STM32 HAL库之WDG示例代码

独立看门狗（IWDG）

初始化独立看门狗，在main.c中的 MX_IWDG_Init();，也就是iwdg.c中的初始化代码

void MX_IWDG_Init(void)
{

  /* USER CODE BEGIN IWDG_Init 0 */

  /* USER CODE END IWDG_Init 0 */

  /* USER CODE BEGIN IWDG_Init 1 */

  /* USER CODE END IWDG_Init 1 */
  hiwdg.Instance = IWDG;
  hiwdg.Init.Prescaler = IWDG_PRESCALER_32;
  hiwdg.Init.Reload = 3749;
  if (HAL_IWDG_Init(&hiwdg) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN IWDG_Init 2 */

  /* USER CODE END IWDG_Init 2 */

}

检查是否设置RCC标志，获取看门狗是否复位标志，在 stm32f1xx_hal_rcc.h 文件中

/** @brief  Check RCC flag is set or not.
  * @param  __FLAG__ specifies the flag to check.
  *          This parameter can be one of the following values:
  *            @arg @ref RCC_FLAG_HSIRDY HSI oscillator clock ready.
  *            @arg @ref RCC_FLAG_HSERDY HSE oscillator clock ready.
  *            @arg @ref RCC_FLAG_PLLRDY Main PLL clock ready.
  @if STM32F105xx
  *            @arg @ref RCC_FLAG_PLL2RDY Main PLL2 clock ready.
  *            @arg @ref RCC_FLAG_PLLI2SRDY Main PLLI2S clock ready.
  @elsif STM32F107xx
  *            @arg @ref RCC_FLAG_PLL2RDY Main PLL2 clock ready.
  *            @arg @ref RCC_FLAG_PLLI2SRDY Main PLLI2S clock ready.
  @endif
  *            @arg @ref RCC_FLAG_LSERDY LSE oscillator clock ready.
  *            @arg @ref RCC_FLAG_LSIRDY LSI oscillator clock ready.
  *            @arg @ref RCC_FLAG_PINRST  Pin reset.
  *            @arg @ref RCC_FLAG_PORRST  POR/PDR reset.
  *            @arg @ref RCC_FLAG_SFTRST  Software reset.
  *            @arg @ref RCC_FLAG_IWDGRST Independent Watchdog reset.
  *            @arg @ref RCC_FLAG_WWDGRST Window Watchdog reset.
  *            @arg @ref RCC_FLAG_LPWRRST Low Power reset.
  * @retval The new state of __FLAG__ (TRUE or FALSE).
  */
#define __HAL_RCC_GET_FLAG(__FLAG__) (((((__FLAG__) >> 5U) == CR_REG_INDEX)?   RCC->CR   : \
                                      ((((__FLAG__) >> 5U) == BDCR_REG_INDEX)? RCC->BDCR : \
                                                                              RCC->CSR)) & (1U << ((__FLAG__) & RCC_FLAG_MASK)))

stm32f1xx_hal.h中，获取系统时间戳

uint32_t HAL_GetTick(void);

喂狗函数在 stm32f1xx_hal_iwdg.h 中

/* I/O operation functions ****************************************************/
HAL_StatusTypeDef     HAL_IWDG_Refresh(IWDG_HandleTypeDef *hiwdg);

业务逻辑代码，按键触发中断，中断中喂狗，喂狗关闭LED灯，看门狗触发复位打开LED灯

Kye_EXTI.c

#include "stm32f1xx_hal.h"

extern IWDG_HandleTypeDef hiwdg;
static uint32_t lastInterruptTime = 0;
#define DEBOUNCE_DELAY 10 // 消抖时间(ms)
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{
    if (GPIO_Pin == GPIO_PIN_4)
    {
        uint32_t currentTime = HAL_GetTick();
        
        // 检查是否在消抖时间内
        if ((currentTime - lastInterruptTime) >= DEBOUNCE_DELAY)
        {
            if (HAL_GPIO_ReadPin(GPIOE,GPIO_PIN_4) == GPIO_PIN_RESET)
            {
                HAL_GPIO_WritePin(GPIOB, GPIO_PIN_5, GPIO_PIN_SET);
                HAL_IWDG_Refresh(&hiwdg);
            }
            lastInterruptTime = currentTime;
        }
    }
}

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 "iwdg.h"
#include "gpio.h"

