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我下载了ST公司官网的最新stm32cube图形化配置软件，并使用它来配置我的F407-discovery开发板，使用了PortD.12与PortD.13两个引脚控制2个LED灯。我在main函数里添加了闪烁D.13的LED灯，但是实际并没有观察到LED灯在反转。求助各位了~~~

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();
/* USER CODE BEGIN 2 */
 
/* USER CODE END 2 */
 
  HAL_GPIO_TogglePin(GPIOD, GPIO_PIN_13 );
   HAL_GPIO_TogglePin(GPIOD, GPIO_PIN_13 );
   
  /* Code generated for FreeRTOS */
  /* Create Start thread */
  osThreadDef(USER_Thread, StartThread, osPriorityNormal, 0, 2 * configMINIMAL_STACK_SIZE);
  osThreadCreate (osThread(USER_Thread), NULL);
 
  /* Start scheduler */
  osKernelStart(NULL, NULL);
 
  /* We should never get here as control is now taken by the scheduler */
 
/* USER CODE BEGIN 3 */
  /* Infinite loop */
  while (1)
  {
  }
/* USER CODE END 3 */
 
}

这里非常感谢大家帮忙！

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