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microkernel Development for Embedded Systems

Journal of Software Engineering and Applications 2013年第1期6卷 20-28页

作者： Rodrigo Maximiano Antunes de Almeida Luis Henrique de Carvalho Ferreira Carlos Henrique Valério IESTI-Systems Engineering and Information Technology Institute UNIFEI-Federal University of Itajubá Itajubá Brazil.

This paper presents the development of a microkernel with a device driver controller for embedded systems. The implementation was done in C language aiming low cost microcontrollers. The proposed system allowed to perform soft real-time activities while keeping the drivers and the application isolated by a secure layer. The callback system proved itself extremely simple to use while still maintaining the security of the system regarding the temporal constraints.

关键词： Embedded Systems microkernel Device Driver Controller Hardware Devices Callback

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microkernel and Middle-Ware Based GIS Platform Design

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Positioning 2014年第2期5卷 53-58页

作者： Tingyan Xing Shang Zhang Fan Zhang Faculty of Information Engineering China University of Geosciences Beijing China Faculty of Information Engineering China University of Geosciences Beijing China College of Computer and Information Technology China Three Gorges Yichang China Zondy Cyber Group Co. Ltd. Optical Valley Software Park Wuhan China

By contrasting the traditional way in which GIS was completed that comes with less flexible, low efficiency, and lack redundancy which cause high entry cost, the fast development of microkernel plug-in technology provides the lightweight, efficient and scalable solution to Geographical Information System (GIS). This paper is to reveal the potential of microkernel plug-in geospatial information processing technology in GIS design and practice, with the acceptance and usage of function model called Resource loading manager(RLM) for GIS applications, which provides a possible solution to overcome the GIS’s high cost issue. After the short review of microkernel plug-in technology, the possibility of GIS design with microkernel is analyzed. This paper also introduced the composition of the whole system and the design of GIS service platform based on middle-ware in detail.

关键词： microkernel LBS Middle RLM

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RSSI Enhanced microkernel-Based LBS Design

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Journal of Geographic Information System 2014年第2期6卷 109-114页

作者： Tingyan Xing Shang Zhang Fan Zhang Faculty of Information Engineering China University of Geosciences Beijing China Zondy Cyber Group Co. Ltd. Wuhan China

Geographical Information System (GIS) always plays an integral role in LBS systems. But it comes with technology problems, such as less flexible, low efficiency, no redundancy of existing geographic information of application configuration which has high entry cost. At same time, indoors positioning is attracting more and more attention from research domain where GPS-like systems do not work. By RSSI location fingerprint data that sampling from the actual WSN environment, this article analyzed RF signal propagation characteristics in indoor from the point of view of the indoor positioning, and analyzed some factors that may affect the positioning error, which provided a theoretical basis for the positioning algorithm design and positioning system deployment. The aim of this paper is also to present a lightweight, efficient and scalable microkernel plug-in geospatial information application system and its implementation method for GIS in LBS design and practice. In this paper a software model called Resource loading manager (RLM) is designed. Through the RLM efficient allocation of geographic information resources and security management could be achieved.

关键词： RLM microkernel LBS GIS

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IPC Mechanisms in Satellite Real-Time microkernel Operating System

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Journal of Harbin Institute of Technology(New Series) 1998年第4期5卷 72-75页

作者：刘晓冬李莲治郭福顺朱力群

One of the most important features of modem minor satellites is to realize autonomous moving. The perfomance of the satellite autonomous computer operating system acting as the control center is of utrnost importance. The recent trend in operating system development is adopting microkernel architecture that holds such advantages as microminiaturization, modularity, portability and extendibility. IPC is the key of microkernel design. Message-based IPC mechanism is generally used in existing microkernel Operating system. It is of consistency, safety and ***, it can not provide efficient support for real-time applications in satellite systems and it only applies to loose coupling multi-processor architecture. In this paper, an improvement solution for existing message-based IPC is proposed at first to obtain real-time performance. Then a new IPC mechanism is designed. It particulary applies to shared memory tight coupling multi-processor architecture.

