By Luciano Lavagno, Grant Martin, Bran V. Selic

The complexity of such a lot real-time and embedded structures frequently exceeds that of alternative varieties of structures considering that, as well as the standard spectrum of difficulties inherent in software program, they should care for the complexities of the actual global. That world―as the proverbial Mr. Murphy tells us―is an unpredictable and sometimes unfriendly position. as a result, there's a very robust motivation to enquire and follow complex layout tools and applied sciences which may simplify and enhance the reliability of real-time software program layout and implementation. therefore, from the 1st models of UML issued within the mid 1990’s, designers of embedded and real-time structures have taken to UML with vigor and exuberance. even though, the dream of a whole, model-driven layout move from specification via automatic, optimised code iteration, has been tricky to understand with out a few key advancements in UML semantics and syntax, in particular specific to the real-time structures challenge. With the improvements in UML which have been proposed and are close to standardisation with UML 2. zero, a lot of those advancements were made. within the Spring of 2003, adoption of a formalised UML 2. zero specification through the contributors of the article administration team (OMG) turns out very shut. it's for this reason very acceptable to check the prestige of UML as a suite of notations for embedded real-time structures - either the cutting-edge and top practices accomplished as much as this time with UML of prior generations - and the place the alterations embodied within the 2.

Show description

Read or Download Academic-Uml For Real Design Of Embedded Real-Time Systems PDF

Similar microprocessors & system design books

Everything You Can Do With Your Commodore 64

Booklet through Peddicord, Richard G.

Robust Speech Recognition in Embedded Systems and PC Applications

Powerful Speech popularity in Embedded structures and computing device purposes offers a hyperlink among the expertise and the applying worlds. As speech reputation expertise is now more than enough for a few functions and the center know-how is easily confirmed round hidden Markov versions some of the ameliorations among platforms present in the sphere are with regards to implementation variations.

Memory Controllers for Real-Time Embedded Systems: Predictable and Composable Real-Time Systems

Verification of real-time specifications in systems-on-chip turns into extra complicated as extra purposes are built-in. Predictable and composable structures can deal with the expanding complexity utilizing formal verification and simulation. This publication explains the techniques of predictability and composability and exhibits tips on how to practice them to the layout and research of a reminiscence controller, that is a key part in any real-time method.

Additional info for Academic-Uml For Real Design Of Embedded Real-Time Systems

Sample text

16 Chapter 1 [11] Object Management Group, Model Driven Architecture (MDA), OMG document ormsc/2001-07-01, Needham MA, 2001. 5, OMG document formal/2003-03-01, Needham MA, 2003. [13] G. Booch , J. Rumbaugh, and I. , Reading MA, 1999. [14] J. Rumbaugh, I. Jacobson, and G. , Reading MA, 1999. 0, OMG document formal/02-04-01, Needham MA, 2002. [16] Object Management Group, Software Process Engineering Metamodel (SPEM), OMG document formal/02-11-14, Needham MA, 2002. [17] Object Management Group, UML Profile for Enterprise Application Integration (EAI), OMG document ptc/02-02-02, Needham MA, 2002.

5, September 2002). They are described in terms of states and transitions where a state is attached to a given action (ActionState) or a sub-activity (SubactivityState) representing nested activities that ultimately resolve to individual actions. Action states are attached to atomic actions: it is left only when the action is completed. Action states have some duration corresponding to the processing of the action. As they are built from a set of state actions (or other sub-activity states), sub-activity states have also some duration.

In this way, they may pre-empt each other depending on their priority. If an active object is handling an event it cannot be pre-empted to manage a new incoming event even if this one has higher priority. However, if another active object is receiving an event and the flow of control of the active object has higher priority than the flow of control of the previous running active object, it will pre-empt this latter in order to manage the incoming event. In the UML, it is possible for more than one transition to fire at the same time.

Download PDF sample

Rated 4.35 of 5 – based on 46 votes