cla summit 2013: connecting labview to everything else
DESCRIPTION
Slides from JKI's CLA Summit 2013 presentation, "Connecting LabVIEW to Everything Else," presented by Jim Kring. Our consulting customers want the software we create to be “open,” in the sense that they need to integrate it into other business systems, or they need to use it from their own system development, or they just need to get data out in the way they want. This means providing an external API that users/clients can access – especially from tools other than LabVIEW. In this presentation from the Americas CLA Summit 2013, Jim Kring explains why external APIs are a fundamental part of professional software development, and explores how different types of APIs are useful at different stages of development all the way from proof-of-concept to final shipment.TRANSCRIPT
PUSHING THE LIMITS OF LABVIEW
Connecting LabVIEW to Everything Else!
Jim Kring, JKI at the Americas CLA Summit 2013!geekandpoke.typepad.com
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APIs and Systems!
APIs
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• Products can be more than what’s in the box!
• Customers can solve more business problems!
• Customers become loyal and locked-in!
APIs: Business Value!
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APIs and Systems!
APIs
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APIs and Instruments!
APIs
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Instruments APIs using SCPI!
Call 1-800-IEEE-488
MEAS:VOLT? MEAS:CURR?
SCPI = Standard Commands for Programmable Instrumentation
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Software Defined Instruments!
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Embedding LabVIEW Becoming More Practical!
More opportunities to create products powered by LabVIEW
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Back to Instruments and APIs !
It’s time for a demo!!
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• System VI!• Loads up the system and all its components!• Has a registry of all SCPI tree/nodes and their SCPI command
handlers!• Runs a TCP-IP Server / Listener at startup!
• TCP-IP Server / Listener VI!• Launches a connection handler when a client connects at the port!
• SCPI Connection Handler VI!• Parses (REC:RUN) SCPI message to determine which tree/node’s
(REC) command handler VI to call and passes it the (RUN) command.!
• SCPI Command Handler VI!• Executes a Case Structure frame for the (RUN) command.!
SCPI API Implementation in LabVIEW!
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• SCPI (over TCP-IP, Serial, GPIB)!
• Web Services (REST / XML: LabVIEW, Custom)!
• DLLs, .NET, ActiveX, COM!
• Network Shared Variables!
• File IO, Dropbox!
• Custom? Others?!
API Technologies!
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• LabVIEW!
• Python!
• Others?!
Language Bindings!
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• External / Public APIs!
!callable from outside the system!
• Internal / Private APIs!
!only callable from inside the system!
External vs. Internal APIs!
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JKI: Prototype Software to Product Software!
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APIs and Systems!
APIs
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One More Thing!
Join Our TeamHelp us build the next generation of instrumentation.!
Talk to a JKI engineer or visit jki.net/careers.!