Stateflow

Specifying Chart Properties

Part of a chart's interface to its Simulink model is set when you specify the properties for a chart. To specify properties for the chart open in Stateflow's diagram editor, do the following:

1. Right-click an open area of the Stateflow diagram.
2. From the resultant context menu, select Properties.

1. The properties dialog for the chart appears as follows:

   

The following table lists and describes the chart object fields.

Field	Description
Name	Stateflow diagram name; read-only; click this hypertext link to bring the chart to the foreground.
Simulink Subsystem	Simulink subsystem name; read-only; click this hypertext link to bring the Simulink subsystem to the foreground.
Parent	Parent name; read-only; click this hypertext link to display the parent's property dialog box.
Update method	Stateflow lets you specify the method by which a simulation updates (wakes up) a chart in Simulink. Choose from Triggered or Inherited, Sampled, 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-like 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.
No Code Generation for Custom Targets	Select this box to specify that no code is emitted when building for a custom target. This feature is useful for using Stateflow charts to simulate test environments during simulation testing before building to an actual embedded target.
Export Chart Level Graphical Functions	Exports graphical functions defined at the chart's root level. See Exporting Graphical 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 and output signals of any data type supported by Simulink. The type of an input signal must match the type of the corresponding chart input data item (see Defining Input Data). Otherwise, a type mismatch error occurs. If this item is cleared, this 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 Defining Output Data) to 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	Select On chart entry to set a debugging breakpoint on entry to this chart.
Editor	Select Locked 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.

Note    For fixed-point data, the Use Strong Data Typing with Simulink I/O option is always on. Therefore, if an input or output fixed-point data in Stateflow does not match its counterpart data in Simulink, a mismatch error results.

3. Select one of the following buttons:
• Apply to save the changes
• Cancel to cancel any changes since the last apply
• OK to save the changes and close the dialog box
• Help to display the Stateflow online help in an HTML browser window

Labeling Supertransitions

Checking the Chart for Errors