USB 飞力浦固件开发源码:基本业务处理功能，完整开发文档，已编译通过-the USB source of Philips: the base function ,all empolder source code,can compile OK.

pic mcu code:This application note describes the design and implementation of a USB Mass Storage Device (MSD) using a Secure Digital card, which should prove useful to developers of USB mass storage solutions. This application may be used as

USB开发工具，MS提供，可以读取所有USB设备的descr iptor表。是USB开发者的好帮手。

微软的point of sale的源代码，可用作USB转串口的驱动程序-MS s point of sale source code, can be used as usb2serial driver.