[HAL库学习之路]7.定时器中断

一、Pinout

二、Clock Configuration

三、Configuration

定时器溢出时间

Tout=((arr+1)∗(psc+1))/TclkTout=((arr+1)∗(psc+1))/Tclk

四、Generate Code

代码 
定时器溢出时间为500ms，500ms翻转一次LED状态

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_TIM3_Init();

  /* USER CODE BEGIN 2 */

  HAL_TIM_Base_Start_IT(&htim3);

  /* 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_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)

{

    static unsigned char ledState = 0;

    if (htim == (&htim3))

    {

        if (ledState == 0)

            HAL_GPIO_WritePin(GPIOF,GPIO_PIN_9,GPIO_PIN_RESET);

        else

            HAL_GPIO_WritePin(GPIOF,GPIO_PIN_9,GPIO_PIN_SET);

        ledState = !ledState;

    }

}