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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Some examples of applications of embedded controllers are: The two executables are executed, and the captured profiling data is written to a data base as sysfems in figure 1.

The environment CoWare supports efficient heterogeneous co-simulation at different design levels by encapsulating the most appropriate simulation methods at those levels.

A graphical user interface has been developed to specify these systems in a structural and hierarchical way. The specification parts dedicated to hardware are then transformed into a VHDL description. Each element of a network of CFSMs aproach a component of the system to be modeled. Selected pages Title Page. Specification Language and Methodology Daniel D.

The partition tool exploits the implicit parallelism of the specified system. Due to the problems they want to solve, this project is more concentrated on the formal specification, formal hardware-softwafe and co-simulation. Some important research issues in the development codrsign cosimulation, partitioning, and synthesis.


This is a tool focussed on real-time systems. 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. For concurrent and interactive design, we need to provide the following capabilities: Gajski No preview available – The problems they want to solve can be found in the preface of their book pp.

The hardware and software components are derived from a single SDL-specification. The main objective of COOL is heterogeneous implementation.

Generally, software is used for features and flexibility, while hardware is used for performance. Page – G. Hardware-softwqre leave the decisions of partitioning and scheduling to the designers, and provide the designers with an environment to quickly evaluate their decisions through formal verification or system co-simulation. 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.

Hardware/Software Codesign Group

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. 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.

While both perform the same computation for each CFSM transition, hardware and software exhibit different approacy characteristics. This model is maintained throughout the design hardeare-software, in order to preserve the formal properties of the design. Other Papers by Dr.

Codesign Tools

There are many different academic approaches to try to solve the problem of embedded system design. A specification, often incomplete and written in non-formal languages, is developed and sent to the hardware and software engineers.


These systems are stored in a system library. This permits the use of a broad range of target FPGA-architectures. In our opinion, none of them address satisfactorily the issues of unbiased specification and efficient automated synthesis for control-intensive reactive real-time systems. Lack of a well-defined design flow, which makes specification revision difficult, and directly impacts time-to-market.

Unlike most of the other tools cosyma, cosmos, etc. Design is done in a unified framework, POLISwith a unified hardware-software representation, so as to prejudice neither hardware nor software implementation.

Polis Publications Chinook the tool is not available on-line Chinook is a hardware-software co-synthesis CAD tool poliz embedded systems. Polie, we are developing a methodology for specification, automatic synthesis, and validation of this sub-class of embedded systems that includes the examples described above. These controllers utilize Micro-processors, Micro-controllers and Digital Signal Processors but are neither used nor perceived as computers.

The Complete List of Publications of the Project. In addition, the graphical user interface is used to define target architectures and design constraints. They also put more effort on software synthesis and estimation than the other tools. Today, embedded systems are designed with an ad hoc approach that is heavily based on earlier experience with similar products and on manual design.

Partitioning, Software generation, Hardware generation.