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频率2.097Mhz , TIM2定时1s触发一次中断
1.TIM2初始化
HAL_TIM_Base_Init>HAL_TIM_ConfigClockSource>HAL_TIMEx_MasterConfigSynchronization

1. /**
   

2. * @brief TIM2 Initialization Function
   

3. * @param None
   

4. * @retval None
   

5. */
   

6. TIM_HandleTypeDef htim2;
   

7. void MX_TIM2_Init(uint16_t time)
   

8. {
   

9. TIM_ClockConfigTypeDef sClockSourceConfig = {0};
   

10. TIM_MasterConfigTypeDef sMasterConfig = {0};
    

11. 
    

12. htim2.Instance = TIM2;
    

13. htim2.Init.Prescaler = 2000;
    

14. htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
    

15. htim2.Init.Period = time - 1;
    

16. htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
    

17. htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
    

18. if (HAL_TIM_Base_Init(&htim2) != HAL_OK)
    

19. {
    

20. Error_Handler();
    

21. }
    

22. sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
    

23. if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK)
    

24. {
    

25. Error_Handler();
    

26. }
    

27. sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
    

28. sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
    

29. if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK)
    

30. {
    

31. Error_Handler();
    

32. }
    

33. }

2.TIM2 中断处理函数

1. /**
   

2. * @brief This function handles TIM2 global interrupt.
   

3. */
   

4. void TIM2_IRQHandler(void)
   

5. {
   

6. HAL_TIM_IRQHandler(&htim2);
   

7. }

3.主函数main

1. int main(void)
   

2. {
   

3. HAL_Init();
   

4. /* Configure the system clock */
   

5. SystemClock_Config();
   

6. LED_Init();//LED初始化
   

7. MX_TIM2_Init(1001); //1s一次
   

8. HAL_TIM_Base_Stop_IT(&htim2);
   

9. HAL_TIM_Base_Start_IT(&htim2);
   

10. 
    

11. while(1)
    

12. {}
    

13. }

4.TIM中断回调处理函数

1. void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
   

2. {
   

3. if(htim == &htim2)
   

4. {
   

5. HAL_GPIO_TogglePin(GPIOB,GPIO_PIN8);
   

6. }
   

7. }
   

8.