Stateflow

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Stateflow
Automatic Transmission Logic.png
Control logic for an automatic transmission system
Developer(s) MathWorks
Stable release R2014a / March 6, 2014; 9 months ago (2014-03-06)
Preview release R2014b / June 11, 2014; 6 months ago (2014-06-11)
Development status Active
Operating system Cross-platform[1]
License Proprietary
Website Stateflow product page

Stateflow, (developed by MathWorks), is a control logic tool used to model reactive systems via state machines and flow charts within a Simulink model. Stateflow uses a variant of the finite-state machine notation established by David Harel, enabling the representation of hierarchy, parallelism and history within a state chart.[2] Stateflow also provides state transition tables and truth tables.

Common Uses[edit]

Stateflow is generally used to specify the discrete controller in the model of a hybrid system where the continuous dynamics (i.e., the behavior of the plant and environment) are specified using Simulink.[3][4]

Specific applications for Stateflow include:

  • Mode logic, where each discrete mode of a system is represented by a state[5]
  • Fault management, where the Stateflow chart is used to control how the system responds to faults and failures within a system[6]
  • Task scheduling, where the Stateflow chart is used to schedule when specific tasks occur, either within the Stateflow chart or within the overall Simulink model[7]

Extensions[edit]

A number of MathWorks and third-party tools can be used with Stateflow to validate the design and generate code. For example, Simulink Verification and Validation, a MathWorks tool, can be used to check for requirements traceability and model coverage analysis. Other add-on code generation tools can be used to automatically generate C, C++, HDL, and PLC code for implementation on embedded systems.

References[edit]