set(LINKER_FLAGS "-u _printf_float")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${LINKER_FLAGS}")

int __io_putchar(int ch)
{
    HAL_UART_Transmit(&huart1, (uint8_t *)&ch, 1, HAL_MAX_DELAY);
    return ch;
}

float temp_trans(uint16_t adc_value)
{
    float Vref = 3.3f;
    float R_fixed = 10000.0f;
    float T0 = 298.15f;         // 25°C in Kelvin
    float B = 3435.0f;
    float R0 = 10000.0f;        // NTC 25°C 电阻
    float Ka = 273.15f;

    float Vout = ((float)adc_value / 4095.0f) * Vref;

    
    float R_ntc = R_fixed * (Vout / (Vref - Vout));

    float tempK = 1.0f / (1.0f / T0 + log(R_ntc / R0) / B);
    float tempC = tempK - Ka;

    return tempC;
}

/* 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"
#include "stdio.h"
#include <math.h>


extern ADC_HandleTypeDef hadc1;

void SystemClock_Config(void);

int __io_putchar(int ch)
{
    HAL_UART_Transmit(&huart1, (uint8_t *)&ch, 1, HAL_MAX_DELAY);
    return ch;
}


float temp_trans(uint16_t adc_value)
{
    float Vref = 3.3f;
    float R_fixed = 10000.0f;
    float T0 = 298.15f;         // 25°C in Kelvin
    float B = 3435.0f;
    float R0 = 10000.0f;        // NTC 25°C 电阻
    float Ka = 273.15f;

    float Vout = ((float)adc_value / 4095.0f) * Vref;

    // 使用正确的分压公式推导
    float R_ntc = R_fixed * (Vout / (Vref - Vout));

    float tempK = 1.0f / (1.0f / T0 + log(R_ntc / R0) / B);
    float tempC = tempK - Ka;

    return tempC;
}

/* USER CODE END 0 */

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

 
  HAL_Init();

  
  SystemClock_Config();

  MX_GPIO_Init();
  MX_ADC1_Init();
  MX_USART1_UART_Init();
 

    while (1) {
        HAL_ADC_Start(&hadc1);
        HAL_ADC_PollForConversion(&hadc1, HAL_MAX_DELAY);
        uint32_t adcValue = HAL_ADC_GetValue(&hadc1);

        float tempC = temp_trans(adcValue);
        printf("ADC: %lu, Temp: %.2f °C\r\n", adcValue, tempC);

        HAL_Delay(1000);
    }

}


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 */

/* 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 */