我将使用 C++ 为 USB 设备编写程序，并显示端口号，当您在终端中输入时，root@raminfp# usb-device您将在输出中看到：
T: Bus=02 Lev=01 Prnt=01 Port=00 Cnt=02 Dev#= 3 Spd=12 MxCh= 7
Port:00或是什么意思Port:01？
答案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