基于SEP5010芯片的引导方案的研究与优化  

Research and Optimization of Booting Scheme Based on SEP5010 Chip

作　　者：鲍丹[1] 时建龙[1] 戚隆宁[1] 胡晨[1] 

机构地区：[1]东南大学国家专用集成电路系统工程技术研究中心,江苏南京210096

出　　处：《现代电子技术》2008年第22期1-3,11,共4页Modern Electronics Technique

基　　金：国家自然科学基金资助项目:SOL存储子系统高层建模和存储器内存布局优化技术(60676011)

摘　　要：系统引导是嵌入式系统开发过程中的一个重要环节,其启动速度是嵌入式系统一个重要指标。对东南大学自主研发的SEP5010芯片的引导方案的研究,正是从提高启动速度,缩短启动时间方面来考虑的。从配置最优分频比、打开缓存(I-cache)、选择下载协议、设计不同功能的启动方式这4个方面对引导方案进行研究与优化。实验表明,通过以上优化,系统启动时间大大缩短,启动速度平均要提高84.7%,满足了嵌入式系统对快速启动的要求。目前,该引导方案已经成功应用于一款手持导航设备。System booting is an important aspect in real -time embedded system,of which booting speed is one of the most important indexes. As to the realization and optimization methods of the system booting scheme based on SEP5010 chip independently developed by Southeast University, this research mainly considers how to increase the booting speed and shorten the booting time. Through the research of configuring optimal frequency division ratio, opening I--cache, selecting downloading protocol and designing several booting schemes with different functions, the booting performance can be obviously increased. the optimization described above in the experiment which on real platform could improve the average booting time by 84.7 %, which satisfies the demand of fast booting in embedded system. Presently, the booting scheme has been applied to a handheld navigation device.

关 键 词：系统引导 SEP5010 缓存 XMODEM 

分 类 号：TP302.1[自动化与计算机技术—计算机系统结构]