嵌入式软件仿真测试环境软件体系结构研究

Research on software architecture of embedded software simulation testing environment

利用嵌入式软件仿真测试环境(ESSTE,Embedded Software SimulationTesting Environment)对实时嵌入式软件进行系统测试是国内外公认的、行之有效的方法.基于UML和“4+1”视图模型,系统地对ESSTE的软件体系结构进行了描述.各个视图之间保持了良好的一致性,特别地,在设计视图中将ESSTE软件分为两大组件—实时组件和非实时组件,并按照“管道-过滤器”的软件体系结构模式组织,分别给出了它们的关键类.非实时组件的关键类是配置工具类,实时组件的关键类是模型类、实时变量类和调度器类.据此设计和实现的ESSTE-Basic体现了较好的质量特性,如可更改性、可移植性等,其成功地对多个软件进行了系统测试,高效地发现了大量潜藏的软件错误,验证了ESSTE软件体系结构的正确性和有效性.

It is an acknowledged and effective method to test real-time embedded software with ESSTE（embedded software simulation testing environment）. The software architecture of ESSTE is described systematically based on UML and “4 ＋ 1” views model. The contents in different views can coordinate with each other and particularly the software of ESSTE is divided into two system-level components in design view： real-time component and non-real-time component, which are organized by the pipe-filter architectural pattern. Configuration tool class is the key class for non-real-time component and model class, real-time variables class, scheduler class for the real-time component. Designed and implemented hereby, ESSTE-Basic reflects excellent quality characteristics, such as changeability, portability and so on. It has successfully been used for system-testing of several softwares, finding out a great of software faults effectively, through which both the correctness and the effectiveness of the software architecture of ESSTE are validated.