Is there any way to put a boolean array into a case structure without the boolean array to number function?

[chasemcd1745]

Hi guys! Basically in my program, my "robot" (lego mindstorms EV3) has to read a barcode and do different things depending on which barcode it reads, and so  I have a boolean array, and I need it to basically compare it to other boolean arrays. First I used the "Boolean Array to Number" function, and then just put that into a case structure, but it turns out the boolean to number function is not compatible with my Lego EV3 brick, so I have to find another way to do this. Any ideas? 

Help is appreciated! If you have any questions or my question is confusing, just ask!

Thanks.

[altenbach]

Why do you even need a case strcuture to compare it to other boolean arays? Can you show us some code?

[chasemcd1745]

I've attatched my code there below. Basically I have a sensor reading 32 lines (either black or white), and then seperating them into 4 seperate barcodes (8 lines each), and then seperating each barcode into the first 3 lines which gives info about color, and then the last 5 lines, which gives info about how many of each size. And when I have the barcode into the specific number of lines, then i convert it into a decimel and whichever decimel it is has it's own case in the case structure which tells it what to output.  

For clarification, the first 3 lines show the color, so 001 (white white black) has a decimel of 1, which corresponds to a white marble, and so on.

[crossrulz]

Is Array Subset also not compatible?  Your code could be greatly simplified with that (eliminate a bunch of FOR loops).

How about Rotate Left With Carry, Logical Shift, and Slit Number?  Using these, I can greatly decrease your code.

Since I don't have the EV3 module installed, I used a random number generator to act as your barcode reader.

[chasemcd1745]

Yes, it turns out those are compatible with the EV3 module. I am still somewhat new to Labview, and programming in general, so I was unaware of these functions. Thanks so much for you answer, could you explain a little bit as to how these functions are used here, and how it eliminates the use of the binary to number function.

Thank you so much!

[crossrulz]

The Rotate Left With Carry along with the shift register is being used to actually make the 32-bit number.  This is assuming the Most Significant Bit is the first bit read.  If that is wrong, use the Rotate Right With Carry.

The Split Number slits the 32-bit number into two 16-bit numbers and then the 16-bit number into two 2 8-bit numbers.  So the result is four 8-bit numbers (4 bytes).

The AND is being used as a mask.  0 AND X (where X is 0 or 1) will be 0.  So if you AND a 0 with the bits you do not want and AND 1 with the bits you do want, you are just left with the bits you care about.  In this case, I masked off the upper 5 bits.

Then the Logical Shift shifts the bits.  In this case, I did a shift right 3 times in order to be left with the upper 5 bits.

[chasemcd1745]

But at the end, before the case structures, does your code end up with the same numbers as a binary to number function would?

[crossrulz]

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@chasemcd1745 wrote:

But at the end, before the case structures, does your code end up with the same numbers as a binary to number function would?

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The output of the FOR loop should come out to be the same as if you autoindexed the line and then used Boolean Array To Number.

[chasemcd1745]

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@crossrulz wrote:

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@chasemcd1745 wrote:

But at the end, before the case structures, does your code end up with the same numbers as a binary to number function would?

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The output of the FOR loop should come out to be the same as if you autoindexed the line and then used Boolean Array To Number.

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Can you tell me what I'm doing wrong here? Again, thanks so much for your help I'm still pretty new to Labview.

[crossrulz]

You should be using a shift register on the initial FOR loop for the number being rotated with the new bit.