【作者】 陈坤；

【导师】 余群明；

【作者基本信息】 湖南大学 ， 机械电子工程， 2008， 硕士

【摘要】 论文首先对市场上同类产品进行了研究,指出其待改进之处,随后论述了符合OSEK/VDX标准,具有高稳定性的车辆监控系统车载移动终端的设计。OSEK/VDX标准包括4个部分:操作系统、通信、网络管理及OIL语言。OSEK/VDX操作系统提供了一系列的服务和处理机制来控制任务和目标硬件;OSEK/VDX通信标准是一个用于自动控制应用软件的通信环境;OSEK/VDX网络管理最基本的任务就是保证电子控制单元通讯网络的安全性和可靠性;OSEK/VDX OIL描述了一种可以在特定CPU中配置应用程序的机制。本文在分析嵌入式实时操作系统uC/OS-II内核工作原理的基础上,着重研究了uC/OS-II内核的任务调度算法、任务切换机制及资源管理等方面的功能。根据OSEK OS的定义,对uC/OS-II内核的部分功能进行了改进和扩展,如任务调度算法与计数器报警器等,开发了VSOS操作系统。基于VSOS操作系统,完成了车载移动终端应用层软件的设计与硬件设计。硬件方面,论文对关键电路进行了详细具体的论述;软件方面,论文在多任务的架构基础上,引入了消息驱动机制,详细描述了任务之间消息传递的过程和各个任务处理消息的过程。最后,本文从硬件与软件两个方面总结了系统可靠性设计的经验,这些经验都是基于作者在设计开发过程中所遭遇到的实际问题而总结的,具有较好的借鉴性和实用性。本文还进一步论述了系统中存在的不足以及下一步的工作计划。更多还原

【Abstract】 First, the thesis studies the samiler product on the market and points out what to be improved. Then, the thesis discusses the design of the high reliability vehicle mobile terminal of the vehicle monitoring system based on OSEK/VDX norm.OSEK/VDX norm composes of four parts: operating system specification, communication specification, network management specification and OSEK/VDX implement language. The OSEK/VDX operating system provides a series of different services and processing mechanism to control task and target hardware; the OSEK/VDX communication specification is a uniform communication environment for automotive control unit application software; the essential task of network management is to ensure the safety and reliability of a communication networks for electronics control units; the goal of OIL is to provide a mechanism to configure an OSEK/VDX application inside a particular CPU.With analysing the operation principle of a embedded real-time operating system uC/OS-II, the thesis studies the scheduling algorithm of uC/OS-II, the task switch mechanism and resource management function emphatically,etc. According to the definition of OSEK OS, project team improves and expands some functions of uC/OS-II kernel such as task switch algorithm, counter and alarm function module, and develops VSOS operating system kernal.The design of hardware and applicatin software of vehicle mobile terminal product is completed based on the VSOS operating system kernal. As hardware aspect, the thesis detailedly discusses the design of the key circuit ; as software aspect, based on the multi-task architecture, the thesis introduces message-driving mechanism and detailedly discusses the process of messaging between tasks and the manner of message being processed by each task.Finally, from hardware and software two aspects, the thesis sums up the experience of system reliability design. This experience is based on the problem encountered in the processing of development and has good practicability and reference. Further more, the thesis discusses the shortage of system and works out the next step work plan.更多还原