IVI-C vs IVI-COM | Difference between IVI-C and IVI-COM
This page compares IVI-C vs IVI-COM and mentions difference between IVI-C and IVI-COM.
IVI stands for Interchangeable Virtual Instruments. It is the latest software instrument driver technology developed by National Instruments (NI). It is similar to Labview and Labwindows/CVI.
IVI Foundation has specified specifications for 13 instrument classes including Oscilloscope, signal generator, spectrum analyzer, DC power supply, digital multimeter, AWG/function generator, switch, power meter, frequency counter, digitizer, upconverter, downconverter, AC power supply etc. in order to achieve interchangeability.
Following are the benefits of IVI driver:
• Interchangeability: IVI drivers enable exchange of instruments with minimal code changes and hence will reduce time as well as effort.
• Ease of Use: One can use preferred ADEs; standard APIs will provide fast, intuitive access to the functions.
• Quality: common commands, desirable options, rigorous testing to ensure driver quality
• Simulation: It allows code development and testing even when instrument is unavailable.
• Performance and reliability: range checking and state caching
In order to use IVI, following minimum softwares are needed.
• Labwindows/CVI 2010
• NI-VISA 5.0
• Agilent 34401A IVI-C Driver
Tabular difference between IVI-C and IVI-COM
Following table mentions difference between IVI-C and IVI-COM drivers developed by National Instruments(NI).
|Adoption in IVI spec.||since Aug. 1998||since Jan. 2003|
|Source code for message type instruments||Available||Available through custom install|
|Driver tools for development||IVI driver wizard (CVI)||Third party custom tools|
|Stability||Industry proven and based on VXI Plug & Play spec.||Based on Superceded COM|
|Native interface||C, Labwindows, CVI||Visual studio|
|Native Interface via custom wrapper||labview, visual studio||C, Labwindows/CVI|
|IVI based software products||NI switch executive||None|
|Interchangeability, Simulation, multithreading||Yes||Yes|
|State caching||on all drivers written by NI||driver supplier dependent|
|Interchange checking||on all drivers written by NI||driver supplier dependent|
|Trace class level calls||Yes (NI I/O Trace)||No|
|Advanced simulation||Yes (NI class simulation drivers)||No|
|support for custom IVI classes||Yes||Yes|
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