• The Journal of Korean Institute of Communications and Information Sciences
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• v.37C no.11
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• pp.1020-1026
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• 2012

In this paper, we proposed a RTOS-based lighting control system to improve energy efficiency. This proposed system, real time process was designed to the specified division of the LED streetlight control module for the RTOS-based lighting control into three different tasks. The first task transmits LED lighting signal by measuring illuminance, and the second task transmits motion detecting signal using motion detector. In the third task, lighting control to LED was designed through passed control signal from other tasks The execution status was examined ports that are directly to the ATmega128 MCU for the verification of the system, and illuminance distribution and operating conditions were verified through LED street field test. The proposed RTOS-based lighting control system has brought improving system performance and also facilitate an addition of other functions, and it was possible to optimize energy saving by intelligent lighting pattern control.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.9 no.3
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• pp.217-224
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• 2009

The traditional small educational multi-joint robots were developed on firmware. In these system's case, we cann't give a chance to educate good practices due on executing just robot's simple movements. But it may be possible for RTOS to control the elaborate movement of the robot with assembling each part on firmware. With this RTOS, we can enhance the efficiency of robot's movements, but too difficult to use the education as increasing the complexity of robot system. To solve the problem, we apply with Design pattern and Refactoring for the Education. Applying robot's design with Design pattern and Refactoring. There may be easily understand what and how to design RTOS for any level ones. We may easily change/upgrade RTOS for new system with this approach. This paper mentions to design RTOS with Design patterns and to apply RTOS's source code with Refactoring.

• Digital Contents
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• no.11 s.78
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• pp.56-60
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• 1999

시장조사기관인 IDC는 2002년께 웹폰이나 디지털TV, 셋탑박스, 디지털 비디오 같은 임베디드 시스템이 PC시장을 앞설 것으로 내다보고있다. 이에 따라 이 시장을 둘러싼 업체들의 경쟁이 치열하게 펼쳐지고 있는데 이러한 임베디드 시스템에 필연적으로 사용되다시피하는 것이 바로 실시간 운영체제(RTOS:Real-Time Operating System)이다. 실시간 운영체계가 가지는 특징, 응용분야, 그리고 인터넷 상에서 실시간 운영체계의 정보를 얻을수 있는 방법에 대해 간략하게 소개하고자 한다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.22 no.3
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• pp.499-505
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• 2018

Shipping and logistics safety, security system is strengthening worldwide, the development of shipping and logistics safety security core technology for national security logistics system construction has been carried out. In addition, it is necessary to localize the Array Detection System, which is a core component of the container search machine, to cope with the 100% pre-inspection of the container scheduled for 2018 in the United States. In this research, we propose a test software program developed by using TI-RTOS (Texas Instruments - Real Time Operating System) with a test digital signal processing board which is developed self development. We have developed a program that can test GPIO, SRAM, TCP/IP, and SDcard using M4 MCU. Also we propose a study on a self-developed Digital Signal Processing Board among the array detection systems that replace foreign products. We have developed a test board that can test M4 MCU and developed an X-Ray Detector Digital Signal Processing Board that combines MCU and FPGA.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.56 no.12
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• pp.2247-2250
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• 2007

This paper presents an automated API translator for embedded software development based on a model-driven approach. Since MDA(Model Driven Architecture) provides little support for the development of embedded software, we propose a new approach containing its advantages. First, we define #generic APIs# which do not depend on any RTOS#s but provide most of typical RTOS services. We can describe RTOS-related behaviors of target application using these generic APIs in a CIC(Common Intermediate Code). Then, we propose a transformation tool for translating between a CIC using generic APIs and a C-code for specific RTOS. The proposed API translator converts them using XML transformation rule which is defined outside. It indicates that an API translator extends to other RTOS#s by modifying or adding the transformation rule. From the experiment. we validate the proposed method.

