Real-time Multitasking Embedded Software Design And Soft Bus Architecture And Realization

Along with the development of the embedded system technology, embedded system becomes more and more integrated and needs more complicated real-time multi-task embedded software to be built on it. The traditional system construction method, which go through from hardware clip to software module and then tasks and functions, is no more suitable for large system development for the real timing and schedule issues of the embedded operating system. Better system architecture is required for system security, conciseness and integration.According to the software architecture requirement, the characteristic of the embedded system and the system theory, this paper introduces soft-bus architecture. Packaging the system resource, it constructs a data providing layer. After using this architecture to deal with the spacecraft experiment project development, it gives a good performance on resource supporting and schedule for task module. Constructed a real embedded system including software uses this architecture, we have done the integrated test for software and validated the system performance and reliability, and also analyzed the system architecture.The result of the experiment indicates that this architecture can easily construct software system and can effectively provide resource using and task schedule. Using the hierarchical structure, the system can neatly load various task modules and protect the resource. The soft-bus data driven layer architecture can provide a good support for complicated embedded software development.The research on this topic has great meaning for the development of the embedded software architecture design.