基于C8051F020单片机与CPLD的多通信测试系统的设计

鉴于目前通信端口的多样性,并且要实现对各种通信端口的功能测试、性能测试、误码率测试,提出一种基于C8051F020单片机与CPLD的多通信测试系统的设计方法。此方法主要是利用单片机的地址总线、数据总线和控制总线向外扩展,来实现单片机与CPLD对一些电子设备进行多通信资源的功能测试、性能测试、误码率测试。利用C8051F020和CPLD设计了4路RS485/RS422、1路RS485和1路RS232通信测试资源;此系统不仅提供了多路通信资源的测试,同时用户可根据自己通信测试的需要,灵活地选择自己所需的通信测试资源。

Multi-Communication Testing System Based on C8051F020 MCU and CPLD

This paper proposes a design method of multi-communication test system on the base of C8051F020 MCU and CPLD. This method mainly uses the MCU＇s address bus,data bus and control bus outward expansion to achieve the functional testing,performance testing and error-rate testing of Multi-Communication Test Resources to some electronic equipments through MCU and CPLD.This paper designs four ways of RS485/RS422,a way of RS232 and a way of RS485 communica- tion and testing resources through C8051F020 and CPLD.