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

Generally, software is used for features and flexibility, while hardware is used for performance. Design of embedded systems can be subject to many different types of constraints, including timing, size, weight, power consumption, reliability, and cost. Embedded systems are informally defined as a collection of programmable parts surrounded by ASICs and other standard components, that interact continuously with an environment through sensors and actuators. 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.

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. Large heterogeneous systems ot 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.

Beginning with rather small target architectures and hardware-xoftware input programs hardware-softaare has developed into a design system for fairly complex time constrained multi process systems and larger heterogeneous target architectures. Therefore, we are approacch a methodology for specification, automatic synthesis, and validation of this sub-class of embedded systems that includes the examples described above.

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Thus, the POLIS system which is a co-design plis for embedded systems is based on a formal model of computation. The Polis Approach Kluwer international series in engineering and computer science: The problems they want to solve can be found in the preface of their book pp.

A priori definition of partitions, which leads to sub-optimal designs. 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. This is a tool focussed on real-time systems. A graphical user interface has been developed to specify these systems in a structural and hierarchical way.

Ben Ismail, and A. For each chosen architecture SynDEx proposes the best implementation of the algorithm application onto this architecture. BEKKA – a heterogenous system level design environment. Generated hardware and software can be co-simulated before and after synthesis, behavioural and RT-level co-simulation. Designers often strive to make everything fit in software, and off-load only some parts of the design to hardware to meet timing constraints.

The target architectures are organized in a target architecture library too. Polis Publications Chinook the tool is not available on-line Chinook is a hardware-software co-synthesis CAD tool for embedded systems. 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 addition, the graphical user interface is used to define target architectures and design constraints.

Codesign Tools

The architecture of the system has to be provided by the user. Unlike most of the other tools cosyma, cosmos, etc. The Polis Approach F. My library Help Advanced Book Search.

Hardware/Software Codesign Group

The Complete List of Publications of the Project. Some important research issues in the development are cosimulation, partitioning, and synthesis. Some examples of applications of embedded controllers are: The CFSM specification is hardware-softwxre priori unbiased towards a hardware or software implementation. The POLIS Approach will be of interest to embedded system designers automotive electronics, consumer electronics and telecommunications hardware-softwwre, micro-controller designers, CAD developers and students.


The hardware and software components are derived from a single SDL-specification. It is closely related to DSP and Telecommunication. Current topics include synthesis of run-time support, communication synthesisand efficient and accurate co-simulation.

Due to the problems they want to solve, this project is more concentrated on the formal specification, formal verification and co-simulation. The partition tool exploits the implicit parallelism of the specified system. Lack of a well-defined design embededd, which makes specification revision difficult, and directly impacts time-to-market.

Account Options Sign in. The design flow that is currently implemented in the POLIS system is depicted in the following figure and is described more in detail below.

Specification Language and Methodology Daniel D. The system is divided into three components: The description is also analyzed with a hardware estimator which writes the estimation result to the same database as the profilers. Partitioning, Software generation, Hardware generation.

Ptolemy in the acronym is the design tool developed ststems the Univ. The difference between the two models is that the synchronous communication model of classical systemms FSMs is replaced in the CFSM model by a finite, non-zero, unbounded reaction time.

These systems are stored in a system library. Schedule validation for embedded reactive real-time systems. The environment also builds upon existing synthesis and compilation techniques by encapsulating them and supports system design flows by providing design methodology management support