基于VXI总线的通用接口模块设计

Design of a General Interface Module Based on VXIbus

通过对VXI总线接口工作原理的深入分析，采用大规模可编程逻辑器件，设计了一种基于VXI总线A16／D16寄存器基的通用接口电路，实现了将复杂的VXI总线协议的应用转换为对简单的端口访问。采用通用的定点DSP器件和SPI总线技术，完成对VXI消息的解析和本地模块的电路控制。根据本文设计的通用接口模块已经在多个项目中得到应用，具有集成度高、适应性好等优点。

This article discusses a design of general interface module based on VXIbus after analyzing the VXIbus work principle. The module is the A16/D16 register-based device designed by large-scaled pro- grammable logical devices. It realizes the conversion from complicated VXIbus protocol to simple ports accessing. Using pointed-DSP device and the technology of SPI-bus, we accomplish the message analysis and control of the local moudule. This interface module has been verified for its high density, flexibility in many project applications.