Abstract: The computer monitor systems are almost used in every area in nowadays, the measure and control module is the very important I/O devices. To study these modules is beneficial to development, test and teaching. This paper designs and develops a virtual digital I/O module, including the hardware environment, communication protocols and the techniques for data processing. The virtual module is tested strictly, and gives an example for using the virtual module.

Key words: I/O module, Protocols, Serial communication, Imitation

摘要： 计算机监控系统广泛应用于众多领域，检测与控制模块是计算机监控系统直接跟被监控对象关联的输入输出（I/O）模块，学习和研究这些模块对计算机监控系统的开发、测试与教学等都具有重要意义。该文设计了一个虚拟I/O模块的硬件环境与通信协议，研究了串行通信数据的处理技术，对该虚拟模块进行了严格的测试，并给出了应用实例。

关键词: I/O模块, 协议, 串行通信, 模拟

CLC Number: 

• TP311.52