系统实现了AT89S52 单片机和计算机的串口通信，通过计算机端的软件控制单片机驱动字符显示屏显示规定的字符，来实现通过计算机控制单片机驱动字符显示屏的功能。整个系统由三个部分组成：计算机端软件，单片机系统，字符显示屏驱动。计算机端的软件采用JAVA2 平台。关键词：串口通信字符显示屏 JAVA2 平台Abstract: The system realizes serial communication between AT89S52 MCU and PC, andcan drive the LCM device to display specifically characters by operating PC endsoftware, which designs to realize the function of the MCU driving drive the LCMdevice to display characters under PC end. The whole system consist of three parts:PC end software, MCU system, LCM drives .The PC end software uses JAVA2platform.Keywords：Serial Communication LCM JAVA2 PLATFORM