How to update one shift register with two independent while loops?

[cayenne]

Hello all, I've got a control panel...with two clusters with indicators...a left side and a right side. I have messages coming in from serial port, and I'm currently updating the left and right side within their own while loops. I have a single variable, that needs to be updated based on updates on both sides. Basically I need to track last selection updated on either side....if I had 1,2 and 4 on the left side, and 3 on the right side...I'd need to track that 4 was the last number updated on the shift register variable to carry on for further uses in my vi. Can someone give me an idea how to update this one variable based on two while loops running independently within this same frame sequence? Thanks in advance, cayenne

[Yamaeda]

Use an Action Engine to store your information. Both loops can update and ask the AE if anything changed.

/Y 

[cayenne]

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@Yamaeda wrote:

Use an Action Engine to store your information. Both loops can update and ask the AE if anything changed.

/Y 

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Thank you for the reply!!

I'm not familiar with the concept of the "Action Engine"...and am starting to research, but if you had some links or quick example that would help immensely.

Again, thank you for the quick reply!!!

cayenne

[stevem181]

Hi cayenne,

You could probably use a LV2 Global which is a simplified Action Engine

steve

[cayenne · Accepted solution]

Thank you both of you for the suggestion.

I was able to figure a way to get the values out that I needed without the AE....but I read the link to the Nugget about them, and I can forsee a use for them in the future.

cayenne

[Spartan_UAV]

Morning:

I am new to the forum, and I could not find a place or a how to post my question: 

I currently have three While Loops in my VI, one of them is controling an Arduino for RPM control which it seems to be working fine. The other 2 Loops are calculating mean Pressure and Torque coefficient. Im having an issue in my front VI: The data is being graphically displayed but when I run the VI it only displays data for Pressure but not Torque. The Arduino and Pressure Loop are working but there seems to be a lag time or something that its not letting the Pressure and Torque loop to run at the same time in real time. The Torque graphs displays the x-axis but there is no amplitude. It seems that is waiting for the pressure loop interations to happen before starting Torque calculations. How can I have both loops run and be able to display both graphs?

[crossrulz]

Go to the main LabVIEW board and press "New Message".  Please include code so we can help debug.

[Spartan_UAV]

This is a copy of my VI.