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Found 5 results

  1. How do you decode, unpack a flattened string in python which was sent by a LabVIEW TCP server? I want to exchange data via loopback. Therefore I take a sine wave and flatten it to string and sent over the network Simple TCP - ServerSINE.viSimple TCP - ServerSINE.vi. Then I have to decode the incoming data in a way that I have the correct numerical values like when I plot them in LabVIEW. I did this so far in python_client.py but the values are wrong. Does anyone know how to work with the transferred Data in python?
  2. Hey guys, I am currently having some issues with a FPGA program with Softmotion not compiling. We are running out of options in terms of how to get this FPGA program compiled. So my question is does compiling on Linux have a different probability of compiling FPGAs? I have heard that Xilinx Compiler is meant for Linux so it runs more efficiently and faster, so I was just wondering if the compile method was different as well
  3. Hello all, I am trying to integrate our LabVIEW build workflow into our CI Server. Currently we have several builds in LabVIEW projects that we can programmatically call in order to perform the build, conduct unit testing etc. using the IDE. I'm looking to integrate this into our build server using TeamCity. Every time we check in changes to one of the projects a build is triggered. Since building requires the IDE running, I am attempting to use the Command-line Runner in TeamCity to execute a batch file that launches the IDE with the builder VI as an argument. The build VI performs the builds, testing and then shuts-down LabVIEW. Running the batch file manually (as me) works a treat - LabVIEW starts up, the builds occur, unit test results are captured and then the IDE shuts-down. However I have run into a problem getting the batch file automatically called by TeamCity. The build agent runs as a windows service and it appears as if windows services do not have permissions ordinarily to start up GUI applications. I have tried several options such as configuring the log-on account for the service to run etc. Every time the build occurs, the log shows that the batch file has been run but LabVIEW does not start up. Unfortunately there is no command-line version of LabVIEW (pity) so it appears as if there is no obvious way to get this to work. Has any-one attempted this before? I know guys at JKI pull this off (using a different CI server) and I'm wondering whether this issue is familiar to anyone. Thanks for any and all help.
  4. I need to find a transport for message objects that allows two way communication without polling but is limited to server side connections only. So, the client can connect to the server but the server cannot connect to the client. First some context: My application communicates over the network using VI Server. My client app (the UI) opens a ref to a VI in my server app (the engine) and sends a message object containing the client app’s machine name and VI server port. The server app then opens a ref to a VI in my client and sends a message object with the reply data. I now have a two way communication channel via VI server and can pass any message object back and forth without polling. I learned today that our IT department plans to block all incoming connections to all non-server machines in the future. So, my client would still be able to connect to the server app within the network, but the server would not be able to connect to the client app because of this rule. This will completely break my networked messaging system. I do not know a way for LabVIEW to setup VI Server so only one end can connect to the other but allow two way communication without polling. Does anyone use a message system that would work in my situation? I would prefer to continue to use VI Server but I am willing to look at other solutions, as long as they were very robust and had low latency. thanks in advance for you help. -John
  5. Hi everyone, I'm wanting to open up the floor for your opinions and past experiences with designing a network communications architecture. - There will be one server, written in LabVIEW on a Windows based PC. - There will be multiple remote clients programmed in LabVIEW on cRIOs. - All devices will be connected via a wireless network, and all cRIO clients should have good throughput to the server. - It should be designed for bidirectional data flow, however the clients will do most of the talking. - Data sent will be, status packets, images, PDF documents, and other information. - Clients will not be continuously sending data, such as a typical DAQ system, but more reporting on events. I'm leaning towards the TCP socket option, but would like to consider higher-level forms of NI-propriety designs, such as Network Shared Variables or Network Streams, which I haven't had huge amounts of exposure to. Thanks for your opinions. Brenton
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