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PXI equipment access method based on VISA (virtual instrument software architecture)

A device access and device technology, applied in the field of testing, can solve the problems of abnormal function and inconvenient operation of the PXI system, and achieve the effects of avoiding improper configuration, user convenience, and avoiding the possibility of wrong operation

Active Publication Date: 2016-05-11
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods require the user to participate in the configuration process. For the user, not only is the operation inconvenient, but it is also very easy to cause the PXI system to malfunction due to configuration errors.

Method used

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  • PXI equipment access method based on VISA (virtual instrument software architecture)
  • PXI equipment access method based on VISA (virtual instrument software architecture)

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Experimental program
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Embodiment Construction

[0042] The present invention will be further described in detail below in conjunction with the drawings and specific implementations:

[0043] Such as figure 1 As shown, a PXI device access method based on VISA. This method adds a process of automatically obtaining resource descriptors to the resource descriptor-based method. The VISA standard library functions are used. The VISA library functions are defined as follows:

[0044] viOpenDefaultRM(): Open the default VISA resource manager and initialize the VISA system to manage various devices in the VISA system;

[0045] viOpen(): Open the specified device resource according to the resource descriptor;

[0046] viClose(): Close the specified device resource and VISA resource manager;

[0047] viFindRsrc(): Query the qualified device resources in the VISA system according to preset conditions, and return the list of found devices and the number of devices;

[0048] viGetAttribute(): Get the value of the specified attribute of the device....

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Abstract

The invention discloses a PXI equipment access method based on the VISA (virtual instrument software architecture) and belongs to the technical field of testing. According to the method, a VISA standard library function mechanism is used, information such as equipment manufacturer number, equipment number, sub manufacturer number, sub equipment number, identification number and the like is programmed in a PXI equipment configuration register, and resource descriptors of equipment in a system are acquired automatically by a VISA resource manager according to the information of equipment identification number and the like, so that the PXI equipment is operated and accessed. With the adoption of the method, automatic configuration of PXI equipment resources can be realized, the uniqueness and accuracy of access to the PXI equipment in the system can be guaranteed, the possibility of faulty operation in the manual configuration process is avoided, dysfunctions caused by improper configuration, physical position change and equipment ID conflicts (multiple pieces of identical equipment exist in the system) are avoided, great convenience is brought to users, and the uniqueness and accuracy of access to the PXI module are guaranteed.

Description

Technical field [0001] The invention belongs to the technical field of testing, and specifically relates to a method for accessing PXI equipment based on VISA. Background technique [0002] PXI is an open standard. It has the advantages of high technical indicators and high cost performance, strong function, flexible structure, fast technology update and easy system integration. Using PXI products can quickly develop an ideal measurement and control instrument system in a short time. It is a virtual instrument building The ideal platform. PXI products have been widely used in communications, aerospace, military and industrial automation measurement and control fields. [0003] VISA is the abbreviation of virtual instrument architecture, which is a collection of software interfaces for communication between computers and VXI, PXI, GPIB, and serial instruments. As a standard function, VISA has nothing to do with the I / O interface type of the instrument, and has nothing to do with t...

Claims

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Application Information

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IPC IPC(8): G06F13/10
CPCG06F13/102
Inventor 刘磊孙建邱畅陈庆磊
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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