4 to 16 line decoder - is there an easier way in Labview?

[BarryGRAEllc]

CD41515 4 bit to one of 16 output decoder. Is there an easy way without drawing a full digital schematic?

http://www.onsemi.com/PowerSolutions/product.do?id=MC14515BDWR2 pdf has an example of what is required.

I need to decode a number (or 4 bit array) to a 1 of 10-16 indicator to show DAQ channel output activity.

Any clues?

Thanks,

Barry

[Jorge_Amaral]

is this what you want?

[Wayne.C]

What version of LV are you running?

[Ben]

Building on the previous reply ...

A quick approach:

Build the four booleans into an array then convert the array to a numeric.

Use the numeric to drive a case structure with 16 cases that have 16 boolean outputs.

Another way:

Use the output to drive the index of a "replace array subset' for an array of 16 false booleans and replace with a True.

Use Index array sized up for 16 outputs. Done.

Ben

[BarryGRAEllc]

LV 8.5

Below is what I have so far, just seems kinda cumbersome but it will fit into the 20 I/O connector I guess

[Wayne.C]

Simplest way I know.

P.S.  You could also take the output of this and convert to cluster for front panel display.

Message Edited by centerbolt on 04-03-2008 01:44 PM

[Ben]

Centerbolt posted

Maybe I am confused but I thought a 4-to-16 accepte four bits and returned 16 bits were only ONE of the returned lines was true at any time.

Ben

[Wayne.C]

Ben,

If you convert the integer 1 to 16bit binary there is only one bit set to a one.  All the rotate does is move that one to the right bit position.

Here is working vi.

[Wayne.C]

Here is an image that will make more sense from a bit sense.

[BarryGRAEllc]

Thanks centerbolt, that is slick and much better than the enclosed. LOL