作者：郭丽萍, 张艳荣, 林思苗

作者单位：西南交通大学机械工程学院, 四川 成都 610031

关键词：电源控制系统;CAN通信软硬件设计;网络负载分析;实时性分析;抗干扰能力

摘要：

为解决电源监控系统中存在的数字化程度低、实时性差、准确度和可靠性低等问题，在研究CAN协议的原理及应用技术的基础上，采用外挂Microchip MCP2515 CAN控制器的设计思想，完成基于AVR单片机的CAN通信软硬件设计，满足电源控制系统策略的需要。该文给出CAN总线的整体结构及控制器、收发器等组成部分硬件及软件的设计与实现，并对系统进行网络负载分析及实时性分析。实际运行表明：该系统可实现报文的发送、接收等功能，可靠性强、通信实时性好。另外，电气隔离电路的设计，进一步提高系统的抗干扰能力；同时，软件设计部分采用自顶向下的模块化设计方法，增强系统的可移植性。

Software and hardware design based on CAN communication for control system of embedded device power supply

GUO Liping, ZHANG Yanrong, LIN Simiao

School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China

Abstract: To solve such problems as low digital level,poor real-time performance,low accuracy and reliability,software and hardware parts of CAN communication are designed based on AVR,meeting the requirement of control system to power supply.Microcontroller in conjunction with external CAN controller of Microchip MCP2515 is applied with the foundation of CAN protocol and practical technology.After hardware and software of parts of the system such as controller,transceiver are designed and established,as well as the general structure is shown,network load analysis and real-time performance analysis are carried out.The result of test shows that system can achieve such functions as transferring and receiving of messages with good reliability and real-time performance for communicating.In addition,the design of electrical isolation circuit further improve the anti-interference ability of the system;meanwhile,the software design part adopts the top-down modular design method strengthening the portability of the system.

Keywords: control system of power supply;software and hardware design of CAN communication;network load analysis;real-time performance analysis;anti-interference ability

2017, 43(10): 109-113  收稿日期: 2017-01-28;收到修改稿日期: 2017-02-22

基金项目: 

作者简介: 郭丽萍(1990-),女,四川简阳市人,硕士研究生,专业方向为网络测控。

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