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

/* 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 */

/* 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_IWDG_Init();
    /* USER CODE BEGIN 2 */

    /* USER CODE END 2 */

    /* Infinite loop */
    /* USER CODE BEGIN WHILE */

    if (__HAL_RCC_GET_FLAG(RCC_FLAG_IWDGRST))
    {
        // 如果是看门狗复位，则翻转LED
        HAL_GPIO_WritePin(GPIOB, GPIO_PIN_5, GPIO_PIN_RESET);

        // 清除复位标志
        __HAL_RCC_CLEAR_RESET_FLAGS();
    }
    while (1)
    {

        /* USER CODE END WHILE */

        /* USER CODE BEGIN 3 */
    }
    /* USER CODE END 3 */
}

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

    /** Initializes the RCC Oscillators according to the specified parameters
     * in the RCC_OscInitTypeDef structure.
     */
    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_HSE;
    RCC_OscInitStruct.HSEState = RCC_HSE_ON;
    RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
    RCC_OscInitStruct.HSIState = RCC_HSI_ON;
    RCC_OscInitStruct.LSIState = RCC_LSI_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();
    }
}

/* 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 */

窗口看门狗（WWDG）

初始化窗口看门狗，在main.c中 MX_WWDG_Init();，也就是wwdg.c中的初始化代码

/* WWDG init function */
void MX_WWDG_Init(void)
{

  /* USER CODE BEGIN WWDG_Init 0 */

  /* USER CODE END WWDG_Init 0 */

  /* USER CODE BEGIN WWDG_Init 1 */

  /* USER CODE END WWDG_Init 1 */
  hwwdg.Instance = WWDG;
  hwwdg.Init.Prescaler = WWDG_PRESCALER_8;
  hwwdg.Init.Window = 65;
  hwwdg.Init.Counter = 109;
  hwwdg.Init.EWIMode = WWDG_EWI_DISABLE;
  if (HAL_WWDG_Init(&hwwdg) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN WWDG_Init 2 */

  /* USER CODE END WWDG_Init 2 */

}

void HAL_WWDG_MspInit(WWDG_HandleTypeDef* wwdgHandle)
{

  if(wwdgHandle->Instance==WWDG)
  {
  /* USER CODE BEGIN WWDG_MspInit 0 */

  /* USER CODE END WWDG_MspInit 0 */
    /* WWDG clock enable */
    __HAL_RCC_WWDG_CLK_ENABLE();
  /* USER CODE BEGIN WWDG_MspInit 1 */

  /* USER CODE END WWDG_MspInit 1 */
  }
}

喂狗函数在 stm32f1xx_hal_wwdg.h 中

/* I/O operation functions ******************************************************/
HAL_StatusTypeDef     HAL_WWDG_Refresh(WWDG_HandleTypeDef *hwwdg);

业务逻辑代码，按键触发中断，中断中喂狗，喂狗关闭LED灯，看门狗触发复位打开LED灯，

Key.c

#include "stm32f1xx_hal.h"

extern WWDG_HandleTypeDef hwwdg;
static uint32_t time_temp = 0;
#define time_ois 10

void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{
    if (GPIO_Pin == GPIO_PIN_4) {
        uint32_t currentTime = HAL_GetTick();
        if ((currentTime-time_temp) > time_ois)
        {
            if(HAL_GPIO_ReadPin(GPIOE, GPIO_PIN_4) == GPIO_PIN_RESET)
            {
                HAL_GPIO_WritePin(GPIOB, GPIO_PIN_5, GPIO_PIN_SET);
                HAL_WWDG_Refresh(&hwwdg);
            }
        }
        time_temp = currentTime;
    }
}

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 "wwdg.h"
#include "gpio.h"

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

/* 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 */

/* 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_WWDG_Init();
    /* USER CODE BEGIN 2 */

    /* USER CODE END 2 */

    /* Infinite loop */
    /* USER CODE BEGIN WHILE */

    if (__HAL_RCC_GET_FLAG(RCC_FLAG_WWDGRST))
    {
        HAL_GPIO_WritePin(GPIOB, GPIO_PIN_5, GPIO_PIN_RESET);
        // 清除复位标志
        __HAL_RCC_CLEAR_RESET_FLAGS();
    }

    while (1)
    {
        /* USER CODE END WHILE */

        /* USER CODE BEGIN 3 */
    }
    /* USER CODE END 3 */
}

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

/* 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 */