Synchronisation of input and output using myDAQ

Hello!
I am currently using the NI myDAQ and use both analoge output. and both analoge inputs. The sampling rate needs to be as high as 200k Hz. (Also within the while loop I do quite a lot of data manipulation and saving into text files.) My vi works generally fine, but I still have to problems:
1. How can I ensure that the read and write tasks are synchronised? I found out that it is not possible to use other trigger than the sample clock for write and read tasks using the myDAQ. (Is this right?) So as a workaround for me it is not important that the tasks start at the same time, but I want to ensure that the delay between "Start Write Task" and "Start Read Task" always is the same. Is this possible? And how can I realise it?
2. If I want to generate a non periodical signal that is not constant, how do I best generate this? At the moment I use a Sine Waveform.vi with a frequency of 0 and I change the offset input with every loop. I also tried to use the FormulaWaveform.vi but with this my produced waveform seemed to stop after completing the "number of samples in the waveform". But the sampling info must be the same for both AO channels I use, so I cannot simply increase this number.
Thanks a lot for any help! Jules
Attachments:
MyDAQReadWrite.vi ‏72 KB

hi Jules,
If you only want to ensure that the delay between "Start Write Task" and "Start Read Task" always is the same, you can realize it with a simple while loop (with Wait Until Next ms Multiple).
But if you want to synchronize for example both analog input, you can see how it works in different examples. Following Path is shows you how to find these examples:
In LabVIEW -> Help -> Find Examples... Brows(Brows according to Task): Hardware Input and Output -> DAQmx -> Synchronization -> "Analog Input Synchronizantion.vi"
To generate a non periodical signal that is not constant, you can change the offset input every loop. If you want to manipulate the offset while running you can also use local variables in the loop.
In this case you could manipulate for example with a slide control.
Regards,
grroesis

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Multiple inputs and outputs using DAQmx VIs

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I am reading eight analog inputs with the 9201 cards, two analog RTD inputs with the 9217 card, three digital outputs with the 9472 card, three analog outputs with the 9263, and eight analog inputs with the 9237 cards.
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Attachments:
TestAll-NI.vi ‏32 KB

Hi RandyC,
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test.vi ‏17 KB

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LOOP
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UTL_FILE.PUT_LINE(v_fh, v_finaltxt);
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END IF;
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e.g.
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PL/SQL procedure successfully completed.Output.txt file contains:
empno,ename,job,mgr,hiredate,sal,comm,deptno
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[add]
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data types.PNG ‏11 KB

GerdW,
I realise now I have taken us in the wrong direction. apologies for that.
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Limping_Twerp wrote:
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With useful help from Jamie Hodge, fbm and Nicholas Stokes (mainly)
I could manage to write a command for inputting and outputting from Final Cut Server Annotations.
So lets go to the fun part:
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It`s possible (in theory) to:
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2- add or create a md group called "Export Annotations" and add the above md field to it (don`t choose lookup)
3- Add "Export Annotations" md field to Asset Filter md group
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(I`m having problem with this, it doesn`t work).
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In theory it`s possible to modify the FinalCutServerIntegrationSample get and input annotations instead of adding another "comment" field to md group list.
Few!
Ok so please help beautify this out!
This will be very useful for a lot of people.... We know that it`s only a matter of time to FCSVR have this function built-in... but this "time" could be years.
So let`s start ourselves!
Thank you very much!!
Regards!

AlphaBlue wrote:
jverd wrote:
What were you hoping for? Someone reading your mind for what exactly you need, and handing you a giftwrapped answer, without you doing any work or clearly communicating a specific problem? This site doesn't really work that way.Fair enough. I'm asking for insight into how to input from and output to a StarOffice Spreadsheet into/from a Java program. (Think java.io except with spreadsheet files instead of .txt files.) I already answered that question.
I need to accomplish this without the use of a community-created library.That's a bizarre requriement. Why?
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In short, you have received answers commensurate with your questions.

XSLT Generation from input and output XML

Is it possible to generate an XSL mapping file in Java if we have input and output XML.
If yes, then how to achieve this when user defined functions are used during mapping?

Hi Prateek,
check the following links for Business connectors and adapter:
http://help.sap.com/saphelp_nw2004s/helpdata/en/92/3bc0401b778031e10000000a1550b0/frameset.htm
http://help.sap.com/saphelp_nw2004s/helpdata/en/2c/4fb240ac052817e10000000a1550b0/frameset.htm
http://help.sap.com/saphelp_nw2004s/helpdata/en/6a/3f93404f673028e10000000a1550b0/frameset.htm
Hope these help you.
Regards,
Anuradha.B

Synchronisation of input and output using myDAQ

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