嵌入式系统源码调试器GDB的远程通信

嵌入式软件调试环境GDB为嵌入式软件的开发提供了一个友好的软件调试平台。本文介绍了GDB的基本结构、其作为调试器远程调试的基本功能，重点介绍了远程调试的通信协议。     

基于GDB的ARM硬件调试系统的设计

远程调试是调试嵌入式系统的基本方式。GDB是一款被广泛使用的调试器，但是GDB的孳程调试方案不能完全满足调冀系统开发中的调试需求。文中介绍了一种利用ARM处理器硬件调试模块，扩展GDB远程调试功能的方。案。并以ARM920T处理器为例，描述了该方案的设计与关键功能实现原理。     

基于JTAG的ARM调试器实现

随着uClinux应用与普及,移植uClinux和在Linux开发平台上设计嵌入式应用系统都迫切需要好的调试工具,而现有的Windows下的调试工具很难用于Linux系统.将介绍如何在GDB的基础上,低成本实现嵌入式板的JTAG调试.     

基于Linux的嵌入式交叉编译环境的建立及实现

交叉编译环境是嵌入式开发必不可少的工具,嵌入式系统的可执行文件都是通过交叉编译生成的.通过分步编译Binutils、GCC、glibc和GDB,最终成功完成了基于ARM S3C2410和嵌入式Linux的交叉编译环境的建立,并通过测试,具有可靠的稳定性.与普遍采用的利用Crosstool脚本工具集构建交叉编译环境相比,...     

Effect of Ge profile design on the performance of an n-p-n SiGe HBT-based analog circuit

Two new germanium profiles, graded double box (GDB) and graded step box (GSB), are considered in the base region for an n-p-n silicon-germanium heterojunctions bipolar transistors (SiGe HBTs). Their effects on the performance of the HBT-based common emitter amplifier circuit are investigated so as to predict the behavior of analog circuits in the high-frequency region. An analytical model of an n-p-n SiGe HBT with uniform impurity doping in the base is described, and used to extract SPICE parameters for the devices based on GDB and GSB as well as other two accepted profiles i.e. box and triangular profiles. The frequency response, current gain roll-off and gain-bandwidth product of HBT-based common emitter amplifier circuit for all the four profiles have been compared and contrasted.     

Eclipse的CDT插件分析

CDT是Eclipse开发C/C++的工具,并为专业领域(如嵌入式软件)提供二次开发支持。文章在分析Eclipse和CDT的本身特征的基础上,介绍CDT的功能结构,以C/C++程序开发者的角度,以工程管理、构建管理、运行调试的分类,研究扩展CDT的方法。     

Development of a grout database for geological disposal of high-level radioactive waste

Japan Atomic Energy Agency (JAEA) has developed a grout database (GDB) comprising the latest technical data of grout materials relevant to the geological disposal of high-level radioactive waste (HLW). Currently, only newly developed grout materials of low pH cements, superfine spherical silica and colloidal silica, which are expected to provide a target pH ≤ 11 leachate, are included in the GDB. Case examples from on-site works and laboratory-based tests that have been published in the literature have been used to add construction and material details to the GDB. The GDB is available online (https://groutdb.jaea.go.jp/grout/ [in Japanese]) for registered users to obtain and provide data of grout technology. Furthermore, the GDB can be used to correlate requirements of mechanical, physical, and/or chemical properties of a grout material to specifically address concerns over safety assessment, material and injection method development, and/or prediction of grout penetration.     

Load frequency control of power system under deregulated environment using optimal firefly algorithm

In this paper, a novel Firefly Algorithm (FA) optimized hybrid fuzzy PID controller with derivative Filter (PIDF) is proposed for Load Frequency Control (LFC) of multi area multi source system under deregulated environment by considering the physical constraints such as Generation Rate Constraint (GRC) and Governor Dead Band (GDB) nonlinearity. As the effectiveness of FA depends on algorithm control parameters such as randomization, attractiveness, absorption coefficient and number of fireflies are systematically investigated, the control parameters of FA are tuned by carrying out multiple runs of algorithm for each control parameter variation then the best FA control parameters are suggested. Additionally, the superiority of the FA is demonstrated by comparing the results with tuned Genetic Algorithm (GA). To investigate the effectiveness of the proposed approach, time domain simulations are carried out considering different contracted scenarios and the comparative results are presented. Further, sensitivity analysis is performed by varying the system parameters and operating load conditions. It is observed from the simulation results that the designed controllers are robust and the optimum gains of proposed controller need not be reset even if the system is subjected to wide variation in loading condition and system parameters. Finally, the effectiveness of the proposed control scheme is evaluated under random step load disturbance.     

基于 GDB的多核 DSP平台调试器的设计与实现

随着科技发展,多核处理器正以其高性能、低功耗等优势逐步取代传统的单核处理器成为主场的主流。如何为多核平台开发搭建可靠高效的调试环境亦成为我们所面临的问题之一。基于GDB的移植,针对多核DSP平台提出了一种调试环境的构建方法,能够满足各种主流的调试要求,并具有实现简单,可靠性高的优点。     

基于GDB的ARM硬件调试系统的设计

远程调试是调试嵌入式系统的基本方式。GDB是一款被广泛使用的调试器,但是GDB的远程调试方案不能完全满足调试系统开发中的调试需求。文中介绍了一种利用ARM处理器硬件调试模块,扩展GDB远程调试功能的方案。并以ARM920T处理器为例,描述了该方案的设计与关键功能实现原理。