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RT PC code example

Stream high-speed data through a network stream channel

Efficiently transfer blocks of data between the RT and PC by network streams.

LabVIEW RT block diagram snippet: RT writes blocks of data to a network stream channel, PC reads the blocks from the same channel

Use cases


Keep in mind

LabVIEW block diagram elements

Locate these elements with "Quick Drop" (press Ctrl+Space and start typing the name); click on an icon to see more sample code that uses that element:

Create Network Stream Writer Endpoint
Create Network Stream Reader Endpoint
Write Multiple Elements to Stream
Read Multiple Elements from Stream
Destroy Stream Endpoint
Flush Stream
Open FPGA VI Reference
Read-Write Control
Invoke Method
Close FPGA VI Reference
FIFO Method Node
Join Numbers
Split Number
Loop Timer

Example code

Expected results

https://youtu.be/UQE7KCLcTBo (5:23)

Developer walk-through

NOTE: See the walk-through videos of the RT/FPGA high-speed data streaming and network-published shared variable code examples to learn about those aspects of this LabVIEW project; the following walk-through covers only the network streaming technique between the PC and RT.

https://youtu.be/WtioGKULiG8 (4:54)


For more information

  1. Lossless Communication with Network Streams: Components, Architecture, and Performance (http://www.ni.com/white-paper/12267/en/)
    An introduction to network streams, features, and performance.
  2. Using the Right Networking Protocol (http://www.ni.com/white-paper/12079/en)
    Discusses the three most-common communication models -- command or message-based, process data, and streaming/buffered -- and the available networking protocols that are best suited to each model: TCP, UDP, network-published shared variables, network streams, and web services.