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Overview RKH is a generic, flexible, modular, highly portable, ANSI-C compliant, and open-source development tool for implementing hierarchical state machines based on modern state machine concepts. This modern techniques are used to give an abstract description of the dynamic behavior of a system in a substantial manner. ------------------------------------------------------------------------------ The main features of RKH - State machines representation is based on state tables. - Representing a state machine with RKH is intuitive, and easy. - Reflects the state diagram without obfuscation. - The RKH application are highly maintainable. - Easy to integrate with any event queuing and dispatching mechanism. - Useful in embedded systems. - The most of the RKH implementation is independent of any particular CPU, operating system, or compiler. - Flexible and user-configurable code generation. - Very small footprint. - Include a dispatching event mechanism based on active object's priority. - Include a queue module - Include a software timer module. - Include a fixed-size memory block module. - Include a native tracing tool. - Support hierarchically nested states, and flat state machine. - Support multiple state machines. - Support conditional, junction, and history pseudostates. - Support compound transitions with guards. - Support submachine state. - Support local transitions. - Support the entry and exit actions. - Implement the traditional transition sequence. - Include mechanism for deferring events. - Support event dispatching with parameters. - Include dynamic events. - Support a easy way to use events with arguments. - Support systems-friendly assertion macros like assert, allege, error, require, and ensure. ------------------------------------------------------------------------------ Purpose and inspiration For many years, I had been used the traditional state-machine concepts based on state-table strategy for modeling the dynamic behavior of several reactive-systems, in many industries. Over the years, this implementation was expanding its abilities to support system requirements increasingly complex, achieving hierarchically nested states, pseudostates, compound transitions, and more, proposed by Harel Statecharts. The RKH not implements neither entire UML specs. nor entire Statechart specs. Instead, the RKH intention is to support just enough basic concepts of that powerful tools to facilitate the reactive-system modeling holding a solid, and efficient implementation. Broadly speaking, the RKH implementation has been designed from the ground up to be used in 8-bits platforms but can be easily adapted to 16 or 32-bits platforms. ------------------------------------------------------------------------------ Other implementations Open-source frameworks that support Statecharts. Quantum Leap - http://www.state-machine.com/ Intelliwizard - http://www.intelliwizard.com/ ------------------------------------------------------------------------------ Licensing Copyright (C) 2010 Leandro Francucci. All rights reserved. RKH is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. RKH is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with RKH package. If not, see <http://www.gnu.org/licenses/>. (*) Observe that, the GPLv3 can be used for research & development and educational purposes (academic purposes). (**) When the source code of your application should not be published under the GNU GPLv3 license (closed source code), please, contact contact me. See Contact information section. ------------------------------------------------------------------------------ Contact information: RKH web site: http://sourceforge.net/projects/rkh-reactivesys/ e-mail: francuccilea@gmail.com ------------------------------------------------------------------------------
Source: README, updated 2013-02-06