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一、接口标准化的目的近年来,计算技术迅速发展,广泛应用于工业、农业和科学技术各个领域。任何一个现代化的自动测试或过程控制系统基本上是由各种传感器、测量仪器和计算机组成的。特别是随着微处理机的发展,更加激烈地希望把一些数字设备按照需要联接成一个有机的系统来运用。这就要求必须在组成系统的各个部分之间建立起有效的联系。即控制器要能够根据程序向其它各个仪器发布命令,而各个仪器也能识别并接受这些命令,按照规定的内容与顺序完成指定的任务,各个仪器间也应能够互相发生联系。为了保证实现这些要求而在各个仪器间设立的连接设备就叫做“接口”。接口是由许多信息传输线及其逻辑电路所组成。接口要解决的是信息的传送和处理问题,所涉及的问题很多,可用图1来概括说明。
First, the purpose of standardization interface In recent years, the rapid development of computing technology, widely used in various fields of industry, agriculture and science and technology. Any modern automated test or process control system is basically composed of a variety of sensors, measuring instruments and computers. Especially with the development of microprocessors, it is more and more keen to apply some digital devices as an organic system as required. This requires that effective links must be established between the various components that make up the system. That is to say, the controller should be able to issue commands to other instruments according to the program, and each instrument can also recognize and accept these commands, perform specified tasks according to the specified contents and order, and each instrument should also be able to contact each other. To ensure that these requirements are met, the connection devices established between the various instruments are called “interfaces.” Interface is composed of many information transmission lines and logic circuits. Interface to solve the problem of transmission and handling of information, many of the issues involved, can be summarized in Figure 1.