Embedded Linux Operating System Research Articles

Design and Realization of a New Intelligent Capacitive Load Switch

Based on the requirement of reactive power compensation of the intelligent power grid, a new type of capacitor switch design is presented. Starting from the characteristics of switching devices, research on the working timing between impulse switch and thermistor, build the controller hardware system based on ARM core, implement of power system parameters’ collection, capacitor switching control and human-computer interaction, etc. The embedded LINUX operating system is proposed for a better solution to multi-task, real-time and upgrade requirements in power intelligent control. At the same time, switching algorithm based on fuzzy control theory is adopted to improve the reliability of this switch.

Embedded Linux 기반 무인비행로봇의 저가 고정밀 위치 모니터링 시스템 구현 연구

Abstract: Recently, UFRs (Unmanned Flying Robots) have begun to be utilized in various areas for civilian and military applications. Due to this increased utilization, accidents involving UFRsare also increasing. To prevent or monitor accidents caused by UFRs, high-accuracy positioning information is one of the most important technical elements. This paper proposes an efficient UFR monitoring system which provides accurate UFR positioning information with low-cost onboard elements; a small ARM module based on an embedded Linux operating system, a low-cost single frequency GPS receiver with a cheap patch antenna, and a versatile wireless network interface module. The ground monitoring system employs a dual frequency GPS receiver to generate exact UFR coordinates with cm-level accuracy. By processing the UFR measurements based on the Inverse RTK (Real Time Kinematic) method, the ground monitoring system determines the cm-level accurate coordinates of the UFR. The feasibility of the proposed UFR monitoring system was evaluated by three experiments in terms of data loss and accuracy.Keywords: URF, embedded linux, GPS, inverse RTK, monitoring system

Design Practical System Based on Packet Tracer Technology

This paper combines with the actual background of the university experiment teaching of computer network, analyzes the construction situation and the existing problems of networking practical training system. Then it designs and implements the network practical training system based on embedded platform. The system mainly consists of three parts: the experiment control system, embedded experiment box and training courses. PC Terminal as the client of experimental control system is developed based on .NET/C#, which supports user login via online or offline mode, updating training courses intelligently and etc. Based on ARMS embedded microprocessor and embedded Linux operating system, it designs and implements the embedded experiment box ServerBox, which interacts with user by matrix keyboard and QT interface, analyzes network protocols based on Netfilter framework in Linux kernel, and extends ARP packet processing driver in Linux kernel to implement the visual analysis and intervention for ARP protocol. The PC Terminal has a connection with ServerBox by serial port, and communicates with each other by user-defined protocol. The system has passed the project acceptance inspection, and the first edition has been used in many colleges and universities. Its effect in improving students' knowledge and practice skills for the principle of network has been gaining recognition.

The Design of Information Collection System on the Internet of Things Based on MCU

In order to achieve the information collection function of the IOT, this paper is based on Embedded-ARM system, develops a terminal node hardware platform that uses S3C2440 as the core, and the hardware platform contains power supply module, processing and storage module, display and operation module, wireless communication module etc. Software platform uses Embedded Linux operating system, we transplant and produce boot loader, device drivers, the root file system, etc. On the platform of embedded system, we add MCU module, MCU module, Barcode scanning module, temperature and humidity module as the main information collection module, to realize the basic function of information collection of the IOT.

Design and Implementation of Data Acquisition System Based on Linux Platform

This paper introduces the hardware structure and software design of data acquisition system based on embedded Linux. In order to improve the real-time response performance and the ability of multi task for system, using ARM9 microprocessor technology in hardware, and transplant the Linux operating system, and the system reliability and scalability can be improved. The design makes full use of the characteristics of embedded Linux. The system software module have data acquisition module, data processing module, data communication module and data diagnostic module. The embedded Linux operating system is transplant into data acquisition system, that can accelerate the development of the system and convenient to future expansion functions, improve the observation data timeliness and accuracy, and can realize automation observation.

Remote Data Recorder Design Based on Embedded Linux

Radar, aerospace and wireless communications have a lot of demand for high-speed data acquisition and storage, in these applications, there is a need to control data collection and storage remotely, so researching safe, reliable, real-time remote data recorder is very meaningful. Based on Compact PCI IPC, putting ADC and data acquisition front-end into the chassis, using a dedicated PCI bus interface chip, to transmit data via Compact PCI backplane and record data to high-speed disk array. The platform use embedded Linux operating system to control high-speed and data acquisition. Users can manage data remotely by developing the data acquisition card driver and application software.

