USB参考资料

附上网上找的usb资料链接，讲的很全面也和通俗易懂！墙裂推荐！

https://www.crifan.com/files/doc/docbook/usb_disk_driver/release/htmls/index.html

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https://www.crifan.com/files/doc/docbook/usb_basic/release/html/usb_basic.html

点击打开链接