摘要
镜像下载功能是嵌入式系统中bootloader程序的一个重要功能,对嵌入式系统开发效率影响较大.本文在USB设备的功能单元层定义了简单的数据传输协议,并基于此协议在PXA255平台上实现了bootloader下的镜像下载功能,实践证明该方案可以在简单的硬件配置上达到较快的传输速度.
Image download function is important in embedded system development for its great influence on develop efficiency.This paper gives a simple data transfer protocol on the functionality layer of USB device framework,and realized the data transition using USB interface integrated in the PXA255 chip.Faster transmission was achieved with simple hardware configuration in practice.
出处
《电子器件》
CAS
2007年第2期651-653,657,共4页
Chinese Journal of Electron Devices
