How do you count the frequency of a boolean signal?

[altenbach]

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aeastet wrote:
This vi should work for you

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Sorry, but this VI just earned a honorary mention in our Rube Goldberg thread. 😄

[aeastet]

Here is the simplified version. In the past I thought the to double did nto give the fractional numbers. That is why I did the complex conversions.

[Ray.R]

Altenbach forgot to mention the slight abusive use of unnecessary Local Variables. 

The medical term for this abuse is "Localitis".  There is a cure..

Wiring directly would have eliminated 2 indicators and 2 Locals  plus eliminated the need for a Flat Sequence Structure...  An added bonus would have been cleaner code.

For the code to actually run correctly as an example, it should have been in a For Loop which has 2 iterations.

Message Edited by Ray.R on 03-11-2010 08:05 AM

[Ray.R]

Here's a snippet without Locals.

The reason for 2 iterations is to initialize t = 0.  Actually, depending on the rest of your code, you would not even need the loop.  I'll do another snippet.

 

This one below  is probably more appropriate since the above was simply a self executing example and not how you would implement it.

 

Message Edited by Ray.R on 03-11-2010 08:20 AM

[herrlin]

Will

It is blowing my mind that this code worked for you.  You didnt have to take into account the sampling rate of your digital I/O?

Chill

[aeastet]

How would you have done this with a fore loop? You do not know when the boolean value will change so you will only get one event at a time. The boolean will only change state once. I would love to see what you can do?

[herrlin]

aeastet

This is my take on your code with a while loop.  Still blows my mind that this worked for Will.

[Ray.R]

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aeastet wrote:
How would you have done this with a fore loop? You do not know when the boolean value will change so you will only get one event at a time. The boolean will only change state once. I would love to see what you can do?

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Sorry about that..

In my haste, I missed the boolean, which is an important part of this..  Also the trouble with jumping intoa thread from an external link..

Can't delete my useless posts.  😮  😞

I'll go back and try to understand the initial post.

[aeastet]

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Will

It is blowing my mind that this code worked for you.  You didn't have to take into account the sampling rate of your digital I/O?

Chill

 

Herrlin

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I am not sure why you are having trouble with it. I made the code independent of timing. That is the whole reason that I did it the way I did. I look to see when the Boolean changes and recorded the time and when it changes again I recorded the time and do the calculation. I does not matter how fast the loop is going for something this slow.

[herrlin]

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aeastet wrote:

I am not sure why you are having trouble with it. I made the code independent of timing. That is the whole reason that I did it the way I did. I look to see when the Boolean changes and recorded the time and when it changes again I recorded the time and do the calculation. I does not matter how fast the loop is going for something this slow.

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I still would like to see how Will is getting his data from the digitial IO.  In my mind for this code to kinda work the data would have to be streaming real time.