什么是端口号usb设备命令？

Question

我将用C++为USB设备编写程序，并显示端口号，当您输入终端root@raminfp# usb-device时，您将看到输出：

T:  Bus=02 Lev=01 Prnt=01 Port=00 Cnt=02 Dev#=  3 Spd=12  MxCh= 7 

Port:00或Port:01是什么意思？

Answer 1

https://www.mjmwired.net/kernel/Documentation/usb/proc_usb_info.txt

T:  Bus=dd Lev=dd Prnt=dd Port=dd Cnt=dd Dev#=ddd Spd=dddd MxCh=dd
118 |   |      |      |       |       |      |        |        |__MaxChildren
119 |   |      |      |       |       |      |        |__Device Speed in Mbps
120 |   |      |      |       |       |      |__DeviceNumber
121 |   |      |      |       |       |__Count of devices at this level
122 |   |      |      |       |__Connector/Port on Parent for this device
123 |   |      |      |__Parent DeviceNumber
124 |   |      |__Level in topology for this bus
125 |   |__Bus number
126 |__Topology info tag