Increment +1 after Boolean toggle

[jpre2011]

Trying to increment +1 after Boolean variable toggle.

It should be simple but I got stuck because I need to increment when 1 goes 0 and 0 goes to 1.

Like detects the edge of pulse.

Thanks,

Jo

[Kyle97330]

You don't have a lot of details here but it kind of sounds like you need to add an event structure, with a "value change" event on a Boolean control, but with no other context to go on it could be something else that you need.

[ZYOng]

See Counter and Digital Edge Detector

There is a mistake in the falling edge loop. The constant should start with a false.

[altenbach]

You can use a feedback node to compare current to previous. If the are not equal, add one to the counter.

Quick draft:

[wiebe@CARYA]

What is the source of the Boolean?

If it's hardware, you probably want a anti jitter strategy.

If it's a UI, you probably want to use an event structure 

[littlesphaeroid]

You can use the built-in Is Value Changed primitive, or any or it's variants, like the one supplied with the OpenG toolkit. There are differences, namely whether the first value received by the VI returns a True (NI's correctly does, OpenG's does not).

[jpre2011]

Sorry i didnt realized that more detailed explanation was needed.

I m reading Temp from the sensor.  Temperature is going thru cycles, up and down.

Have a threshold that produces Boolean output.

Measuring time for True and False cycle.

Writing times for each cycle to array.  Thats why I need increment. 

I start looking to event structure, but I never did it before.  Because examples might not work for this case.

Hope this clarifies the need.

Thanks,

Jo

[jpre2011]

Sorry i didnt realized that more detailed explanation was needed.

I m reading Temp from the sensor.  Temperature is going thru cycles, up and down.

Have a threshold that produces Boolean output.

Measuring time for True and False cycle.

Writing times for each cycle to array.  Thats why I need increment. 

I start looking to event structure, but I never did it before.  Because examples might not work for this case.

Hope this clarifies the need.

Thanks,

Jo

[ben64]

Using the Boolean crossing point by point from the signal processing palette (ptbypt, other functions).

Here I'm using a threshold of 0.5 and using the either direction setting.

Ben