基于VxWorks的抗恶劣环境智能型CAN通讯卡的设计与实现  

Design and Implementation of Anti-harsh Environment Intelligent CAN Communication Card based on VxWorks

作　　者：曹建秋[1] 胡晓吉[2] 

机构地区：[1]中国科学院电子学研究所,北京100083 [2]华北计算技术研究所,北京100083

出　　处：《计算机测量与控制》2013年第8期2241-2245,共5页Computer Measurement &Control

基　　金：总装预研项目(513160901)

摘　　要：为了实现基于CAN总线的通讯与控制,提出了一种基于VxWorks操作系统的智能型CPCI总线CAN通讯卡设计方案;克服了传统智能型和非智能型CAN通讯卡的缺陷,采用了以FPGA为核心的新型结构,并设计了一种特殊的准异步FIFO用于跨时钟域的帧缓冲;介绍了CAN通讯卡的硬件设计、FPGA逻辑设计、VxWorks下的PCI设备驱动程序设计,以及抗恶劣环境加固设计;实验结果表明,该设计可以达到每秒6000帧以上的发送速率,高于一般传统智能型CAN通讯卡,并可以满足恶劣环境下的可靠通讯需求;已成功应用于军用车载设备的嵌入式控制中。In order to achieve communication and control based on CAN bus, a design of intelligent CAN communication card of CPCI bus based on VxWorks operation system is introduced. It overcomes the shortcoming of traditional intelligent and non--intelligent CAN commu- nication card, and adopts a new type of structure using FPGA as the core. A special FIFO used for frame buffer across clock domain is de- signed. Design of Hardware, FPGA logic, PCI device driver in VxWorks of the CAN communication card, and design of anti--harsh environ- ment, is described. Experiments show that the design can reach transmission rate up to 6000 frames/s, which is higher than the rate of tradi- tional intelligent CAN communication card, and the design meets reliable communications in military environment. The design has been suc- cessfully applied to embedded control of military vehicle equipment.

关 键 词：CAN总线 VXWORKS PCI FPGA FIFO抗恶劣环境 

分 类 号：TP336[自动化与计算机技术—计算机系统结构]