• Proceedings of the KIEE Conference
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• 2008.04a
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• pp.143-144
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• 2008

본 논문에서는 차량용 실시간 운영체제인 OSEK/VDX가 어떠한 구조로 이루어졌는지 알아보고 간단한 Application에 응용해 보았다. OSEK/VDX의 표준화 되어있는 기본 구성요소인 OS, COM, NM, OIL에 대하여 각각의 기능에 대하여 소개하고 OIL파일을 작성해서 ECU에 적용하기 위한 설계 가이드를 제시한다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.24 no.6
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• pp.818-825
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• 2020

The embedded system can be defined as a special purpose system with a built-in computer, and has a wide variety of applications such as home appliances, office equipment, and weapon systems. A well-defined taxonomy in a specific field is advantageous for learning and education, however, the classification scheme for embedded systems is difficult to find. In this paper, we propose a taxonomy for embedded systems. First, the generalized structure of the embedded system was presented. And, it is divided into two parts: "firmware based" and "embedded OS based". In addition, according to the characteristics of embedded system applications, it is divided into two categories: "non-dependable" application and "dependable" application, which makes 4 planes. We describe the features of each quadrant and show that the classification is well suited by showing examples. Our taxonomy can be used to set teaching and learning methods of embedded systems.

• IEMEK Journal of Embedded Systems and Applications
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• v.6 no.1
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• pp.32-40
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• 2011

For a NAND booting based embedded system, an application program on the NAND flash memory is downloaded to the RAM when the system is booted. In this case, the application program exists in both the RAM and the NAND flash so the RAM usage is increased. In this paper, we suggested the demand paging technique for the decreasing of the RAM usage for OS-less NAND booting based embedded systems. As a result of a benchmark test, 40~80% of the code memory usage was reduced with below 5% of execution time delay.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.10
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• pp.4574-4577
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• 2011

In this paper, In this paper, analyzed structure of home networking used in USN(Ubiquitous Sensor Network) and embedded systems for home automation was implemented on the Android operating system. Developed a system for building a home network using wireless communication, so it is possible to minimize the difficulty of installation. Home automation system has built based on pre-defined ID according electronic components that make a house. In addition, a data structure suitable for home automation was defined and developing application programs based on Android OS according to packet structure, embedded system for home automation was developed.

• Journal of the Korea Society of Computer and Information
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• v.13 no.3
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• pp.45-55
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• 2008

Due to the increasing complexity of embedded system design, automatic code generation of embedded software and hardware-software co-design methodologies are gaining great interest from industries and academia. Such an automatic design methodologies are always demanding a formal system specification languages for defining designer's idea clearly and precisely. In this paper, we propose automatic embedded C code generation from SDL (Specification and Description Language, ITU-T recommended the SDL as a standard system description language) with considering a real-time uC/OS-II operating system. Our automatic embedded C code generator is expected to provide a fast specification, verification and performance evaluation platform for embedded software designs.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.16 no.2
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• pp.273-278
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• 2012

In this contribution, we design and implement an SPI hardware interface for the microprocessor to communicate with the MMC (Multi-Media Card) in an embedded system. Proposed architecture is compatible with the APB in AMBA bus architecture. Embedding OS in an embedded system means a big burden in terms of hardware and software ending up with performance decline. In this paper, we adopt the concept of SPI communication without using OS in the embedded system and implement in a form of FPGA chip. The designed SPI module was automatically synthesized, placed, and routed. Implementation was performed through the Altera FPGA and well operated at 25MHz clock frequency, which satisfied our target speed.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.45 no.3
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• pp.36-43
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• 2008

The OS has the manager of the overall system operation, and has the exact information of the running system. Power management by the OS may have great impact for the optimization of the power consumption. We implement E-ACPI, an extended ACPI which is designed for an advanced power management of embedded systems. In this paper, we address (i) how we extend the exiting ACPI to E-ACPI, (ii) technical challenges to overcome in implementation, and (iii) flow we port our E-ACPI to an embedded linux system in this paper. Experimental results show that our E-ACPI is very useful and effective in practice.

• 제어로봇시스템학회:학술대회논문집
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• 2004.08a
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• pp.413-416
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• 2004

The tracking antenna system must be always pointed to a satellite for data link among moving vehicles. Especially, for an antenna mounted on a moving vehicle, it needs the stabilized the antenna system. So, software and hardware, signal processing of motion detection sensors, real-time processing of vehicle dynamics, trajectory estimation of satellite, antenna servo mechanism, and tracking algorithm, are unified in the antenna system. The purpose of this paper is to design the embedded tracking antenna control system for satellite communication. The embedded OS(Operating System) based stabilization and tracking algorithm was implemented. The performance of the designed embedded control system was verified by the real satellite communication test.

• IEMEK Journal of Embedded Systems and Applications
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• v.4 no.4
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• pp.174-179
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• 2009

Due to digital convergence, mobile embedded systems need more functionalities and a fully fledged OS. Applications for such embedded systems are linked with many shared libraries available in the OS and access a large data set at launch time. This results in increased application launch time. In this paper, we propose two techniques for reducing the application launch time: lazy-loading and pinning. Lazy-loading defers loading shared libraries that are not used in the application at launch time, whereas pinning guarantees the residence of shared libraries and data used at launch time in the main memory.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.13 no.7
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• pp.1335-1343
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• 2009

This paper focuses on the implementation of hand held typeARM11 Platform for gas sensor based on Embedded Linux OS. The S3C6400, which is ARM11 architecture based, is the key component of the ARM11 Platform, Bluetooth is adapted to consist the network for the wireless transmission of environmental data between a sensor node and hand held type ARM11 Platform. Linux is ported to the Platform, QT/embedded is used for the application development.