实时软件开发方法的研究

　　为解决实时软件设计中实时性能难以保证、开发方法通用性差的问题，设计了一种基于RTX的实时操作系统环境下，开发实时软件的通用方法。首先，分析了基于RTX的系统平台的实时性能。然后，从一般意义上研究实时软件的任务调度特性，建立起一个通用的参数化、层次化、模块化结构。最后，利用RTX的实时调度机制，详细设计了任务模块的调度运行流程，并验证了软件的实时性能。此方法从系统环境和调度机制两个角度提高了实时软件的实时性能，并从一般意义上给出了实时软件的通用的开发方法。

　　Abstract:

　　To find a solution to ensure the real-time capability and work out an efficient develop method in real-time software development， we designed a general method of real-time software development based on RTX， a real-Time extension subsystem. Firstly， it analyses the capability of RTX on real-time performance.Then it extracts the basic characteristic of scheduling in real-time system and establishes a general structure with preferences， hierarchy and modules. At last， it designs a particular flow of task modules scheduling by use of real-time method of RTX.It improve the real-time capability from by RTX and PRI task-schedule and it works out a all-purpose method of real-time software development