• Title/Summary/Keyword: UART

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Educational Software Development of Bluetooth Protocol for Protocol Monitoring and Emulation (프로토콜 모니터링 및 에뮬레이션 기능을 제공하는 블루투스 프로토콜의 교육용 소프트웨어)

  • 정중수
    • The Journal of the Korea Contents Association
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    • v.4 no.1
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    • pp.1-7
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    • 2004
  • In addition to wired communication technology, wireless communication technology has been driving communication revolution nowadays. Bluetooth technology carries out data/voice communication making pico-net and the various application services are supported by access network connected to public network. This paper presents educational software development of bluetooth protocol stack including HCI, L2CAP, RFCOMM, SDP and profiles including GAP, SPP, GEOP, FTP. This software which supports programming environment of these protocol monitoring and emulation is implemented basically step by step for education based on H connected to the bluetooth device through RS-232-C, UART or USB cable. Application program coded by Visual C is operated over the firmware loaded on the bluetooth device connected to the PC. Additionally ftp and chatting function are developed to enhance educational efficiency.

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A study on the design of an accident prevention system using an acceleration sensor (가속도 센서를 이용한 사고방지 시스템 설계에 관한 연구)

  • Shin, Jin-Seob;Lee, Yun-Min
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.21 no.6
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    • pp.135-140
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    • 2021
  • In this paper is a study on system design to prevent accidents using accelerometers. A switching power FET was configured at the power supply stage, and DC-DC converter, a regulator, and an LDO were designed for the power supply. In order to solve the power problem at once, it was divided into two parts, and a 3-axis accelerometer was designed to extract motion information to safely prevent accidents. Microprocessor enables communication through I2C and UART communication ports, and enables debugging through J-LINK. As a result of measuring the acceleration sensor data, it was confirmed that the power is normally cut off to prevent accidents when motion at an angle of 30° or more is detected.

Wired/Wireless LED Lighting Communication Using Reconfigurable Peripheral Unit (재구성형 주변장치유닛을 사용한 유무선 LED 조명 통신)

  • Yoo, Sehoon;Gong, Jungchul;Kim, Kichul
    • Journal of IKEEE
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    • v.17 no.4
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    • pp.407-417
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    • 2013
  • In this paper, a reconfigurable peripheral unit for LED lighting communication is presented. Embedded lighting devices require various communication protocols. Usually, serial communication protocols and lighting control communication protocols such as DALI, DMX512, UART, SPI, IrDA, etc. are used in lighting devices. When the requirements of communication protocols are satisfied with separate IPs, the cost and the power consumption can considerably increase. We propose a reconfigurable communication peripheral unit which uses analysis of signal formats of the protocols. The gate count of the reconfigurable peripheral unit uses only 57% of the gate count of the separate implementation. Also, in this paper, a mapping table based DALI-ZigBee interfacing method for flexible lighting network configurations is proposed. Using this method, various DALI-ZigBee network systems can be easily set up. An LED lighting system platform is implemented to verify the operation of the DALI-ZigBee interfacing method. The reconfigurable peripheral unit and the DALI-ZigBee interfacing method can be efficiently used to implement various wired/wireless lighting communication systems.

Low Performance Electronics Evolved into Smart Appliances (스마트 가전으로 진화된 저사양 생활가전)

  • Back, Jonghui;Kim, Kyosun
    • Journal of the Institute of Electronics and Information Engineers
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    • v.50 no.9
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    • pp.107-115
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    • 2013
  • Smart appliances with multi-media and telecommunication equipments provide users complicated convenience functions. On the contrary, 8-bit controller-based low performance electronics still cannot afford such multimedia and telecommunication. If we find a way to have low-end electronics connected and provide complicated functions, they can be also made "smart". Fortunately, 8-bit controllers used in low-end appliances have UART, which can be connected to any of BlueTooth, Wi-Fi and ZigBee communication modules which can, in turn, communicate with smart devices. Any communication module can be attached to the low-end electronics due to the variety of smart devices' connectivity at the other side. Although the convenience functions seem complicated, they are actually macros in a script form composed of micro commands which implement the base functions of appliances. Since the kinds of the base functions are not that many, the low-end electronic appliances will become "smart" if their control program can be extended to execute sequentially the micro commands in any combination. Such simple innovation has not seen the world, until now due to the overhead of the additionally required hardware such as display devices and buttons. The high-quality display and touch screen functionalities of smart devices can replace the required hardware, and remove the overhead completely. In fact, the low-end appliances become smart as if an "evolution kit" is newly equipped.

