基于Linux的嵌入式工业测控系统

该文针对当前工业控制领域网络控制技术的快速发展，给出了一种应用于测控系统的基于Linux 的嵌入式系统的设计方案。利用Linux 自身提供的条件编译系统，初步解决了Linux 作为嵌入式操作系统面临的一些问题。并利用实时应用接口(RTAI)来增强Linux 的实时性，引入实时硬件抽象层结构(RTHAL)，利用Linux 的内核模块机制提供实时服务和完成实时任务，解决了Linux 实时性不足的问题。通过数据采集程序的实现给出了在RTAI-Linux 环境下开发实时应用程序的设计方法。
关键词：Linux；嵌入式系统；测控系统；实时操作系统；RTAI

Abstract：Presently,according to quick development of the Network control technology in industrial meausure and control fields, So we apply a kind of application of the embedded system to measure and control system by industry control fields which based on Linux of embedded system.Making use of the condition of itself to analyse the system.Primarily resolved some problems of Linux by way of embedded operating system.At the same time,by taking advantage of Real Time Application Interface to enhance the real time capability of Linux,and real time hardware abstract layer is introduced and the mechanism of loadable
kernel module is used to provide real time service and complete real time tasks. The problem of lack of real time capability of Linux is resovled. The program of data collection presents an approach to develop real-time application based on RTAI-Linux.
Keywords: Linux;Embeddeds ystem;Measure and control system;Realtime operating system; RTAI