软件接口技术在串行通信中的应用

The application of software interface in serial port communication

本文介绍了一种在上位机主程序无法与下位机进行通讯的情况下，利用软件接口程序实现上位机与下位机通讯的新方法。该方法采用了多线程技术和虚拟键盘输入技术将整个系统有机的分成三个各自独立的模块，降低了系统的复杂性，减小了开发成本。本方法具有通用性。

A new approach to realize the communication between upper-computer and lower-computer with the serial port is described in this paper in the case of upper-computer program can not communicate with lower-computer. The method takes advantage of multithread technology and virtual keyboard input technology to divide the system into three independent modal. The system complexity and development cost can be cut down with this method. It is a universal method.