[HAL库学习之路]6.WWDG-窗口看门狗

记录自己的STM32的HAL库的学习之路，不定期更新…

一、Pinout

二、Clock Configuration

三、Configuration

配置GPIO

配置WWDG

配置NVIC

超时时间:

T=4096∗Prescaler∗(T[5:0]+1)/Fpclk

Prescaler为WWDG的预分频系数，Fpclk为APB1时钟，T[5:0]为窗口看门狗的计数器低6位。

四、Generate Code

代码
窗口看门狗的上窗口为0x5f,在计数器为0x7f至0x5f之间喂狗程序复位，使能提前唤醒中断，计数器减至0x40会产生一个中断，在中断完成喂狗及翻转PF10。

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 */    HAL_GPIO_WritePin(GPIOF,GPIO_PIN_9,GPIO_PIN_RESET);    HAL_Delay(24);    HAL_WWDG_Refresh(&hwwdg);  /* USER CODE END 2 */  /* Infinite loop */  /* USER CODE BEGIN WHILE */  while (1)  {  /* USER CODE END WHILE */  /* USER CODE BEGIN 3 */  }  /* USER CODE END 3 */}

void HAL_WWDG_EarlyWakeupCallback(WWDG_HandleTypeDef* hwwdg){    static uint8_t state = 0;    HAL_WWDG_Refresh(hwwdg);    HAL_GPIO_WritePin(GPIOF,GPIO_PIN_10,state);    state = !state;}