• The Transactions of the Korean Institute of Electrical Engineers P
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• v.57 no.2
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• pp.109-114
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• 2008

In this paper, a dynamic learning controller for robot manipulator is implemented using real-time operating system with capabilities of multitasking, intertask communication and synchronization, event-driven, priority-driven scheduling, real-time clock control, etc. The controller hardware system with VME bus and related devices is developed and applied to implement a dynamic learning control scheme for robot manipulator. Real-time performance of the proposed dynamic learning controller is tested and evaluated for tracking of the desired trajectory and compared with the conventional servo controller.

• Journal of the Korean Society for Precision Engineering
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• v.22 no.3 s.168
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• pp.38-45
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• 2005

In this paper, a bird type biped robot for entertainment controlled by R/C servo motors, is built using the embedded RTOS (Real Time Operating System). ${\mu}C/OS-II$ V2.00 is used fur RTOS and the board 80C196KC for main CPU. A control algorithm of R/C servo motors is proposed on ${\mu}C/OS-II's$ preemptive and deterministic property without any extra PWM module. The realized biped robot has 19DOF, that is, 12DOF for both legs, 6DOF for both arms and 1DOF for neck. To verify the proper walking process, ZMP(Zero Moment Point) theory is applied and the simulation has been done by ADAMS.

• Proceedings of the Korean Information Science Society Conference
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• 2003.10a
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• pp.292-294
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• 2003

최근들어 IT 산업이 급속도로 발전하면서, 리소스가 제한된 작은 기기들의 사용이 비약적으로 증가하는 추세에 있다. 이들 기기들에 플랫폼 독립성(Platform Independency), 보안성(Security), 이동성(Mobility) 등의 장점을 포함하고 있는 자바 환경을 적용하기 위해 연구가 계속되고 있다. 임베디드 시스템이나 모바일 시스템과 같이 자원이 제한적인 다양한 기기들에는 자바 가상 머신을 경량화한 최소 크기의 자바 플랫폼에 대한 Configuration인 CLDC(Connected, Limited Device Configuration)에서 정의하고 있는 K 가상 머신(K Virtual Machine: KVM)을 탑재한다. 본 논문에서는 실시간 운영체제로 iRTOS$^{TM}$을 사용하는 기기에서 KVM을 탑재할 때 필요한 메모리 체계를 설계하고 구현한 내용을 설명한다.

• Proceedings of the Korea Contents Association Conference
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• 2010.05a
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• pp.371-374
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• 2010

실시간 운영 체제는 운영체제로서 논리적 정확성이 중요하지만 시간적 정확성 또한 중요한 운영체제이다. 그렇기 때문에 시스템에서 발생하는 사건들을 처리할 때의 지연시간은 낮아야 한다. 특히 인터럽트 서비스 루틴에서는 현재 인터럽트 레벨보다 낮은 인터럽트는 마스킹되기 때문에 모든 인터럽트들이 원활히 동작하기 위해서 인터럽트 서비스 루틴은 보다 짧은 시간 동안만 CPU를 점유해야 한다. 처리시간이 긴 인터럽트 서비스 루틴의 지연시간을 줄이기 위해 윈도우 운영체제에서는 DPC(Deferred Procedure Call)를 이용하고 있다. 본 논문에서는 실시간 운영체제 iRTOS상에서 HISR을 이용하여 DPC를 설계 및 구현 하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2004.04a
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• pp.805-807
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• 2004

최근 IT 산업의 발전과 더불어, 리소스가 제한된 소형 기기들의 사용이 비약적으로 증가하고 있는 추세이다. 자바는 플랫폼 독립성(Platform Independency), 보안성(Security), 네트워크 이동성(Network Mobility) 등의 장점을 가지고 있어, 이러한 소형 기기들에 자바 환경을 적용하게 되면 여러 가지 이점을 가지게 된다. 임베디드 장치나 모바일 같은 제한된 리소스를 사용하는 기기들에는 SUN 사의 CLDC(Connected, Limited Device Configuration)에서 정의하고 있는 K 가상 머신(K Virtual Machine: KVM)을 탑재하여 사용하게 된다. 본 논문에서는 실시간 운영체제 iRTOS$^{TM}$와 KVM 을 탑재한 소형 기기에서 좀더 효율적으로 KVM 의 메모리를 관리하기 위한 Garbage Collection기법을 설계하고 구현한 내용을 설명한다.