Automatic Transformation of Diagrammatical Specifications into Highly-Parallel and Realtime Data-Driven Programs

该项目的主要目标是建立灵活的软件开发/维护环境，在该环境中，基于动态数据驱动的原则，将易于理解的实时应用的图形化规范直接转换为高度并行的可执行程序。该项目取得的成果如下：1.将危险的顺序处理模型替换为自然的并行处理模型，从而实现集成的通信系统开发/维护环境。(见参考文献1和2)2.为高度并行的实时应用的自然描述建立了多边图解规范描述方案。在该环境中，表示功能块之间数据依赖关系的框图和一类数据结构的图形化表示在描述目标系统的处理结构中起着核心作用。In或…此外，为了提高动态行为的可读性，还使用了扩展顺序图、状态转移图和决策表。(见参考文献3，11)3.结合了历史敏感过程的增强的动态数据驱动处理模型被证明是最有希望的原则，在该原则下，以高度并行的方式执行从图表规范导出的生成的程序。(见参考文献3)4.通过引入基于面向数据的方法的通用实现，在工程工作站上建立了一个原型系统。在原型中，单芯片数据驱动处理器的可执行程序是从图形规格说明生成的。(参见参考文献3、4、5、9)5.通过指定几个实时应用来评估原型系统，例如HDLC协议和电梯控制系统。因此，认识到增量原型环境对于不完全规范的重要性，并提出了一种嵌入STAB组件的原型方案。(见参考文献10)较少

The main objective of this project is to establish flexible software development/ maintenance environment in which easily understandable diagrammatical specifications of real-time applications are directly transformed into highly-parallel executable programs based upon a dynamic data-driven principle.The results obtained during the project are summarized as following: 1. Hazardous sequential processing model should be replaced by a natural parallel processing model by which an integrated communication system developement/maintenance environment can be implemented. (See reference 1 and 2) 2. Multilateral diagrammatical specification description scheme was established for natural description of highly-paralle realtime applications. In this environment, a block diagram like graphical description representing data dependencies among functional blocks and a class of diagrammatical representation for data structures play central role in describing processing structure of target system. In or … More der to improve readability of dynamic behaviors, augmented sequence chart, state transition diagram, and decision table were also employed. (See reference 3,11) 3. An augmented dynamic data-driven processing model incorporating history-sensitive process were proved to be the most promising principle under which the generated programs derived from the diagrammatical specifications are executed in highly-parallel fashion. (See reference 3) 4. A prototype system were built on an engineering workstation by introducing generic implementation based upon data oriented approach. In the prototype, executable programs for a single chip data-driven processor are being generated from the diagrammatical specifications. (See reference 3,4,5,9) 5. The prototype system are evaluated by specifying several realtime applications, e.g. an HDLC protocol and a lift control system. Consequently, significance of incremental prototyping environment for incomplete specification was recognized and a prototyping scheme embedding stab components was proposed. (See reference 10) Less