RS 232串口通信在PC机与单片机通信中的应用  

Application of RS232 serial port in communication between PC and MCU

作　　者：潘方[1] 

机构地区：[1]国家广播电影电视总局726台,云南曲靖655000

出　　处：《现代电子技术》2012年第13期69-71,共3页Modern Electronics Technique

摘　　要：在功能比较复杂的自动控制系统中,通常以工控机为上位机,单片机为下位机,RS 232串口通信是工控机和单片机之间信息传递的枢纽,采用MAX232实现TTL逻辑电平和RS 232电平之间的相互转换,如此连接,既可体现出单片机的灵活控制功能,又可发挥出PC机强大的计算和显示功能,有利于对现场信号的实时采集、处理和监控,确保了良好的人机界面的交互性。In function relatively-complicated automatic control system,IPC is usually used as a upper computer,MCU as a lower computer,RS232 serial port as a messaging hub of communication between IPC and SCM,and MAX232 is adopted to implement the mutual conversion between TTL logic level and RS232 level.Such a connection can embody the flexible control function of SCM,express the powerful computation and display functions of PC,and is of benefit to signal real-time acquisition,processing,and monitoring on site,so as to ensure the perfect interactivity of man-machine interface.

关 键 词：RS232 接口定义 电气特性 消除干扰 MAX232 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]