网络安全嵌入应用中的BOOTLOADER

Bootloader in Embedded Application of Network Security

Bootloader是网络安全嵌入软件开发实现的第一步,也是最重要的一步,直接影响应用程序在设备加电后是否能够正常加载运行,也影响设备从加电到正常运行间的时间,影响用户的体验。因此,讨论Bootloader的基本属性,并通过一个简单的实例详细描述引导加载过程,同时就如何满足现场升级、在应用编程(IAP)等方面的应用需求进行阐述,以助于网络安全嵌入式系统开发人员尤其是初学者深刻理解Bootloader。

The design and implementation of Bootloader is the first and most important step, in a embedded environment of network security, this directly influences program loading and running of the devices after power-on, and also affects boot time of the devices and thus the user＇s experiences. This article discusses some basic properties of Bootloader, describes in detail the Bootloader process via a simple example, and makes an elaborate interpretation of how to satisfy such application demands as field upgrade and IAP（In- Application Programming）. All this could help the developer of network security embedded system, especially the beginner, deeply understand Bootloader.