Stateflow User's Guide

Rules for Using Temporal Logic Operators

The following diagram illustrates the use of temporal logic operators in action language:

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The following rules apply generally to the use of temporal logic operators:

• The recurring event on which a temporal operator operates is called the base event. Any Stateflow event can serve as a base event for a temporal operator.

Note    Temporal logic operators can also operate on recurrences of implicit events, such as state entry or exit events or data change events. See Defining Implicit Events.

• For a chart with no Simulink input events, you can use the wakeup (or tick) event to denote the implicit event of a chart waking up.
• Temporal logic operators can appear only in conditions on transitions originating from states and in state actions.

Note    This means you cannot use temporal logic operators as conditions on default transitions or flow graph transitions.

• The state on which the temporally conditioned transition originates or in whose during action the condition appears is called the temporal operator's associated state.

• You must use event notation (see Temporal Logic Events) to express temporal logic conditions on events in state during actions.

Using Temporal Logic in Actions

after Temporal Logic Operator

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