Gerçek Zamanlı Gömülü Sistemlerin Durum Diyagramları ile Modellenmesi

Öz

Gömülü gerçek zamanlı sistemler, Birleşik Modelleme Dili’nin en başarılı uygulama alanlarından biridir. Durum diyagramları davranış modellemesi için kullanılan Birleşik Modelleme Dili tekniklerinden biridir. Durum diyagramları bir sistemdeki kontrolü ve sıralamayı modellemek için kullanılır. Bu özellikle, büyük ölçüde duruma bağlı olan gerçek zamanlı gömülü sistemler için önemlidir. Duruma bağlı olarak çalışan sistemlerin anlık eylemleri yalnızca sistem girdisine değil aynı zamanda sistemde daha önce ne olduğuna da bağlıdır. Bu sebeple, her durumun önem taşıdığı gerçek zamanlı gömülü sistemleri durum diyagramları ile modellemek daha doğru sonuçlara ulaşmak açısından önem taşımaktadır. Bu çalışmada, gerçek zamanlı gömülü sistemlerin modellenmesi için durum diyagramlarının kullanımı ve çeşitleri kod-diyagram dönüşümlü örnekler üzerinde açıklanarak incelenmiştir.

Anahtar Kelimeler

• gerçek zamanlı
• gömülü sistemler
• durum diyagramı
• SCXML
• UML

Modeling Real-Time Embedded Systems with State Charts

Abstract

Embedded real-time systems are one of the most successful application areas of Unified Modeling Language. State diagrams are one of the Unified Modeling Language techniques used for behavior modeling. State machines are used to model the controlling and sequencing of a system. This is especially important for real-time embedded systems that are highly state-dependent. The instantaneous actions of state-based systems depend not only on system input but also on what happened before in the system. For this reason, it is important to model real-time embedded systems with state machines in order to achieve more accurate results. In this study, the use and types of state machines for modeling real-time embedded systems are examined by explaining code-diagram alternating examples.

Keywords

• real time
• embedded systems
• statechart
• SCXML
• UML

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