2.5 msec delay

[Clint1000]

Is there a way to delay each iteration of a FOR LOOP by 2.5 msec?  The delay millisecs only allows whole numbers..I think.

Thanks.

[crossrulz · Accepted solution]

LabVIEW 2018 introduced a High Resolution Polling Wait VI.  It polls the Windows time to "wait" for whatever time you need.  Do note that it will use 100% CPU when the time left to wait is under 2ms.

If using an older version of LabVIEW, you could make something similar using the High Resolution Relative Seconds.

[Mark_Yedinak]

If you are doing this on a Windows platform you are not guaranteed to get a resolution this accurate. If your timing is this critical yo should be using a real time platform.

[Yamaeda]

If you have a DAQ you could set up a sample of 4kHz and grab 10 (dummy) samples at a time. That should get you pretty Close. Windows isn't precise in this regard as it's not designed for that.

/Y

[Clint1000]

Maybe I wasn't think this through.  When you mentioned DAQ a light bulb went off.  What I'm trying to do ( PXI6229) is read 4 channels "simultaneously"..I know..I know I can't w a 6229 but if I read them fast enough its a magnitude better than what I need.  So rather than delay my loop 2.5 msec  I could do what Yamaeda  suggested and manipulate samples and sample rate so that I get my 4 channels sampled ( inside my FOR Loop) at 2.5 msec satisfying my requirement.  Sound legit?

Thanks..

[JÞB]

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@Clint1000 wrote:

Maybe I wasn't think this through.  When you mentioned DAQ a light bulb went off.  What I'm trying to do ( PXI6229) is read 4 channels "simultaneously"..I know..I know I can't w a 6229 but if I read them fast enough its a magnitude better than what I need.  So rather than delay my loop 2.5 msec  I could do what Yamaeda  suggested and manipulate samples and sample rate so that I get my 4 channels sampled ( inside my FOR Loop) at 2.5 msec satisfying my requirement.  Sound legit?

Thanks..

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Absolutely !