usb设备检测程序，对初级HID编程人员很有用，可以检测设备的VID,PID值,usb device detection program, for junior programmers HID useful equipment can detect VID, PID value

USB接口测试程序源代码设计,可以很方便的进行调试外部的基于CY7C680001 的usb接口设备.-USB port test program source code for the design, can easily be debugged outside of the usb interface device based on the CY7C680001.