Linux usb驱动学习

USB拓扑结构

• 主从结构
• 数据交换只能发生在主从设备之间，主机与主机之间或从机与从机之前是不能通信的。
• OTG是一种可以实现主从机角色切换的协议
• 所有从机必须通过集线器
  https://blog.csdn.net/thisway_diy/article/details/129195042

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usb接口类型https://zhuanlan.zhihu.com/p/447595295