【作者】 吴凯；

【导师】 阳富民；

【作者基本信息】 华中科技大学 ， 计算机应用技术， 2013， 硕士

【摘要】 嵌入式系统的一个主要特点是硬件平台的多样性，因此使嵌入式操作系统在不同的硬件平台上能有效地运行，是嵌入式系统开发过程中需要解决的一个关键问题。板级支持包(BoardSupportPackage，简称BSP)，是位于嵌入式操作系统和硬件之间的中间层软件系统，它的主要任务是屏蔽底层硬件平台的多样性，提供对硬件设备的操作控制，加载和引导嵌入式操作系统，为嵌入式系统的开发提供调试环境。根据板级支持包的功能需求，构建了BSP系统的整体结构。同时考虑到BSP系统的扩展性和移植性，将BSP系统分为四个主要模块：启动引导模块、硬件驱动模块、命令交互模块和烧写升级模块。启动引导模块实现了BSP系统的启动初始化过程，为嵌入式系统的运行提供合适的软硬件环境，实现了嵌入式操作系统的加载和引导。硬件驱动模块实现了BSP系统中常用到的串口设备和NANDFlash设备的驱动，为了便于扩展和移植，封装了设备驱动的对外接口。命令交互模块完成了命令处理过程的设计与实现，提供了添加新命令的接口，实现了BSP系统中常用到的一些命令。烧写升级模块完成了烧写系统和升级系统的设计与实现：烧写系统完成了烧写过程的设计、通讯协议的扩展和烧写工具的实现；升级系统完成了U盘升级和在线升级两种升级方式的实现。更多还原

【Abstract】 A primary feature of the embedded system is the diversity of hardware platforms, therefore a key issue for embedded system development is how to make the embedded operating system can effectively run on different hardware platforms. BSP(Board Support Package) is a software system located in the intermediate layer between the embedded operating system and hardware,and its main tasks includes shielding the diversity of the underlying hardware platform, providing the control of the hardware device,booting the embedded operating system, providing the debugging environment for the development of embedded system.According to the requirements of BSP functions, the overall structure of BSP was established. Considering the scalability and portability, the BSP system was divided into four main modules:system boot module, hardware driver module, command interaction module and burning upgrade module.The system boot module implemented the initialization of system and the booting of embedded operating system.The hardware driver module implemented the driver program of serial device and NAND Flash device, wrapped the drivers with an external interface.The command interaction module completed the design and implementation of command processing procedure, provided the interface of adding new command, and implemented commands commonly used.The burning upgrade module completed the design and implementation of burning and upgrade system:the burning system designed the burning processing procedure, expanded the communication protocol and implemented the burning tools; the upgrade system implemented two upgrade approaches of U disk upgrade and network upgrade.更多还原