topic Re: mouse down help in LabVIEW

mouse down help

HePlayGame — Mon, 16 Dec 2013 16:58:36 GMT

Im trying to create a program so that when the next button is pressed, the gui then reads the next line on my excel sheet for the standard. Im having trouble with the mouse my down functioin for this.

Re: mouse down help

RavensFan — Mon, 16 Dec 2013 17:21:05 GMT

What trouble are you having? Give us some details at to what it is doing and how it is different from what you want.

Looking at your code. I see your Next button is set for Switch Until Released. That is almost certainly the wrong action. You probably want Latch When Released.

And since it is a Boolean button, you should set the Event to be Next:Value Changed rather than Next:Mouse Down.

Re: mouse down help

HePlayGame — Mon, 16 Dec 2013 19:28:25 GMT

What happening is that when i click next, it does not change the standard as written in excel, instead it keeps whichever standard it starts with. What I would like for it to do is each time next is clicked, the standard, as written in excel, is read and used by labview.

Re: mouse down help

RavensFan — Mon, 16 Dec 2013 21:11:31 GMT

Where does your VI evenget data from Excel? Nothing in your VI shows this.

Perhaps it is buried in one of the subVI's you didn't include?

Re: mouse down help

altenbach — Tue, 17 Dec 2013 00:25:37 GMT

Please show us where excel and file IO happens. I cannot find it.

Your VI is full of race conditions and very convoluted code.

To get one row of a 2D array, reshaping it to a 1D array with the lenght of one row seems pointless. All you need is "index array" with one index disconnected.
You have a case structure with the same property nodes in all case frames, thus they belong after the case, only on instance needed each.
There are plenty of potential race conditions. For example the boolean "standard" is read (via value property) and written in parallel elsewhere to the terminal.
How do you know what happens first?
Getting a scalar from an array does not need a detour via dynamic data ("Numeric", after the small FOR loop). try
index array"
In the "next: mouse down" event, all you need in the second frame is the "menu" local variable. wire it to the output if the +1 from the previous frame.
...

Re: mouse down help

HePlayGame — Tue, 17 Dec 2013 14:43:35 GMT

My apologies for the confusion, I haven't put my comments in the code yet. The excel data is read from the first subvi on the outside of the while loop

Re: mouse down help

RavensFan — Tue, 17 Dec 2013 14:45:42 GMT

Since you didn't include the subVI's, we can't look into them.

Re: mouse down help

HePlayGame — Tue, 17 Dec 2013 14:50:18 GMT

Here is the read vi

Re: mouse down help

RavensFan — Tue, 17 Dec 2013 14:56:44 GMT

The only part of the code that operates on the array coming from that subVI, isn't influenced by the menu number at all. It is only affected by whether the "Standard" boolean is True or False, and will either give Row 1 or Row 2 of the array coming in.

Re: mouse down help

HePlayGame — Tue, 17 Dec 2013 19:38:06 GMT

What do I need to do to make it read line by line?

Re: mouse down help

RavensFan — Tue, 17 Dec 2013 20:07:39 GMT

Have your menu do an index array on the array that you have now rather than doing what you are currently doing.

Re: mouse down help

GerdW — Tue, 17 Dec 2013 20:17:03 GMT

Hi,

use an autoindexing FOR loop instead of your TWL and forget about that ReshapeArray in front of the loop...

Re: mouse down help

HePlayGame — Tue, 17 Dec 2013 20:56:30 GMT

what do you mean by the array that i have now?

Re: mouse down help

GerdW — Tue, 17 Dec 2013 20:58:46 GMT

"ReshapeArray" is a function found on the array function palette - and in your VI...

Re: mouse down help

HePlayGame — Wed, 18 Dec 2013 15:05:10 GMT

Im going to change things up a little bit, so could use a little more help. Instead of having a menu, i want to just create 2 more rows on the excel file. What I want to happen is that when you run the gui, labview picks the first row from the excel file, reads in the valve # and intensity for the standard, and same for the odor. What else would I need to do to make this happen?

Re: mouse down help

altenbach — Wed, 18 Dec 2013 16:47:06 GMT

First of all, your VI does NOT read an excel file in any shape or form, it simply reads a comma delimited text file. Don't confuse the two. (Of course excel can also read .csv files, but that does not make it an excel file).

@HePlayGame wrote:

What I want to happen is that when you run the gui, labview picks the first row from the excel file, reads in the valve # and intensity for the standard, and same for the odor.

Well, you should simply take away of lot of the existing code, since this is a simpler task. Where did you encounter problems?

This still does not sound like a complete specification. What should happen after it reads the first line? (program exit? wait for input? Go to the next line in a button press? etc.)

Re: mouse down help

HePlayGame — Wed, 18 Dec 2013 18:56:52 GMT

My problem is that only the last line of the csv file is being read and implemented. I want labview to read the first line, which contains A valve number for the standard, an intensity for the standard, and a valve number for the adjustable odor. These numbers are then used in labview to select the appropriate valve using the Daq, turn it on for the standard, and allow me to adjust the adjustable. When I press the next button, I want the second line to be read, and so on.

Re: mouse down help

altenbach — Wed, 18 Dec 2013 19:20:17 GMT

Why don't you also show us a typical input file?

Re: mouse down help

HePlayGame — Wed, 18 Dec 2013 20:11:58 GMT

Here is an example of a typical entry file