Since uC / OS II is a famous RTOS, it only consist of real time task schedule and communication kernel, lack of support to peripheral equipment and interface, such as file system, network protocol, and graphic interface. 虽然uC/OSⅡ堪称最著名的实时操作系统,但它毕竟只是一个实时的任务调度及通信内核,缺少对外围设备和接口的支持,如没有文件系统、网络协议、图形界面。