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A new Communication protocol design in the Data Link Layer of the industry Ethernet ring network is presented in this paper. The HDL files used in the design are packaged into IP Core. The simulation shows that the MAC protocol design for the Industry Ethernet Ring Network can send and receive not only the special frames of the Industry Ethernet ring network but the frames of the traditional Ethernet...
Models can liberate engineers from system complexity, which brings an efficient way for developing large-scale, complex and reliable real-time system. A key technology is decomposition and composition of models. Complicated problems can be decomposed into simple issues through decomposition of models. Composition of models must deal with complex relationships between every parts of the system, so...
In this paper, a formal framework for component-based embedded systems is presented. Resorting to such a framework, the soundness, congruence and completeness of system structures and behaviors can be derived. The framework involves various MoCs reflecting interacting rules and operational semantics for system behaviors and a formal language specifying definitions, axioms, transition rules or equations/inequations...
An embedded image acquisition system is designed and implemented to realize image acquisition, data saving and communication. The system is powered by a C8051F microprocessor, which is also equipped with a OV7620 digital video camera chip, a IDT124SA CMOS Static RAM, a MAX485 lower power transceiver interface. The system is not only small in size, but also has high real-time performance. Because the...
A component-based model integration approach for the embedded computer control system (ECS) development is proposed in this paper. The three-layer architecture for modeling, verification as well as implementation is described. Model strategies such as multi-aspect & multi-view description method, DSML (domain specific modeling language) & FML(formal modeling language) description method as...
Current development method for embedded control system is mainly based on manual programming, so it is very time-consuming and is difficult to guarantee system performance. The paper presents a modeling language for embedded control system development, called ECSML, and a corresponding automatic code generation framework. ECSML satisfies the modeling requirements, including functionality and real-time...
Current development method for computerized numerical control ( CNC ) system is mainly based on manual programming, so it is very time-consuming and is difficult to guarantee system performance. This paper presents a model-based development architecture, which is based on meat-model and model transformation, to address the problem. A domain-specific meta-model has been created to establish a special...
This paper presents an open-architecture Computerized Numerical Control (CNC) system based on Windows CE, which is a multi-task embedded real-time operating system. The CNC system adopts a master-slave architecture, And the Master applies with Windows CE, which charges weak real-time tasks such as NC code's editor, interpreter and simulator function block, fault diagnosis, I/O monitoring and control...
The paper presents control and scheduling co-design of the multitask schedulability for embedded control system by designing and simulating the hydraulic embedded control system (HECS),which is always neglected during the design and may result in unpredictable behaviors. Based on analyzing the function and performance requirements of the HECS, the effect of real-time system choice and control task...
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