基于功能封装的仪器驱动程序可互换性实现技术研究

Implementation Technique of Instrument Driver Interchangeability Based onFunctional Package

给出了一种基于功能函数封装的仪器驱动程序互换性实现方法;针对IVI-MSS模型要实现仪器互换性需要替换驱动程序外,还需替换具有功能相同、接口相同的RCM的问题,指出采用IVI-MSS Server接口的形式作为"角色"向用户提供测试服务,实现应用程序和仪器驱动完全分离,并且只需要伴随RCM的替换即可适应IVI-MSS Server,实现硬件无关性;以某系统开发中应用的NI 5124示波器为对象,对仪器驱动器可互换性进行研究,分析了示波器的工作过程、采样时序、状态转换图;基于示波器IVI-COM驱动程序类图,针对IVI-MSS Server的要求,定制了RCM,根据测试功能分析确定的接口,封装了相应的功能函数,实现了示波器驱动程序的互换性。

In this paper, an implementation method of the instrument driver interehangeability based on functional interface package is put forward. Firstly directed toward the problem that IVI-MSS must replace driver and the RCM （role control modules） to implement interchangeability, the IVI-MSS interface is adapted as role＇ to provide service for test user , which implements the separation between application programs and instrument drivers , and the RCM is replaced to implement the hardware irrelevancy. Looked on the applied NI 5124 Oscilloscope in the developed system as object, the instrument driver interchangeability is studies, and the work process, sample time sequence, state conversion diagram of Oscilloscope are analyzed. In order to meet the need of the IVI-MSS Server, the RCM is designed. According to the testing function the functional interfaced functions are packaged to implement the driver interehangeability for the Oscilloscope.