Controls in real-time for the cRio

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  Hello!

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  I'm doing the scaling that requires 480 * 360 for operations return the second part of the map on a defined scale, but it is not enough - it is slow to make good zoom in real time.

  Maybe someone knows is it possible to increase the speed by using OpenVG? (OpenGL is not supported in the torch)

  Thank you for your attention.

  Realization of OpenVG for play ~ 1500px x 1500px images, rotation & them staggering realtime works pretty fast.

  So if someone needs of fast image processing to use OpenVG

• Do curve a real - time of the linear adjustment computed

  Hi, here is how my program works:

  (1) plot data read from a file

  (2) user can move the sliders to select a range of data

  3) allows users to choose the scale with control 2 Y (Y minimum and maximum)

  (4) make a linear adjustment of certain data in real-time and gives the results.

  And there's no problem, I asked the graph xy of a while loop in which I drove

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  And here's the problem: when the xygraph is traced the scale there is the default. A few ms then the scale will have correct (when the program has wide are the values of controls).

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  Thank you

  PS: I tried to put a sequence stacked with paint 1) graph 2) scale but cen see you in any case the flash of the scale Y incorrect

  I think all you need to do is disable autoscale for axes.

  Overall, there are a few very complicated and very dangerous built code. Here is a small sample (are there many, many others!):

  The code on the left can blocking the program, for example if the data are all zero. Why is there a local variable? thread just from the source, it is just there! What you probably want instead of these small while loops is the array of threshold function. No need to loop.

  To write two properties, you use oven (!) property and three structures of sequence nodes deep stacked. Property nodes are running up and down, so all you need is the code below! Also note that 'table of index' is resizable. You don't need to wire the index unless you want something special.

  

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  Thank you.

  Bye, Ouafa

  Hello

  If you just want to use Labview for logging and graphics (via Ethernet) AND that you do NOT use a CFP-real-time controller, you don't need to LabVIEW Real-time.

  For example if you use OR cFP-1804-Ethernet/Serial Interface for Compact FieldPoint.

  (http://sine.ni.com/nips/cds/view/p/lang/en/nid/202527)

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• Elapsed time for the materialized view vs Master table query

  Hello all;
  
  Small confusion about time up for the vs Master materialized view table query
  
  

  SQL > select count (*), sum (quan_sold), sum (amt_sold) of the sale;

  COUNT (*) SUM (QUAN_SOLD) SUM (AMT_SOLD)
  6000000 12000000 720480000
  Elapsed time: 00:00:30.54
  

  SQL > create materialized view mv1
  2 activate the rewrite of the query as
  3. select count (*), sum (quan_sold), sum (amt_sold) of the sale;

  Materialized view created.
  Elapsed time: 00:00:01.45
  

  SQL > select count (*), sum (quan_sold), sum (amt_sold) of the sale;

  COUNT (*) SUM (QUAN_SOLD) SUM (AMT_SOLD)
  6000000 12000000 720480000
  Elapsed time: 00:00:00.01
  
  Please see the three cases "Elapsed Time"...
  
  When comparing other cases.
  1. my query takes long time (30.54), extraction of data from the sale
  2. create a materialized view takes less time (01:45) why?
  
  Source: http://uhesse.com/2009/07/08/brief-introduction-into-materialized-views/

  >
  Small confusion about elapsed time for the materialized view vs Master table query

  SQL > select count (*), sum (quan_sold), sum (amt_sold) from the sale.

  COUNT (*) SUM (QUAN_SOLD) SUM (AMT_SOLD)
  6000000 12000000 720480000
  Elapsed time: 00:00:30.54

  SQL > create materialized view mv1
  2 activate the rewrite of the query as
  3. select count (*), sum (quan_sold), sum (amt_sold) of the sale;
  Materialized view created.
  Elapsed time: 00:00:01.45

  SQL > select count (*), sum (quan_sold), sum (amt_sold) from the sale.

  COUNT (*) SUM (QUAN_SOLD) SUM (AMT_SOLD)
  6000000 12000000 720480000
  Elapsed time: 00:00:00.01

  Please see the three cases "Elapsed Time"...

  When comparing other cases.
  1. my query takes long time (30.54), extraction of data from the sale
  2. create a materialized view takes less time (01:45) why?
  >
  Many queries take less time the second time you run them. After the first performance, there may be many, if not all, lines in the buffer cache. Then the second round will not make any or all e/s physical but will obtain data from the buffer cache.

  Also, you haven't checked that the MV was even used for the second run.

  Drop the MV and make the query several times and means of the time. Then create the MV and do the same thing.

• How to create a control of time for the while loop?

  Hi all

  I want to control my time running of the loop. In other words, I want to stop everything in the execution of the loop after a time (in ms) that is defined by the user. For example user defines Control Panel for 5 seconds before a while loop runs and stops after 5 seconds.

  I don't know is it possible with the while loop. I managed with the timed loop, but this must be wrong with my application. Y at - it of the other loops for timed control if it is not possible with while loop? There is also a simple loop with .vi random number (0-1) as an attachment.

  Best regards

  Jick

  Hi again,

  I managed to solve my problem right after I posted my first message. I did it with the passage of time and the register shift (for the elapsed time of reset).

  Thanks for your replies anyway!

  Best R

  Jick

• display of the work plan in real time for mobile devices?

  I do my design in illustrator before exporting all the assets for use in mobile applications. Is there a way to get the work plan to display on my mobile device in real time? As it is now, I have to save the artboard as an image and put it on my phone to see what it looks like.

  Hi Mike,.

  The answer would be 'no', at the present time. You are already one of the workarounds.

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  OM

• Possible to use the main clock FPGA as a basic Source of time for the NI 9234?

  Hello

  I am running a NI 9234, and NI 9222 module on a cRIO-9114 chassis with a real-time 9022 controller, data acquisition on the 8 channels on the full sample rate, using the FPGA.

  My problem is the synchronization of the data, where the NI9234 is usually a late acquisition, compared to the NI9222. I tried manually delay the NI9222 to take the first samples, but so far without success.

  To solve this problem and also to ensure a rate of data more comparable on both cards, I was wondering is it possible to create a Source of time Base master for the NI9234 WITH THE FPGA (opposite to import from another NI9234 or similar module)? The NI9222 I already provide with sampling of the impulses from the FPGA (as expected with this module).

  Another issue would be the characteristics of the exact chronology of the two modules, including in terms of synchronization between the beginning of the acquisition and the first samples of data. I couldn't find any information about it...

  Thank you in advance,

  O Hoppe

  Hello!

  I've never heard of a possibility to use a time base FPGA with a module of Delta-Sigma.

  But I think that the question should be what has not worked to delay the signal and how you did it. Have you read this article?

  How can I compensate for delays of different group with the C Series Modules in LabVIEW FPGA?
  http://digital.NI.com/public.nsf/allkb/74EB238E1BCADD528625735300681A7D

  Can you give a more detailed description of your trial to delay acquisitions? Can you provide a code example?

  Best regards

  Christoph