关键词： Satellite microkernel real-time IPC mechanism message

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A Distributed Process Management Model for Better Scalability on Multicore Platform

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Chinese Journal of Electronics 2017年第2期26卷 263-270页

作者： CHENG Zhonghan ZHU Runshen CHEN Peng HUANG Hao State Key Laboratory for Novel Software Technology Nanjing University

With the widespread utilization of multicore processors,operating systems face new challenges on *** lock mechanism used by current monolithic OSs makes some critical modules encounter performance bottlenecks caused by lock *** contention in Linux process lifecycle management results in process Creation,execution and termination(CET) scaling poorly with core count *** from the centralized fashion of Linux,this paper presents a Distributed process management model(DPMM) on microkernel for better *** kernel functions are distributed into message passing servers running on different *** splits the shared data including Process control blocks(PCBs),page pools and buffer caches into these cooperating *** actions including PCB creation/deletion,page allocation/freeing,executable loading and scheduling can be parallelized without *** micro-benchmarks show that DPMM achieves nearly linear performance growth on process CET and outperforms Linux and Minix3 on a 32-Core machine.

关键词： Multicore microkernel Scalability Process management

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ES体系结构的研究及其应用

ES体系结构的研究及其应用

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作者：周全扬州大学

学位级别：硕士

本文论述了使用RTOS进行嵌入式系统开发的原理和方法，着重讨论嵌入式系统(ES-Embedded System)的体系结构和建构原理及其应用。嵌入式系统的概念很容易理解，但是高端的嵌入式系统开发很困难。构建一个嵌入式系统，技术门槛高，是一个... 详细信息

本文论述了使用RTOS进行嵌入式系统开发的原理和方法，着重讨论嵌入式系统(ES-Embedded System)的体系结构和建构原理及其应用。嵌入式系统的概念很容易理解，但是高端的嵌入式系统开发很困难。构建一个嵌入式系统，技术门槛高，是一个复杂的系统建构过程。嵌入式系统开发过程有软件和硬件两部分开发工作。硬件开发主要涉及微处理器／微控制器、存储器和常见外围接口(A／D、D／A、时钟、USB、网络接口等等)部分的设计。硬件设计包括原理图、PCB版图设计和硬件安装调试。硬件设计的最终成果是具有特定功能的板级电路和系统结构件。软件设计是嵌入式系统中的主要部分。硬件提供了潜在的计算能力，要发挥硬件功能，需要软件的支持。例如，同样的一台PC机硬件，可以安装Win3.1、Win95或者WinXP。在硬件没有任何改动的情况下，用不同的操作系统软件，系统的功能、稳定性和用户操作的感觉会有很大差别。本文首先概述嵌入式系统的组成原理，然后对嵌入式系统设计中涉及到的硬件和软件技术作概括性介绍。论文的重点是嵌入式操作系统(EOS)，特别是实时操作系统(RTOS)的理论研究，主要对如何应用RTOS开发嵌入式系统的问题进行深入的探讨。通过对μC／OS-Ⅱ、Windows、Window CE、FreeBSD、Minix、Linux、Lineo、Windriver、QNX、Mach、OSE、L4、“和欣”……等大量操作系统的比较研究，本文总结出当前操作系统的发展方向和如何构建属于自己的操作系统的基本方法。这些基本方法对于构建中国自己知识版权的实时操作系统具有重要的价值和一定的指导意义。在研究过程中以μC／OS-Ⅱ v2.51 RTOS为代表，将该实时操作系统移植到ARM7处理器上，并利用ADS和Multi-ICE在Evaluator-7T评估板上调试扬州大学硕士学位论文成功。另外利用EasyPack仿真器将抖C/OS一n ***移植到8051微控制器上，并调试成功。充分验证了对实时操作系统结构的正确理解。本文将通过对移植代码的说明，详细论述操作系统的移植原理。论文共分7章9部分。引言部分简要介绍嵌入式系统的重要性和研究嵌入式系统的必要性和迫切性。第一章绪论，介绍嵌入式系统的概念和构建嵌入式系统的关键技术。第二章论述嵌入式系统硬件，详细论述构成嵌入式系统的处理器、存储器、外围设备和网络等硬件要素。第三章嵌入式系统的软件，按照系统软件(固件、操作系统)和应用软件，论述了嵌入式系统中的软件技术。第四章介绍嵌入式系统开发工具，介绍了嵌入式系统开发过程中常用的软件和硬件工具。第五章和第六章分别以拼005一n在8051和ARM上的移植为例子，说明基于简单操作系统内核和复杂操作系统平台的嵌入式系统开发。第七章介绍基于Linux的嵌入式系统的构建方法。最后是全文的总结，这部分从课题的需求性、实用性和先进性3个方面，对论文进行总结。

关键词：嵌入式系统 RTOS μC/OS-II Linux microkernel

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