/**
  * @brief  Static single allocation.
  * @param  size: Size of allocated memory
  * @retval None
  */
void *USBD_static_malloc(uint32_t size)
{
  static uint32_t mem[(sizeof(USBD_HID_HandleTypeDef)/4)+1];/* On 32-bit boundary */
  return mem;
}


这个程序是什么意啊。只是为了看起来方便吗？