Based Embedded System Applications in Intelligent Home Remote Monitoring

With the continuous improvement of security awareness, home security has become the focus of attention. The actual demand for home video surveillance system, designed a cheap, practical, small size and low power consumption of video surveillance systems, this paper uses microprocessor S3C2440 ARM9 core as the core hardware control, embedded Linux operating system with software the control core, and cheap, generic USB camera video capture device as a front end to complete the design of a home video surveillance system.

Vehicle Display and Control Terminal Design Based on the MPC5121e and Embedded Linux

The design program of Vehicle Display and Control Terminal was introduced, it was based on the Embedded Linux which developed on the MPC5121e hardware platform. Through kernel cutting and transplanting of the Embedded Linux operating system, and transplanting the new generation of the Altia Designer to the MPC5121e hardware platform, the graphical user interface software of Vehicle Display and Control Terminal was developed successfully.

Design of Vehicle Location and Communication System Based on BeiDou Navigation Satellite System (BDS)

In order to realize the fusion of secure real-time location of vehicles and reliable communication with the outside world, a vehicle location and communication system was designed based on BeiDou Navigation Satellite System. The embedded Linux operating system platform was proposed with ARM processor S5PV210 as the core. On the basis of open source graphical user interface library QT, BDS was utilized to realize vehicle positioning and short message, GSM for car phone and SMS. The experiments show that the functions are achieved, such as vehicle positioning, car phone, short message and so on.

An open and configurable embedded system for EMG pattern recognition implementation for artificial arms.

Pattern recognition (PR) based on electromyographic (EMG) signals has been developed for multifunctional artificial arms for decades. However, assessment of EMG PR control for daily prosthesis use is still limited. One of the major barriers is the lack of a portable and configurable embedded system to implement the EMG PR control. This paper aimed to design an open and configurable embedded system for EMG PR implementation so that researchers can easily modify and optimize the control algorithms upon our designed platform and test the EMG PR control outside of the lab environments. The open platform was built on an open source embedded Linux Operating System running a high-performance Gumstix board. Both the hardware and software system framework were openly designed. The system was highly flexible in terms of number of inputs/outputs and calibration interfaces used. Such flexibility enabled easy integration of our embedded system with different types of commercialized or prototypic artificial arms. Thus far, our system was portable for take-home use. Additionally, compared with previously reported embedded systems for EMG PR implementation, our system demonstrated improved processing efficiency and high system precision. Our long-term goals are (1) to develop a wearable and practical EMG PR-based control for multifunctional artificial arms, and (2) to quantify the benefits of EMG PR-based control over conventional myoelectric prosthesis control in a home setting.

IMPLEMENTATION OF LINUX BASED UART DEVICE DRIVER

This paper deals with design, implementation and testing of device driver for a DUART TL16C2550 peripheral on a MDROADM board. The MDROADM board is used in optical networks for switching the optical signals between the nodes. The MDROADM board is designed with a MPC8308 PowerQUICC II Pro Processor as the main processor and the TL16C2550 peripheral is used for extending the serial interface on the board. The MDROADM board runs an embedded Linux operating system. The device driver for the DUART TL16C2550 is designed based on the customized interfacing with the MPC8308 PowerQUICC II Pro Processor. The device driver is in compliance with Linux kernel V2.6.29.6

Design and Implementation of Public Bike Smart Lease System

This paper presents an intelligent urban public bike leasing system based on ARM. This system takes S5PV210 microprocessor as the core of the terminal system and constitutes the public bike rental point with Intelligent parking device connected to the CAN bus. This system based on Android, Embedded Linux operating system CAN bus and GPRS remote data transmission technology designs the hardware and the software of the terminal and designs the software of the data center using I/O multiplexing. The system guarantees the efficient operation of public bike rental, and provides more intelligent and personalized service to users.

The Design of Embedded Video Monitoring System Based on DSP Processor

This paper designs a embedded video monitoring system based on ARM processor Ep9315 and TMS320DM642, and using embedded Linux operating system. In the system, video capturing module uses the video decoder TW2814. In order to capture better data, the control of TW2814 is needed. Through the imitation of I2C bus, the driver provide the application with the function of the setting of capturing parameters such as hue, color saturation, contrast and brightness, and the check of video losing.

