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• W2801406969 abstract "The research into Codesign of Hardware and Software stems from the development of embedded systems, on which various systems restrictions are imposed. Typical restrictions can be the overall time (latency) to complete an assigned function and the space/power limits within the system. Although software can be used to undertake most tasks in an embedded system, ASIC (Application Specific Integrated Circuits) hardware components sometimes have to be recruited to meet the system constraints. Designing the restricted embedded system with both software and hardware components in it involves the analysis of not only individual hardware/software components but also their mutual influences. Using co-design principles, the approach is to consider both hardware and software from a coherent viewpoint.This thesis presents the results from our research project in the area of Codesign of Hardware and Software. In this project, we investigated previously published codesign approaches and their methodological supports. The investigation has identified shortcomings and problems with the existing codesign methodologies. A new object-based codesign approach (Co-PARSE) is thus developed in this project, which is supported by successive phases, guidelines, and techniques. This methodology offers a coherent design framework for real-time embedded systems and incorporates the criteria of system performance and hardware cost. Tools have been developed to facilitate the use of the methodology. Within the methodology, a high-level system modeling and specification approach has been developed and formalised in the Co-BSL (Codesign Behavior Specification Language). The means of transforming Co-BSL specifications to C and VHDL implementations is defined, and a library of VHDL components provided. The thesis documents the partitioning approach taken within the methodology and proposes a new multi-layered bus architecture as a basis for more flexible and efficient implementations. A means of simulating the performance characteristics of this architecture under different configurations is provided, and examples of simulation results are presented. A new embedded system (the Radio Data Computing System) is designed and simulated in the Co-PARSE methodology and simulation results analysed. The thesis concludes with an evaluation of the work carried out in the project and proposals for extending the results obtained in future research.The major contributions reported in this thesis can be summarised as follows. First, the unified system specification means has been designed, which is embodied in the Co-BSL. It captures overall dynamic aspects and performance constraints in the system under development. This high-level specification language is independent of implementation and does not bias the designer towards the use of hardware or software components at this early stage. Second, within Co-PARSE, the target architecture of the system under development has been exploited to improve the system performance and at the same time to reduce hardware cost. This novel concept has been realised by the introduction of an asynchronous bus protocol and the multi-layer bus communication structure. Third, in order to evaluate the strength and practicability of the Co-PARSE methodology, an extensive case study has been carried out. The new RDC (Radio Dada Computing) System has been designed in the proposed codesign approach. Codesign phases are subsequently applied and the guidelines and tools that are specially developed in support of the methodology are fully utilized." @default.
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• W2801406969 date "2001-01-01" @default.
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• W2801406969 title "An object-based codesign methodology" @default.
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