] hub 1-1:1.0: unable to enumerate USB device on port 3
lsusb -t给予:/: Bus 04.Port 1: Dev 1, Class=root_hub.Port 1: Dev 1, Class=root_hub, Driver=sw-ohci/1p, 12M /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=sw-ehci/1p, 480M |__
我是一个新手,正在学习如何为USB设备编写Linux设备驱动程序。我想了解dmesg输出[ 6870.500057]hub 2-0:1.0: unable to enumerate USB device on port 5
[ 6871.444057] usb 2-5: new low-speed USB
我有桌面与ASUS总理X 370亲主板和技术规格,所有的USB端口是3.0或3.1,没有2.0端口。问题是所有公开的USB端口都被确认为2.0。我正在运行Ubuntu18.04.3 LTS。# lsusbBus 005 Device 001: ID 1d6b:0002Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 <em
如何在Linux下控制连接到USB口的继电器(一路)? 这张图片展示了usb电缆连接。 ? 当继电器连接到usb端口时,继电器设置为连续。但在终端执行lsusb时,系统找不到该设备。27c6:5110 Bus 001 Device 002: ID 0458: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 0
: usb-storage 7-3:1.0Linux media 4.4.0-57-generic #78-Ubuntu SMP Fri Dec 9 23:50:32 UTC 20161d6b:0001 Linux Foundation 1.1 root hubBus 006 Device 001: ID 1d6b:0002 Linux Founda
:0002 Linux Foundation 2.0 root hubBus007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux FoundationBus 009 Device 001: ID 1d6b:0002 Linux Founda
📷lsusb -t/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 5000M |__ Port 9: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M注意:
在Windows计算机上使用相同的<e
: ID 1d6b:0003 Linux Foundation 3.0 root hubBus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003Device 001: ID 1d6b:0002 Linux Foundation 2.0 root h