基于嵌入式ARMMODBU协议研究实现1.doc

论文题目: 基于嵌入式ARM的MODBU协议的研究与实现 专 业： 电子信息工程 学 生： 孙玉鑫 签名： 指导教师： 孙弋教授 签名： 摘 要 电子技术的迅速发展极大的改善了人们的生活，彻底的改变了世界的面貌。在工业控制领域现场总线控制系统（FCS）的出现传统的可编程控制器PLC）和分散式控制系统DCS）基本结构。现场总线系统技术极大地简化了传统控制系统繁琐且技术含量较低的布线工作量，使系统检测和控制单元的分布更趋合理。ModbusLinux操作系统以其开源、免费、易于移植,支持众多的处理器而得到了广泛的应用。ARM处理器具有成本低、功耗低、易开发和性能好等特点，其中的S3C2410性价比、可靠性较高可作为本系统的硬件平台。 本论文首先介绍了Modbus协议的规范,协议的通信原理以及对协议的具体实现过程。之后对嵌入式Linux操作系统平台的建立、构造以及内核的制作、移植、烧录等过程也进行了的阐述，最后实现了基于RS485接口的Modbus串口编程。 【关键字】 ARM 嵌入式Linux Modbus总线 串口通信 【论文类型】设计型  Title: Research and Implementation of Modbus Protocol on ARM-Based Embedded System Major: Electronic information engineering Name: Sun Yuxin Signature: Supervisor: Professor Sun Yi Signature: Abstract The rapid development of electronic technology has greatly improved peoples lives, completely changed the world. The emergence and development in the field of industrial control field bus control system (FCS) completely changed the basic structure of the traditional programmable logic controller (PLC) and distributed control systems (DCS). Field Bus System greatly simplifies the workload of the tedious and low-tech effort traditional control system wiring, which turns a variety of parallel communication to serial communication, at the same time makes the distribution of the system detection and control unit more reasonable. As a member of field bus ，Modbus protocol has been widely used in the field of automatic control and communication because of its good capacity of data transmission ,and its expandability and reliability. Linux is open-source, free, easy to port, and supporting a large number of processors, so it is widely used, particularly in the embedded field. ARM processor with its low cost, low power consumption, easy development and good performance characteristics, which S3C2410 cost-effective, high reliability can be used as the hardware platform. First，the Modbus protocol specification, protocol com