The working principle of remote online update for embedded system is presented. The hardware platform of the system and the design principle of software are introduced. This paper presents the scheme of remote online update for embedded system which is based on the communication mode of Internet and this scheme was tested, the result shows that this scheme has a high rate of success for update and a fast speed for update.%介绍了嵌入式系统远程在线升级的工作原理,并详细阐述了系统硬件平台及软件的设计原理,提出了基于Intemet通信方式的嵌入式系统远程在线升级的方案,并对该方案进行了测试,测试结果表明:该方案具有较高的升级成功率和较快的升级速度。
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