linux平台下使用的usb接口库，带有测试实例，使用实例(Linux platform used under the USB interface library, with test examples, the use of examples)

libusb 是一个非常好用的USB开发开源库，很多人已经借此制作了令人惊奇的硬件(libusb, a very useful USB-developing opensource library code, has enabled many people to make fantastic hardwares.)

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