摘要
Bootloader在嵌入式系统中是必不可少的重要组成部分,这里使用U-Boot 1.3.0在基于PXA255的嵌入式系统上,构建引导加载程序。在对目标板的硬件资源进行简要说明之后,详细分析了U-Boot的启动流程;接着从参考板的选择、目标板支持文件的建立和相关代码的修改,阐述移植的全过程;最后给出了编译和调试的方法。结果表明,U-Boot能稳定地运行。将U-Boot移植到自制的以PXA255为处理器的目标板上,并能成功引导Linux内核,该目标板已经应用于无线传感器网络的汇聚节点,取得了良好的效果。
Bootloader is indispensable and important part of the embedded system. A Bootloader is developed with the U- Bootl. 3.0 based on the PXA255 embedded system. After brief description of the target board hardware resources, this paper analyses booting sequence of U- Boot in detail, then describes whole process of the porting from the choice of reference board, establishment of the supporting document to target board and modification of the correlated code. At last, the method of compiling and debugging is given in this paper. The result shows that U - Boot runs well. The new idea and innovative point of this paper is that transplanting the U - Boot to the self - made target board whose Processor is PXA255 and the U - Boot can lead Linux kernel successfully, the target board has been used in the wireless sensor network sink node and takes good effects.
出处
《现代电子技术》
2009年第6期38-41,共4页
Modern Electronics Technique
