introduces the key factors involved in the design of an embedded system, . area is today known as hardware/software codesign, providing a global view of the Basically, the automation of the global hw/sw design approach, that .. applications is the scope of SpecSyn, TOSCA, Co-Saw and Polis, while the activity of. Hardware-Software Co-Design of Embedded Systems: The POLIS Approach is Page – A formal specification model for hardware/software codesign. COSYMA (COSYnthesis for eMbedded micro Architectures) is a platform for Hardware-Software Co-Design of Embedded Systems: The Polis Approach.

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For each chosen architecture SynDEx proposes the best implementation of the algorithm application onto this architecture. The project intends to develop a codesign methodology and associated tools. A priori definition of partitions, which leads to sub-optimal designs.

Jerraya, Automatic generation of interfaces for distributed c-vhdl cosimulation of embedded systems: These systems are stored in a system library.

A graphical user interface has been developed to specify these systems in a structural and hierarchical way.

This model of computation can also be described as Globally Asynchronous, Locally Synchronous. Note this architecture is a “multicomponent architecture” which means the architecture is composed of programmable components processors possibly of different types and of non-programmable components ASIC, FPGA alltogether connected by communication media possibly of different types. This permits the use of a broad range of target FPGA-architectures. For concurrent and interactive design, we need to provide the following capabilities: Page – G.

Design is done in a unified framework, POLISwith a unified hardware-software representation, so as to prejudice neither hardware nor software implementation.


The description is also analyzed with a hardware estimator which writes the estimation result to the same database as the profilers. Due to the problems they want to solve, this project is more concentrated on the formal specification, formal verification and co-simulation. Design of embedded systems can be subject to many different types of constraints, including timing, size, weight, power consumption, reliability, and cost.

So far, the system has mainly been used for design-space exploration where it gives fast response times which are not available in a purely manual design process. The main objective of COOL is heterogeneous implementation.

The architecture of the system has to be provided by the user. The Polis Approach F. Polis Publications Chinook the tool is not available on-line Chinook is a hardware-software co-synthesis CAD tool for embedded systems.

Unlike most of the other tools cosyma, cosmos, etc. It is not for circuit synthesis. Some examples of applications of embedded controllers are: Thus, the POLIS system which is a hrdware-software environment for embedded systems is based on a formal model of computation. The problems they want to solve can be found in the preface of their book pp.

Hardware-software partition is decided a priori and is adhered to as much as is possible, because any changes in this partition may necessitate extensive redesign. In our opinion, none of them address satisfactorily the issues of unbiased specification and efficient automated synthesis for control-intensive reactive real-time systems. In addition, the graphical user interface is used to define target architectures and design constraints.

Formal verification and automatic synthesis of implementations are the surest ways to guarantee safety.

Generally, software is used for features and flexibility, while hardware is used for performance. A synchronous hardware implementation of CFSM can execute a transition in 1 clock cycle, while a software implementation will require more than 1 clock cycle. The target architectures are organized in a target architecture pois too.


Hardware/Software Codesign Group

Beginning with rather small target architectures and single input programs it has developed into a design system for fairly complex time constrained multi process systems and larger heterogeneous target architectures.

When the user or tool have selected a hardware and codesivn partition, it is written to the database.

It is designed for control dominated, reactive systems under timing constraints, with a new emphasis on distributed architectures. The environment also builds upon existing synthesis and compilation techniques by encapsulating them and supports system design flows by providing design methodology management support Large heterogeneous systems are often composed of several components, such as microprocessors, dedicated hardware, external devices, and memories, interconnected by general or local buses, using a variety of communication protocols.

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A Framework for Hardware-Software Co-Design of Embedded Systems

Use of codesiign languages such as C helps structure the design somewhat, but with increasing complexity it is not sufficient. The Polis Approach Kluwer international systeems in engineering and computer science: The design flow that is currently implemented in the POLIS system is depicted in the following figure and is described more in detail below. Gajski No preview available – While both perform the same computation for each CFSM transition, hardware and software exhibit different delay characteristics.