Stateflow User's Guide Previous page   Next Page

Setting Properties for Individual Charts

You set most of the properties for a chart as an individual chart. To specify properties for a chart of a Stateflow block, do the following:

  1. Double-click on a Stateflow block to open its diagram in the Stateflow diagram editor.
  2. Right-click an open area of the Stateflow diagram.
  3. From the resultant context menu, select Properties.
  1. The properties dialog for the chart appears, as shown:

  1. Enter properties for the chart based on the following descripitons:

    Field
    		 Description 
    Name
    		 Stateflow diagram name; read-only; click this hypertext link to bring the chart to the foreground.
    Parent
    		 Parent name; read-only; click this hypertext link to display the parent's property dialog box.
    Machine
    		 Simulink subsystem name; read-only; click this hypertext link to bring the Simulink subsystem to the foreground.
    Update method
    		 Stateflow lets you specify the method by which a simulation updates (wakes up) a chart in Simulink. Choose from Inherited, Discrete, or Continuous. For more information, see Setting the Stateflow Block Update Method.
    Sample Time
    		 If Update method is Sampled, enter a sample time.
    Enable C-bit operations
    		 Select this box to recognize C bitwise operators (~, &, |, ^, >>, and so on) in action language statements and encode them as C bitwise operations.
    If this box is not selected, the following occurs:
    • & and | are interpreted as logical operators.
    • ^ is interpreted as the power operator
      (for example, 2^3 = 8).
    • The remaining expressions (>>, <<, and so on) result in parse errors.
    To specify this interpretation for all charts in the model (machine), select the Apply to all charts in machine now button.
    User specified transition execution order
    		 Select this box to switch to explicit ordering of transitions. In this mode, you have complete control of the order in which transitions originating from a source are tested for execution. For more information, see Transition Testing Order.
    Export Chart Level Graphical Functions
    		 Exports graphical functions defined at the chart's root level. See Exporting Functions for more information.
    Use Strong Data Typing with Simulink I/O
    		 If this option is selected, the Chart block for this chart can accept intput signals of any data type supported by Simulink, provided that the type of the input signal matches the type of the corresponding chart input data item (see Sharing Input and Output Data with Simulink). If the types do not match, a type mismatch error occurs.
    If this item is cleared, the chart accepts and outputs only signals of type double. In this case, Stateflow converts Simulink input signals to the data types of the corresponding chart input data items. Similarly, Stateflow converts chart output data (see Sharing Input and Output Data with Simulink) to type double if this option is not selected.
    For fixed-point data, see the note following this table.
    Execute (enter) Chart at Initialization
    		 Select this option if you want a chart's state configuration to be initialized at time 0 instead of at the first occurrence of an input event.
    Debugger breakpoint: On chart entry
    		 Select to set a debugging breakpoint on entry to this chart.
    Editor: Locked
    		 Select to mark the Stateflow diagram as read-only and prohibit any write operations.
    Description
    		 Textual description/comment.
    Document Link
    		 Enter a Web URL address or a general MATLAB command. Examples are www.mathworks.com, mailto:email_address, and edit/spec/data/speed.txt.

  1. Select one of the following buttons:

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