is there a case structure that can catch the rising edge of a data line?

[K.R.]

hi, I have a integer data line that increases in value as the program runs.  I'd like to catch some of its transition points, for example, when it changes from 4 to 5, and use that as a trigger to activate a sequence of other actions.  the integer line is within a while loop, and it doesn't increase its value after every loop (its value could stay the same for several loops).  what's the best way to catch a particular transition of this line and use it to trigger some other events?

thanks much

[altenbach]

Feed your data in a shift register or feedback node to have the current value and the value from the previous iteration available.

The rest is could just be boolean logic (IF "current=5 AND previous=4" ) to be fed to a case structure containing your special code. There are many possible ways to do this.

[KR7]

ah ok that makes sense, thanks.  Is there any way to specify more than one conditions such as like you said IF something AND something with one case structure?  or would I need to use one case structure layer for every condition.  sorry I'm kind of new to the program

thanks

[altenbach]

Just do some boolean logic and combine the output of several comparisons. 😄

For example, the code in the picture executes the TRUE case if"  x is 5 and previously was 4. In all other cases, the FALSE case is active.

Message Edited by altenbach on 09-28-2006 12:01 AM

[KR7]

lol you make it look so easy. 

thanks man