usb驱动的源代码有需要的就下吧。

USB2.0的技术规范 英文-USB2.0 specification English

Windows CE操作系统下的USB设备驱动开发-Under the Windows CE operating system, USB device driver development

很不错的USB仿真软件-very good USB Simulation Software

usb芯片访问外设――usb和1553b总线的接口访问时序。-USB chip interfaces peripheral through 1553b bus, interface timing.

This code can detect the insertion of USB device in the system

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.

usb与RS232之间的通信，包括主机程序，固件源程序。采用HID类！我现在需要USB键盘方面的源程序，如果你有请提供crzman@163.com-between USB and RS232 communications, including mainframe procedures, firmware source. Using HID category! I now need a USB keyboard aspects of the source, if you have please provide crzman@163.com

philips的udisk程序源码。-philips source of udisk procedures.

这个程序用180行C代码就能够读取FAT16文件系统U盘的根目录,可以看到根目录下的文件 名,并可显示 首文件内容,不过,该程序很不严谨,也没有任何错误处理,对U盘兼容性较差,只是用于简单试 验,作为参考. 这个程序可以支持WINDOWS按FAT16格式化的U盘,因为程序精简,所以只兼容超过50%以上的U 盘品牌,如果换 成CH375A芯片则兼容性可提高到85%,当然,如果使用WCH公司的子程序库或者正式版本的C源 程序兼容性更好-this procedure with 180 OK C code can read FAT16 file system drives the root directory, we can see the root directory under the file name, would show the first document, but the very stringent procedures, and there is no error handling, the U-poor compatibility, but for the simple test a post-mortem as a reference. this procedure can be supported by Windows FAT16 formatted U disk, because the procedure is streamlined and therefore only compatible with more than 50% of the U-brand, if chips were replaced CH375A compatibility can be increased to 85%, if the company"s use of WCH Subroutine Library or an official version of the C source better compatibility

Usb camera frame render library