F4系列开发指南 03 通用定时器定时中断实现LED闪烁

赞

楼主你好，我在f1上使用上诉方式实现LED闪烁时，LED初始化成功，可是并不闪烁，貌似HAL_TIM_PeriodElapsedCallback函数就没执行过，这是哪的问题啊 下面是主要代码，麻烦你看看，谢谢
main.c
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();
/* Configure the system clock */
SystemClock_Config();
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_TIM2_Init();
/* USER CODE BEGIN 2 */
// start TIM2 time base interrupt
HAL_TIM_Base_Start_IT(&htim2);
// init LED0
HAL_GPIO_WritePin(GPIOB,GPIO_PIN_8,GPIO_PIN_RESET); // LED0 RESET
HAL_GPIO_WritePin(GPIOB,GPIO_PIN_9,GPIO_PIN_RESET); // LED1 RESET
tim.c
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
//if(htim->Instance==TIM2)
//{
//static uint16_t s_tim2_cnt = 0;
// 5 times TIM2 overflow equals 250ms
//if(s_tim2_cnt == 5)
//{
//s_tim2_cnt = 0;
HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_8);
HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_9);
//HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_4);
//}
//else
//{
//s_tim2_cnt++;
//}
//}
}