摘要
本文介绍了一种使用VHDL语言设计、在一片EMP7128S160 CPLD芯片上实现的总线桥。该总线桥是某型协调控制器系统的通讯核心,实现了系统下层的背板总线、背板总线管理器与上位机EPP并口之间的协议转换以及通讯仲裁功能。该桥为系统下层提供了高速的实时数据传输通道,也为上位机访问下层系统提供了完全的访问通道,使整套控制器兼具高性能、易调试两大特点。
A bus - birdge, based on VHDL and CPLD, used in a kind of harmony controller system, was introduced in this paper. This bridge is the core of communication of the controller system, it connects the bottom level backplane bus, backplane bus controller, and PC EPP parallel port. With this bridge, the bottom part of the controller system achieves high real - time performance, and the top level （ PC） achieves full access to the bottom part, which provide great convenience in system debugging and high flexibility in application.
出处
《微处理机》
2005年第4期79-81,85,共4页
Microprocessors
