基于PCI总线的开放性接口设计

采用可编程逻辑器件CPLD，分四个模块——控制寄存器模块、PCI控制器状态机模块、SRAM 控制器模块和仲裁器模块，分别完成通信并解析PCI总线、PCI状态的控制和翻转、负责SRAM接口数据的读写与数据交换、PCI 设备的仲裁机制等来实现PCI 接口，可连接各种PCI 接口的现场通信卡，提高了系统的开放性。
关键词：总线；接口；可编程逻辑器件；开放性 The design of opening interface based on PCI local bus Liu Zhewei1 JinWenbin1 Yan Jianjun1 Wang Xiaoxia2 (Zhejiang Institute of Mechanical & Electrical Engineering,Hangzhou1 ,310053, Hangzhou Zhengu Science and Technology Ltd2,310020) Abstract: The PCI interface is based on CPLD, it is divided into four modules , Control of register module realize communication , PCI controller state module, SRAM controller module and Arbitration module. they carry on correspondence and analyse PCI bus, control PCI state, write-read and exchange with data from SRAM interface, arbitrate PCI device respectively. It may link various communication cards with PCI interface, and improves the systematic openness.
Key words：Bus; Interface; CPLD; Openness