crossrulz
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Everything posted by crossrulz
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Adding values to Enum resets all instances to default
crossrulz replied to A Scottish moose's topic in LabVIEW General
If you are just adding to the end of the enum, I don't think the enum constants are supposed to reset. I have ran into issues when changing names and/or adding in the middle, but the Update Typedef tool is used to fix those. Now I have to go play around with this... -
If going that far, I would just add the Open and Close cases as well and then just leave the file open. It would be a little faster as it avoids all of the opening the file and parsing the data etc.
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cross point on the dark side: CRC-16 Calculation from C code
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Sounds like the classic floating point accuracy issue to me.
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Decouple UI and application core - need advice
crossrulz replied to candidus's topic in Application Design & Architecture
I tend to bound back and forth depending on the application. At some point, it just becomes way too many User Events to try to keep track of when you use individual events. I think I only had 1 application where this became an issue. But on the other hand, it is quite nice to only register for the events/messages that that specific process cares about instead of having to process all messages. -
Here is my 16-bit CRC saved in 2009. 16-bit CRC.vi
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crosspost on the dark side
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What do you consider "expensive"? For most of my test systems, by the time I put in certain upgrades, I have been quite consistant at $1500 with Super Logics.
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There's a reason I always gave management an estimate that was 4x what I thought it would take. They would always cut an estimate in half trying to win the bidding war and then crap happens which causes things to take twice as long as you initially thought. Hey, I was right on budget! How did that happen?
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are Boolean expression stopped like they would be in C ?
crossrulz replied to ArjanWiskerke's topic in LabVIEW General
Do you really have an application that needs that much optimazation? You likely have other issues if that is the case. Anyways, you can do that exact logic easily enough without the AND. Note: The FALSE case just has the FALSE value passed through.
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It should NOT be enabled by default as of LabVIEW 2014. NI knows that is a security hole and has WebDav instead enabled.
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Sounds like somebody make a new Shortcut Menu Plugin. A bunch of community made plugins were posted here, but I don't think I've seen a spell check one.
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A solution was found in the cross post I linked to above. The solution was to use Unflatten From String
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I actually got a couple of wrist wraps that had a pad built in. These helped a little bit. In the end, I found that the desks that I was using (mostly at a customer site) was the main issue. Been working from the office a lot more (which have musch better desks) and my wrists have not bothered me hardly at all for almost 2 years now. I haven't even used the wraps.
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Switch on and off a weight scale
crossrulz replied to jackky's topic in Remote Control, Monitoring and the Internet
Sounds like you need a digital output. How much current do you need for this 5V output? You may need a relay to control the output voltage. -
I also highly recommend Tom's book. It was well put together and even taught me a couple of things.
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I'm moving my current projects to use 2015. Have not ran into any issues yet. As Brian stated earlier, NI has focused a lot of their energy on stability. So 2015 is practically 2014 SP2 (just with a couple of new features). If you are going to upgrade, I would just move up to current and then use the SP if/when it comes out.
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cross-post on the NI Forums
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Yep, ran into that issue as well. I had to take the cycle mean and subtract that from the waveform and then calculate the RMS. I wonder if I still have that code floating around here...
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Something I learned on one project is that you want a whole number of cycles of your waveform when you do the RMS calculation. You could do a check for zero crossings to determine when a period ended. I ended up doing some math with the sample rate and the expected frequency of the waveform I was capturing to figure out how many samples to truncate before doing the RMS calculation.
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1. The requirement tags are just free labels with the right text in them. You can also put them in the VI and control descriptions if you want. 2. I would just use a queue to send the error information to your error handling module. It is simple and quick to do. But I now have to put out a shameless plug: Certification Nugget: CLA
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Any cool new features of LabVIEW or toolkit?
crossrulz replied to doradorachan's topic in LabVIEW General
Here are a few news articles for you to look over. NI Helps Engineers Solve Big Data Challenges With New CompactDAQ Hardware and DIAdem 2015 Software NI Launches Next-Generation Control Systems Optimized for the Industrial Internet of Things (IIoT) Write Code Faster with LabVIEW 2015 -
I do this as well. But I take it one step further and have it all inside of a library. I then make the Action Engine and the enum controlling it private. This makes it so that the API is nothing but the wrapper VIs. It helps by keeping other people away from the AE and screwing something up. I can't wait to look at your code here. Sounds like something I could possibly use.
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If the Application Font got changed, then everything will be a little different. I especially saw this happen when going from Windows XP to Windows 7. I haven't tried Window 8 yet, so I'm not sure if that would have changed there.