A Bluetooth Protocol Analyzer including Simulation Function based on PC Environment (PC 환경에서 시뮬레이션 기능을 포함한 블루투스 프로토콜 분석장비)

  • 정중수
    • Journal of KIISE:Computing Practices and Letters
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    • v.9 no.1
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    • pp.95-99
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    • 2003
  • In addition to wired communication technology, wireless communication technology has had communication revolution nowadays. Bluethooth technology carries out data/voice communication within pico-net. Nowadays the various services are supported by access network connected to public network. This paper presents implementation of bluetooth protocol analyser which simulates bluetooth protocol. MS window98 and visual C are used for development environment and application program is operated over the firmware loaded on the bluetooth device connected to the PC through UART which of the maximum transmission rate is 115kbps because transmission rate less than 20kbps affects rarely the performance. The performance analysis on the propose system is carried out as simulating the signalling information for the voice test and the traffics between two bluetooth systems for file transfer. The throughput analysis for file transfer service and call processing capacity for voice service are considered as performance analysis parameters. File access time is very important parameter and throughput is 13 kbps in case breakpoint time to file access is 0.04sec. Also call processing time is about 16.6ms in case of communication with the headset. The performance analysis of simulation results satisfies with bluetooth device development.

PWM ASIC Development for AC Servo and Spindle motor control (AC Motor 제어용 PWM ASIC 설계 및 개발)

  • 최종률
    • Proceedings of the KIPE Conference
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    • 2000.07a
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    • pp.605-609
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    • 2000
  • This paper presents a development of the Pulse Width Modulation ASIC for control of the AC servo or spindle motor in machine tools. The ASIC is designed two PWM functions for simultaneous control of a converter and an inverter. Also the device includes additionally two UART functions for interfacing the RS232C with PC or other devices. The device is connected to the microprocessor of Intel or Motorola by bus interface. The required output voltage and frequency for the motor control is programmed to the PWM block and the corresponding switching signals are calculated and generated with regard to the programmed value.

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A Low Power smartRF Transceiver Hardware Design For 2.4 GHz Applications

  • Kim, Jung-Won;Choi, Ung-Se
    • Journal of IKEEE
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    • v.12 no.2
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    • pp.75-80
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    • 2008
  • There are many researches to reduce power consumption of battery-operated Transceiver for 2.4 GHz smartRF applications. However, components such as processor, memory and LCD based power managements reach the limit of reducing power consumption. To overcome the limit, this research proposes novel low-power Transceiver and transceiver Hardware Design. Experimental results in the real smartRF Transceiver show that the proposed methods can reduce power consumption additionally than component based power managements.

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Implementation of Lower-Power HDMI 1.3A CEC using MCU (MCU를 이용한 저전력 HDMI 1.3A CEC 모듈 구현)

  • Jeong, Kwang-Seob;Moon, Ho-Sun;Kim, Yong-Deak
    • Proceedings of the IEEK Conference
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    • 2008.06a
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    • pp.735-736
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    • 2008
  • Recently Multi media industry require HDMI-CEC which is the system to integrate various product one action. So you need to implement CEC when you use HDMI1.3a. In this paper, presented how to make CEC protocol in MCU and how to reduce power consumption. This system implement CEC protocol and uart communication as using WELTREND MCU.

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DESIGN AND IMPLEMENTATION OF TELEMETRY SYSTEM INTERFACE FOR KSLV-I

  • Kim Joonyun;Kim Bo-Gwan
    • Bulletin of the Korean Space Science Society
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    • 2004.10b
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    • pp.274-277
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    • 2004
  • KSLV (Korea Space Launch Vehicle)-I telemetry system will be composed of two telemetry streams: a lower stage telemetry stream and an upper stage telemetry stream. In this paper, the authors present design, implementation and test results of the upper stage telemetry interface for KSLV-I. The telemetry system currently is in the stage of the prototype model development, and its engineering model and flight model will be developed in the near future.

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The Design and Implementation of Wireless Audio Transceiver using Bluetooth (블루투스를 이용한 디지털 무선 오디오 송수신기 설계 및 구현)

  • 강명구;조명훈;김대진
    • Proceedings of the IEEK Conference
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    • 2003.11c
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    • pp.259-262
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    • 2003
  • In this paper, we designed and implemented digital wireless audio system with embedded RTOS using Bluetooth. Transmitter is consisted of a Settopbox, FIFO for interface block, Microprocessor(ARM7TDMI), UART driver and Bluetooth module. Receiver is consisted of a Microprocessor, AC-3 decoder, Bluetooth module and a Speaker with Amp. We programed Bluetooth protocal stack of HCI, L2CAP, and RFCOMM, so that Bluetooth module interacts with CPU.

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