You will greatly benefit by applying some basic "Good LabVIEW Style" guidelines to your Block Diagrams. Here are a few important starters:
- Keep your Block Diagram small enough to fit on a Laptop Screen (formerly 640 x 480, now 1920 x 1080, about 8 times the area).
- Make your wires run left-to-right, with as few bends as possible.
- Use the Error Line to "serialize" your code. Most functions and almost all VIs should "sit" on the Error Line (lower left/lower right of 4-2-2-4 connector pane).
- Use Sub-VIs to "hide the messy details". Give the sub-VIs "meaningful names" and an Icon (even a Rectangle with 2-4 short words).
For what you are trying to accomplish, I would recommend something like a State Machine (perhaps something as simple as a While Loop surrounding a Case Statement, with the Loop Index, "i", wired to the Case Selector and the "Cases" being "0", "1", "2", ..., <last case #>, "Default", where the "Default" "catches" all the numbers you don't specify. Note that when this runs, it automatically does the "steps" from 0 to <last case #>.
As for your variables, put a bunch of Shift Registers up at the top and use them to "hold" the Variables. Wire them "through" the Case Statements. Because they are on Shift Registers, they will all hold "the latest values" of these variables, there are no "race" conditions, all the Variables are in one place and easily visible to any Case, and if you want to do an operation (say, add A to B and put the result back in A, leaving B intact), you put in "Add" in the appropriate "Case", drop a wire from the "A Wire" and "B Wire" to the input of the Add, delete the wire going to the Case output tunnel for A, and wire the output of the Add to that tunnel. Of course, you can do multiple arithmetic operations in each Case, and you can also organize it so you do, for example, all your "Build Matrices" in one Case, your "Use Matrices" in another, etc.
Note that there are more "elegant" ways to do this, but this should get you started thinking about Data Flow programming, on which LabVIEW is based, with (for LabVIEW) the data "flowing" in the wires.
A Clean Block Diagram is so much easier to create/build/use/debug/understand than a chaotic mess. Data Flow Is Your Friend!
Bob Schoe
