P. Altenbernd. CHaRy: The C-Lab Hard Real-Time System to Support Mechatronical Design. In Proceedings IEEE International Symposium and Workshop on Systems Engineering of Computer Based Systems. IEEE Computer Society Press, 1997.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....Therefore, the overhead due to additionally required runtime services and bindings is avoided. In the research eld of system speci cation and synthesis there exist di erent approaches towards automatic generation of embedded real time applications. The German national project SFB 501 [1,2] deals with the synthesis of systems out of ready made SW components. Its overall goal is to create the application and its tailor made runtime platform out of components. The view of a system is a collection of customized components. They have a local sight onto the whole system. Each component ....

....cation is supported as well as a time dependent ring of transitions. But the main idea of SEA is to combine the Pr T Net formalism with an abstract graphical representation. This leads to an application oriented representation of models abstracting from the underlying Pr T Nets [23, 36] CHaRy [2] is a software synthesis system for periodic controller applications, where hard real time conditions must be guaranteed. Due to complexity reasons, CHaRy decomposes the overall problem of implementing periodic controllers on parallel embedded computers to the sub problems partitioning, timing ....

P. Altenbernd. CHaRy: The C-LAB Hard Real-Time System to Support Mechatronical Design. In Proc. of the International Conference on Engineering of Computer Based Systems (ECBS-97), Monterey, California, March 1997.

....Paderborn and Siemens AG 1 available at: http: www.c lab.de sea systems. Besides the modeling tool SEA we use standard analysis tools for Petri Nets [2, 3] as well as two synthesis tools developed at our lab. For the synthesis of real time software we use CHaRy (C LAB Hard Real time System) [4]. In order to generate synthesizable VHDL code PMOSS (Paderborn MOdular System for high level Synthesis and HW SW CodeSign) 5] is used. On the way from building a model of an embedded real time system down to the final step of deriving an implementation there are a lot of subproblems to solve. ....

P. Altenbernd. CHaRy: The C-LAB Hard Real-Time System to Support Mechatronical Design. In Proc. of the International Conference on Engineering of Computer Based Systems (ECBS-97), Monterey, California, March 1997.

....within the German project METRO and tested with a realistic application example, the combination of a conventional and an electronic drive. This platform uses a parallel, distributed approach. For the distribution of the process and subsystems on the processor network the algorithms presented in [1] will be used. For the realization of the discrete part of the system different solutions were presented. The selection of the solutions depends, for example, on the timing requirements to be fulfilled. One of the tasks for the future will be to experiment with these different solutions and to ....

P. Altenbernd. CHaRy: The C--LAB Hard Real--Time System to Support Mechatronical Design. Submitted to: ECBS'97.

....even more likely to be missed due to disabled interrupts. Fortunately, interrupts are expected events in RTC since the behavior of the environment is usually known. Planing events for both cases at the expense of some system overhead (software priorities) is subject to current research (e.g. see [1]) On the other hand, the Dreams run time platform is further extensible to multi threaded system [4] That scenario requires to customize the Processor as a Resource which is serialized by a Scheduler. A time sliced roundrobin scheduler is implemented like a clock device: It is comparable to a ....

P. Altenbernd. CHaRy: The C-LAB hard real-time system to support mechatronical design. In Int. Conf. and Workshop on Engineering of Computer Based Systems (ECBS), 1997.

....in [27] Future work should also include research with regard to systems consisting of non identical processors, and heterogeneous processor networks. The Slack Method will be used as a preprocessing step for non guided search within the software architecture CHaRy (C LAB Hard Real Time System) [5]. The goal of CHaRy is to automatically derive distributed hard real time implementations from higher lever descriptions, including timing analysis, allocation and schedulability analysis. CHaRy was originally developed for grid architectures. Currently CHaRy is extended towards bus interconnected ....

Peter Altenbernd. CHaRy: The C-LAB Hard Real-Time System to Support Mechatronical Design. In Proceedings of the International Conference and Workshop on Engineering of Computer Based Systems ECBS'97, pages 271--278, 1997.

....by CHaRy. In turn, it is possible to automatically derive a feasible implementation of the system specified by SCs. 1 Introduction The purpose of this work was to develop a cross compiler from a text phrase representation of Software Circuits (SCs) 4] to the CHaRy Control Flow Language (CCFL) [1]. SCs are used for modelling the software of complex real time applications within the Basement system [3] Basement is a distributed real time architecture designed for vehicle internal communication and execution. The hardware (i.e. the processor network) is supposed to be bus interconnected. ....

.... Figure 1: Software Circuits example SCs describe periodic processes as precedence graphs, in which each vertex represents the instance of a Programmed OPeration (POP) Processes represent a number of computations running with the same periodicity (sometimes referred to as a transaction [1]) POPs represent instances of basic computation units which can be connected in order to fulfil the required task. The directed edges in the precedence graph can be used for exchanging data values between POPs (communication) For hierarchical clustering it is possible to consider whole SCs as ....

Peter Altenbernd. CHaRy: The C-LAB Hard Real-Time System to Support Mechatronical Design. In Proceedings of the International Conference and Workshop on Engineering of Computer Based Systems ECBS'97, pages 271--278, 1997.

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P. Altenbernd. CHaRy: The C-Lab Hard Real-Time System to Support Mechatronical Design. In Proceedings IEEE International Symposium and Workshop on Systems Engineering of Computer Based Systems. IEEE Computer Society Press, 1997.

No context found.

Peter Altenbernd. CHaRy: The C-LAB Hard Real-Time System to Support Mechatronical Design. In Proceedings of ECBS'97, Monterey, CA, 1997.

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