Abstract: OSEK/VDX specification playes an important role in the automotive electronic control system, and system performance is significantly affected by message transmission mechanism based on OSEK/VDX communication specification. This paper analyzes three transmission mechanisms in the external communication, and proposes a new optimization strategy for message transmission mechanisms which adds uncovered property in the message structure in order to deal with message loss phenomenon. Implementation method and test results are represented.

Key words: embedded real-time operating system, OSEK COM specification, transmission mechanism, message communication

摘要： OSEK/VDX规范在汽车电子控制系统开发中具有重要地位，OSEK/VDX通信规范(OSEK COM)定义的消息通信传输机制对于系统性能有着重要影响。该文分析OSEK COM规范关于消息外部通信过程的3种传输机制，针对传输机制中存在的消息丢失现象，提出在消息结构体中增加不可覆盖属性的消息传输机制优化策略，并给出实现方法和测试结果。

关键词: 嵌入式实时操作系统, OSEK COM规范, 传输机制, 消息通信

CLC Number: 

• TP316