Design and Applications of Embedded System in Video Surveillance

In this paper, we select the ARM11 S3C6410 processor and embedded Linux system using the system needs to build a development environment. Studied in the embedded Linux operating system USB video capture device driver modules, collecting network video surveillance system implemented by V4L2 driver framework. Video capture program primarily through ioctl system function calls to access V4L2 driver framework. Completion of real-time video transmission via RTP / RTCP protocol. In addition, the Web server development platform porting.

An open source software approach to geospatial sensor network standardization for urban runoff

In this paper, we implement a geospatial sensor network for monitoring a green technology stormwater runoff site. The sensor network uses OpenWRT, an embedded Linux operating system, and other open source software, to create a modified router for reading Maxim’s 1-Wire™ protocol, queuing and transferring standardized sensor data while enabling location and time. The modified router created the bridge between the sensor protocols and the middle-level software to provide reliable data to both the sewer district and the Environmental Protection Agency. Representational State Transfer (REST) is used in the design philosophy of the client and server open source software for transferring the data from the embedded systems to the server level for storage and publication. The use of open source software not only creates a more affordable network but lowers the entry barrier to sensor networking and enables developers for continued innovation and standardization.

Research of a New Power Quality Detection System Based on ARM

Based on the comparative analysis of the fast Fourier transform (FFT), the short-time Fourier transform (STFT), the wavelet transform (WT) and other power quality detection algorithms, this paper puts forward to a new power quality detection algorithm which combines the Fourier transform with the wavelet transform. The transient as well as the steady state signals are separated on the basis that the wavelet transform is sensitive to the singular signals. The presented algorithm detects a variety of harmonic parameters of the gird after the separation of steady state signals is finished by fast Fourier transform. A new power quality detection system is then designed based on the core chip of S3C2440A, and the algorithm which is ARM-9 based is transplanted into the embedded Linux operating system to carry out the experiments. Analysis of the experimental data shows the detection algorithm is reliable by Fourier transform and wavelet transform.

GPRS Based GPS Mobile Terminal Communication Study

wireless communication characteristics of the GPRS technology, and in combination with GPS global positioning technology and geographic information system technology, the embedded Linux operating system as a platform, a mobile terminal navigation and design functions of the system monitor. The mobile terminal navigation and monitoring system in the practical application, through the GPS mobile terminal to the corresponding GPS positioning information receiving case, sending the received by the wireless communication technology of GPRS network GPS positioning information to the monitoring center corresponding, in order to achieve the mobile terminal system of navigation and monitoring role. The article will be in for the mobile terminal communication system design scheme based on the GPRS technology based on GPS, the communication of this system used for navigation and monitoring purposes are analyzed and discussed.

The Design of CAN Bus Communication System Based on MCP2515 and S3C2440

CAN bus was widely used in embedded system development, but most embedded processors without CAN bus controller, need to extend external CAN bus interface through external bus. In order to send and receive the CAN bus data by S3C2440 chip, interface function of S3C2440 was extended by MCP2515 chip in the paper, which was used the SPI interface to extend CAN bus interface. The design of CAN bus hardware interface was described in the paper. The design of CAN device drive program on the embedded Linux operating system was specified in detail.

DyPS

In addition to General Purpose Processors (GPP), Multi-core SoCs equipping modern mobile devices contain specialized Digital Signal Processor designed with the aim to provide better performance and low energy consumption properties. However, the experimental measurements we have achieved revealed that system overhead, in case of DSP video decoding, causes drastic performances drop and energy efficiency as compared to the GPP decoding. This paper describes DyPS, a new approach for energy-aware processor switching (GPP or DSP) according to the video quality. We show the pertinence of our solution in the context of adaptive video decoding and describe an implementation on an embedded Linux operating system with the help of the GStreamer framework. A simple case study showed that DyPS achieves 30% energy saving while sustaining the decoding performance.

Design of WSN Nodes Drivers Based on Embedded Linux

WSN node is a key equipment to build wireless sensor networks.In this paper the network node framework of the wireless sensor based on the CC1101 is introduced. The hardware interface and characteristics of CC1101 are analysed.The process of achieving its driver in the embedded Linux operating system is addressed in detail, which includes chip initialization, interrupt processing, and interface with the upper layer protocols and so on.