| With the increasing demands of security, environment protection, comfortable feeling and economical price of vehicles, the number of electronic control units (ECU) has became bigger and bigger, and the complexity has added either. Using many ECUs and complex controlled program brought great impress to manufacturers. So, developing effective operating systems which are able to manger the memories of ECUs and resources of CPUs have became urgent. The standards named OSEK/VDX established by automotive industry alliance of European community to develop embedded systems and interface of applications could decrease producing periods and share software resources.OSEK operating system is a real-time embedded system which was designed for vehicle electronic industry. It has several features, one is portability, OSEK operating system provides many coherent interfaces for functions; another is expansibility, users are able to configure properties in system for OSEK standards. In all, it will be revolution that using OSEK standards into vehicle electronic industry.This paper tends to make the obscure concept in OSEK standards clear and concrete, make the details in the OSEK standards perfect. This operating system have implemented all functions describe in OSEK standards, if any, task management, count management, event management, resource management, communication management and network management, etc. This paper proposed several workflows, system models and data structures. At the time, because the standards has just came out in recent years, it exists some defects, such as, ceiling protocol is not always suit for all condition, messages would be discarded in communication for two ECUs, it would occur something wrong when the system dealing with the nodes which had errors. These defects would make the system collapsed in emergency. This paper aimed at the problems above all, optimized the defects in standards. At present, the author has implemented all these work in linux environment. |
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