基于U-boot的USB接口系统更新方案设计  

Design of system update based on U-boot through USB interface

作　　者：余柳冰[1] 高明煜[1] 

机构地区：[1]杭州电子科技大学电子信息学院,浙江杭州310018

出　　处：《机电工程》2011年第9期1109-1112,共4页Journal of Mechanical & Electrical Engineering

摘　　要：为了在保证较低成本的基础上提高嵌入式设备的系统更新速度,分析了串口、网络以及USB接口这3种可选方案的优、缺点,研究并设计了基于通用加载器(U-boot)的USB接口系统更新方案。具体介绍了U-boot下USB设备端口驱动的实现,着重分析了U-boot下中断向量表的搬移过程,并在AT91SAM9261处理器平台上实现了基于U-boot的系统下载更新功能。实验结果证明,该方案可以在简单的硬件配置上达到500 KB/s左右的更新速度。In order to improve the system-updating speed of embedded devices on the basis of low cost,both advantages and disadvantages of serial port,network and USB interface were analyzed.A system-updating method through USB interface based on universal boot loader（U-boot） was implemented.The implementation of USB device driver in U-boot was introduced,the movement of the interrupt vector table was analyzed,and the updating function was successfully accomplished on AT91SAM9261 processor.The experimental results show that the fast updating speed about 500 KB/s has been achieved with simple hardware configuration in practice.

关 键 词：通用加载器 中断向量表 系统更新 

分 类 号：TP392[自动化与计算机技术—计算机应用技术]