Assign to simulink input in State Flow

My state flow accepts variables from Workspace as Inputs.

In one of the stateflow state blocks, there is a function call (which I wrote in matlab). This function receives those Inputs as arguments, modifies them during the run and returns them because I intend to pass them to other functions that are invoked in other states.

However, I get the following error:

Attempted to assign to simulink input.

I would appreciate any help to overcome this problem.

[TAB]

Please post the code/part of code/example code with your question.

It will be easy to understand what you want to do.

[Hs5555]

variable a is located at the workspace. In the state flow window there is a state that receives the a variable as an input. In one of the states, under the entry part, I wrote a function call:

[a] = FuncA(a);

this function receives variable a as an argument, assign a new value to it and returns it.

When I press run in the stateflow window, the diagnostic viewer window pops and gives the error message I mentioned above.

I guess that I cannot assign to an input that the stateflow receives so my questions are:

how should I define variable a in the stateflow so I can:

1. get its initial value from the workspace

and

2. modify it inside the stateflow in a way that it will be updated in the workspace?

I hope its much more clear now. thanks!

Answer 1

[Arunkumar M]

I think what you want to do is to start with the input value and then overwrite the input value later during simulation.

You can try one of the two methods:

1. assign a temporary variable say b in entry action (en: b = a), where a is your input variable. Later you can modify b and can use b also in your transition conditions. But in this, the variable a remains untouched
2. since your input variable a is stored in workspace, you can overwrite the variable a in workspace through assignin command. This lets your simulation to take the updated value from the next time step.

Answer 2

[Kai Gläsker]

Hello, maybe you switched the variables.

entry = Output Data

transition = Input Data