软件配置串口物理接口的应用

Application of Software Configuration Serial Port Physical Interface

在简要介绍基于通讯管理机串口应用的基础上,分析了RS232/RS422/RS485三种串口物理接口的差异性,针对现场更换板件或者跳线的弊端,提出了一种完全基于软件的、免拔插的配置串口物理接口的方案:无需更换板件或者跳线,就可以用软件配置串口。该方案可以避免更换硬件而引入的静电干扰,方便了工程调试人员现场的作业,也可以从后台配置和记录串口的连接类型,从而使通讯管理机在现场有更强的适应性和可靠性。

This paper analyses the three kinds of serial port interface of RS232 / RS422 / RS485 differences,aiming at the field replacement panels or jumper harm,and proposes a solution through software config serial port physical interface type：no need to replace the panel or jumper,can set the serial port physical interface by software.This free plug the software scheme can avoid the replacement of hardware and electrostatic interference introduced in this paper.