2000);// 每2秒更新一次
  }
  /* USER CODE END 3 */
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
  RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
  {
    Error_Handler();
  }
  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_ADC;
  PeriphClkInit.AdcClockSelection = RCC_ADCPCLK2_DIV6;
  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
  {
    Error_Handler();
  }
}

/* USER CODE BEGIN 4 */
int fputc(int ch,FILE *f)
{
	HAL_UART_Transmit (&huart1,(uint8_t *)&ch,1,HAL_MAX_DELAY );
	return ch;
}

int fgetc(FILE *f)
{
	uint8_t ch;
	HAL_UART_Receive (&huart1,(uint8_t *)&ch,1,HAL_MAX_DELAY );
	return ch;
}
/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */
  __disable_irq();
  while (1)
  {
  }
  /* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

6、烧录，可看到，每隔2s更新一次温度