基于EPP方式的双CAN接口卡的设计与实现

The Design and Implementation of Dual CAN Interface Card Based on EPP

为使不同的计算机系统方便的接入CAN总线网络,提供了一种基于微机并行接口EPP方式的双CAN接口卡的设计方案.CAN控制器采用SJA1000,逻辑译码采用CPLD完成,接口卡采用光耦隔离驱动方式,微机平台采用TC编程.占用系统地址资源少,编程灵活,性能可靠,应用广泛.

In order to connect different computer systems into the CAN bus network, the design and implementation of a dual CAN interface card based on EPP port is introduced in this paper. SJA 1000 is used as CAN controller and CPLD works as command decoder. Optical isolators are installed to separate CAN controller from transceiver. Turbo C 3.0 is adopted as the programming language of PC. This card occupies less system addresses than that in other design methods. The program is more flexible and reliable and can be widely used.