how to simulate an lcd using labview

[maheswaris_tr@hcl.in]

hi

i need to simulate a graphical lcd in pc using labview?(7.1).

i have posted this earlier and got replies.but i  wish to know how to create the lcd screen?

i think i can make use of booleans.but i need the  exact details for creating the graphical screen.

and on how to make each pixel glow(i.e., ON and OFF)

can anyone help me out in this issue..

regards

mahi

[GerdW]

Hello Mahi,

just make up an array of LEDs and switch them on/off as needed...
You can also use an array of color controls, this way you can control the color more easily.
Or you use an intensity graph (with a predefined color scale). So many possibilities...

[Tushar_Jambhekar]

go on this site you will get the LCD Font just install it and then you can use simple String control to show LCD data. i think this option will much simple to use and much more light weight than using picture control, 3D intensity graph etc.

http://www.twyman.org.uk/Fonts/

[maheswaris_tr@hcl.in]

hi GerdW

i have some sample VIs.i shall send u them.can u tell me how are they created using booleans.

i couldn find it out.kindly send me ur id so that i can send them.

regards

mahi

[GerdW]

Hello mahi,

when you write a forum entry there is a "Attachment" field below the text input.
Just add your vi (or several vi's saved as llb) so all forum participients can have a look at them.

[Bart Boshuizen]

You could do this with a 2-D array of booleans.
Put an array placeholder on the front panel and put a boolean indicator in
it and add a dimension to the array. Make the border of he indicator
transparent and resize the indicator to the smallest size possible. See
http://www.morechemistry.com/lcd/lcd.html for sample vi's in LabVIEW 6.1.

"maheswaris_tr@hcl.in" <x@no.email> wrote in message
news:1149664209402-375221@exchange.ni.com...
> hi
> i need to simulate a graphical&nbsp;lcd in pc using labview?(7.1).
> i have posted this earlier and got replies.but i&nbsp; wish to know how to
create the lcd screen?
> i think i can make use of booleans.but i need&nbsp;the &nbsp;exact details
for creating the graphical screen.
> and on how to make each pixel glow(i.e., ON and OFF)
> can anyone help me out in this issue..
> regards
> mahi

[maheswaris_tr@hcl.in]

GerdW

herewith i have attached those VIs.kindly let me know about the details of the booleans.

regards

mahi

[GerdW]

Hello mahi,

as suggested elsewhere, I changed the cluster to a control and (by using Unbundle function) had a peek at the cluster format definition.
This LCD vi uses a 9×6 points scheme for each char. Each char is composed of 9 clusters, each containing 6 booleans. The ASCII-DMD.vi is converting the ASCII code to the LCD/cluster representation of the char.

I think my approach of using a 2d array of booleans is much simpler. It also allows for proportional chars and scrolling 🙂

[daveTW]

Hello Mahi,
I just jumped into this thread and remembered, that a few years ago I had a project to generate c-sources (actually header files to be included into c sources) to show custom made characters on an lcd display. As a side effect it creates what you need, a 3D- boolean array, where every 2D- portion holds a character.
With this program you can define the size of the character and alter it the way you need it. You can import a bmp- file with characters you need (e.g from a screen copy, must be a 1-bit bmp, black&white) and copy little frames from it to make work easier. If you click in the menu at "Fonts->Save Bool Spreadsheet" a text-file will be created which is in spreadsheet-style, where every cell (if you open it in Excel) consists of 0 and 1 according to the character. If you scroll down the front panel, you will find the 3D- Bool array which represents this data.
Just try it, the top-VI is "Fonts V2.vi", it should run properly. I put some screen-copy-bmp file and *.h- files into the zip to make the test easier for you.
I hope this helps,
Dave

[maheswaris_tr@hcl.in]

hi dave

am using labview version 7.1 an d 6.So am unable to view the VIs you have attached.

So can you plz send me the VIs in any of these lower version.

regards

mahi