state machine::how to

[mangood]

hi

i try to implement this state machine send below

where x :input and y output where both stream of one and zero

i read some tutorial i just need some help to complete the vi.

thank in advace

regards

m.s 

[Ray.R]

I'm trying to understand your state machine...

You need to identify which state is which.  Your event is a new value of X.  Depending on the outcome it goes to a new state which assigns a value to Y.  Is that correct?
If so, at this state I would give the states an identifier.  It will allow you to create your state machine. 

You can use names or numbers (although names are a much better approach).

So the next thing to do is to drop a Case Structure inside your While Loop.

For the sake of an exercise and ability to explain, you could call them from left to right:

One, Two, Three, Four, Five, Six.

You can then create a type def enumerator and fill in those 6 names.

You then populate the entire Case Structure with those matching names.

Based on which state (case) you're in, you then go to the next state (case) based on the new value of X.  That's where the Shift Registers are useful.

[Eric_LV · Accepted solution]

State machines require a few things that you are missing from your VI.  Most importantly you are missing a Case Structure.  The Case Structure will perform different code based on which state you are in.  You also will need something that identifies which state you are in.  Usually this is a Enumerator. Inside the case structure you need to have code that will determine which state will be next.  In your case the value of x is what determines the next state.  Check out this VI Snippet, it should look similar to what you are trying to do.  

[Ray.R]

The shift register will provide the index to the Case Structure to which case is selected in the next iteration.  Within the Case, you can assign the new value for Y.

So that you can see what is going on, you may want to set a trigger....  If we keep it simple, you could create a popup message showing you the values for X & Y at the exit of the While Loop and also mention which State (One, Two... ) you were in.

[mangood]

Eric_L and Ray.R thank a lot it work

kudos for you

best regards

m.s