将s3c2410作为usb设备，本程序是在纯裸机状态，即没有操作系统下实现，将编译好的2进制文件直接烧到Nand flash的零地址，即可实现将s3c2410作为usb设备。-Will S3C2410 as usb devices, this procedure is bare metal in a pure state, that is, realize there is no operating system will be bes