how to create 4 bit lfsr in labview

[Wayne.C]

My previous post told you exactly what was to the left of the loop. 

If you can't figure out the difference between a FOR loop and a WHILE loop you have much bigger problems than designing a LFSR.  The attachment  http://courses.ece.uiuc.edu/ece463/SP08/labs/LVtraining/LVtutorial.htm  in your previous post even identifies which is which.

[deano11]

Yes i have found out that it is a FOR loop.I am now trying to locate the 8bit integer and the boolean array...how do i navigate to these features. Also when i added the 4 shift registers on the left hand side, they came up on the right hand side as well. How do i obtain just one shift register on the right hand side of the for loop as shown on your diagram. Thanks.

[TWGomez]

One shift register. On left side right click and Add Element.

[deano11]

TwGomez, i know how to add shift registers. My problem is when i add four on the left hand side, four will appear on the right. What i am trying to do is get four on the left and then one on the right, the full diagram i am trying to achieve is in the link below.

http://forums.ni.com/attachments/ni/170/315341/1/4%20bit%20LFSR.PNG

[TWGomez]

Read more carfeully, I'll re-explain it...

Add one shift register (which you know how to do).

Right click on the left side of the shift register and select "Add Element" and that will do what you want....

[Wayne.C]

Or you could read this NI document on loops and shift registers.  http://zone.ni.com/reference/en-XX/help/371361D-01/lvconcepts/for_loop_and_while_loop_structures/

[deano11]

Thanks TWGomez your're a lifesaver! Now how do you navigate to the 8bit integer and boolean array? They are situated to the left of the shift registers. The link is posted below. Anyone can help if they want to as well, thanks.

http://forums.ni.com/attachments/ni/170/315341/1/4%20bit%20LFSR.PNG

[deano11]

thanks guys i got it working !!! YESSSSSSSSSSSSSS . I am now wondering whether you guys could help me on another question....:manwink:.

1. Show, using LabVIEW, how a BILBO can be used as a pseudo-random pattern generator.

Can you guys help????????????????

[TWGomez]

Is this a homework assignment?

Dn't you have rules against using forums for help with homework?

Anywho you already have the answer...

[deano11]

Well i already had the info, and i just needed a little help putting it all together. Besides it was  a research assignment and we were allowed to use the internet. The fact is i've learnt a lot thanks to you guys.

Anyways, you say i have the answerr?  I know the circuilt can be used as a BILBO, but i thought you had to add extra bits into it?????? Please tell me if this is the case..or not.... Thanks