Stateflow User's Guide

Options for Assigning Actions to Decisions in Truth Tables

In Assigning Truth Table Actions to Decisions, you assign actions to decisions in a truth table as part of programming a truth table. Stateflow allows you to be very creative in assigning actions. The following is a list of rules that apply to assigning actions to decisions in a truth table.

• You specify actions for decisions by entering a row number or a label in the Actions row cell of a decision column.

• If you use a label specifier, the label must be entered with the action in the Action Table.

• You must specify at least one action for each decision.

• Actions for decisions are not optional. Each decision must have at least one action specifier that points to an action in the Action Table. If you want to specify no action for a decision, specify a row that contains no action statements.

• You can specify multiple actions for a decision with multiple specifiers separated by a comma.

• For example, for the decision column D1 you can specify A1, A2, A3 or 1, 2, 3 to execute the first three actions if decision D1 is true.

• You can mix row number and label action specifiers interchangeably in any order.

• The following example uses both row and label action specifiers.

  

• You can specify the same action for more than one decision, as shown.

  

• Row number action specifiers in the Actions row of the Condition Table automatically adjust to changes in the row order of the Actions Table.

• In the following example, decisions D3 and D4 are assigned the actions in rows 3 and 4 of the Action Table, respectively.

  

  Select row 4 in the Action Table and select the Move Row Up tool to reverse rows 3 and 4, and notice the change in the action specifiers for columns D3 and D4, as shown.

  

Debugging a Truth Table During Simulation

Truth Table Editor Operations

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