基于OSEK标准的嵌入式实时操作系统在汽车电子中的应用

摘要

RTOS is necessary for the complex control system, it can dispatch multi-task according to each priority, carry out task synchronization by segment or event flag, and achieve task communication by message array or mailloox mechanism,deal with urgency event by interrupt mechanism.It has better real-time and reliable performance compared with traditional front-back system.OSEK plays a lcading role in international automotive electronics field.The professional RTOS RX850 of NEC is introduced, the advantages and disadvantages of RTOS is explained, the RTOS software development platform based on RX850 is constructed, the tasks dispatching of engine functions and simulation by software are completed.It is very significant for the development of complex control system.%实时操作系(RTOS)是复杂控制系统中必不可少的一部分,它能按照任务的优先级实现多任务调度,通过信号量、事件标志来实现任务的同步,消息队列和邮箱机制来实现任务之间的通信,中断机制来实现突发事件的管理.较传统的前后台系统,它具有更高的实时性、稳定性.介绍了当前在国际汽车工业界日益占据主导地位的汽车电子开放式平台系统(OSEK/VDX)规范.介绍了NEC汽车电子专用实时操作系统RX850,列举了其他RTOS并分析了其优缺点,建立了基于RX850的RTOS软件开发平台,实现了汽车发动机控制模块任务的调度,并对RTOS的多任务进行了软仿,这对于复杂软件系统开发是非常有实际意义的.