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Found 9 results

  1. Hi Everyone, I (re)watched James Powell's talk at GDevCon#2 about Application Design Around SQLite. I really like this idea as I have an application with lots of data (from serial devices and software configuration) that's all needed in several areas of the application (and external applications) and his talk was a 'light-bulb' moment where I thought I could have a centralized SQLite database that all the modules could access to select / update data. He said the database could be the 'model' in the model-view-controller design pattern because the database is very fast. So you can col
  2. Hi all, I have a question about high level system design with FPGA-RT-PC. It would be great if I can get some advice about ideal approaches to move data between the 3 components in an efficient manner. There are several steps; DMA FIFO from FPGA to RT, processing the data stream in the RT to derive chunks of useful information, parsing these chunks into complete sets on the RT and sending these sets up to the Host. In my system, I have the FPGA monitoring a channel of a digitiser and deriving several data streams from events that occur (wave, filtered data, parameters etc). When an e
  3. Hi everybody, Currently working on VeriStand custom devices, I'm facing a 'huge' problem when debugging the code I make for the Linux RT Target. The console is not availbale on such targets, and I do not want to fall back to the serial port and Hyperterminal-like programs (damn we are in the 21st century !! )... Several years ago (2014 if I remember well) I posted an request on the Idea Exchange forum on NI's website to get back the console on Linux targets. NI agreed with the idea and it is 'in development' since then. Seems to be so hard to do that it takes years to have this simpl
  4. Hello again LAVAG, I'm currently feeling the pain of propagating changes to multiple, slightly different configuration files, and am searching for a way to make things a bit more palatable. To give some background, my application is configuration driven in that it exists to control a machine which has many subsystems, each of which can be configured in different ways to produce different results. Some of these subsystems include: DAQ, Actuator Control, Safety Limit Monitoring, CAN communication, and Calculation/Calibration. The current configuration scheme is that I have one main c
  5. Hello Everyone, I need litter suggestion about object oriented with Producer Consumer design pattern. I have One MAIN program and Other 7 module that controlled (mean sending message or command by queue to module) by MAIN program and it has producer consumer design pattern.Now i want to convert this application into OOP but my doubt is if I will convert in OOP then each case in consumer loop is become a class(Command pattern).In such case I have more than 100-200 class in entire application. is it good idea to have such big amount of class in application? or i misunderstand some
  6. So this will seem fairly long winded but I believe some people here will find this to be an interesting question and hopefully people can point me in the right direction. To give you guys some background I am a process control integrator working with PLC's and CRIO's to create automated solutions for out clients. I have a background in Software engineering and have worked a great amount in the past in Object Oriented languages such as Java or C#. I have only been using LabVIEW for the past 2 years and this is the first time I have utilized the OO features of LabVIEW. One of the first thi
  7. Hi, I'm writing a LabVIEW application using the Actor Framework. This is the first time that I have used the framework and I need some advice regarding application architecture. My apologies if this is a basic question! How is a settings dialog box best implemented? In the past in non-Actor Framework applications I have loaded the configuration from a functional global variable, displayed the settings dialog, then written the updated settings back to the functional global. I'm not sure this would work correctly (or optimally) within the context of the Actor Framework, though. My a
  8. Hey guys, So I was just wondering if forums like LAVA had any code review of an entire application and such. I typically have code review done at work but I was wondering if there was a thread where people just shared their code. I understand that sharing an entire code is typically not possible due to company policy and IP related matters but I thought it might be nice if I can take a look at a code of somebody outside of my typical circle and see how they do things.
  9. 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. - Clien
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