wsl2 支持 usb 串口

最近要测一个设备，搜了搜，发现 WSL2 已经有主机串口使用方案了，社区牛人真不少。终于不用每次使用 socat 转发了。

注：以下 Windows 命令需要管理员权限

Windows 安装 USBIPD-WIN 项目

winget install --interactive --exact dorssel.usbipd-win

太慢，下载不了，还是手工下载安装吧。。下载地址

WSL2 安装 linux-tools/hwdata

sudo apt install linux-tools-virtual hwdata
sudo update-alternatives --install /usr/local/bin/usbip usbip `ls /usr/lib/linux-tools/*/usbip | tail -n1` 20

Windows 列出所有连接的 USB 设备

usbipd wsl list

BUSID  VID:PID    DEVICE                                                        STATE
1-2    2717:ff40  Redmi 9A                                                      Not attached
1-3    27c6:5125  Goodix Fingerprint USB Device                                 Not attached
1-6    13d3:5488  HD Camera, Camera DFU Device                                  Not attached
1-10   8087:0026  英特尔(R) 无线 Bluetooth(R)                                   Not attached
2-1    0bda:8152  Realtek USB FE Family Controller                              Not attached
2-2    25a4:9311  USB C Video Adaptor                                           Not attached
2-3    1ea7:0064  USB 输入设备                                                  Not attached
2-4    0403:6001  USB Serial Converter                                          Not attached

启动 WSL2

wsl -u ljd

Windows 关联 USB 串口到 WSL2

usbipd wsl attach --busid 2-4

2-4 为上面列出的 BUSID。偶尔会附加不上，反复多试试。

wsl2 中查看 usb 设备

lsusb

Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 0403:6001 Future Technology Devices International, Ltd FT232 Serial (UART) IC
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

查找 USB 设备对应的设备文件

dmesg | grep -5 FT232

[   17.078734] usb 1-1: new full-speed USB device number 2 using vhci_hcd
[   17.168559] vhci_hcd: vhci_device speed not set
[   17.238554] usb 1-1: SetAddress Request (2) to port 0
[   17.289763] usb 1-1: New USB device found, idVendor=0403, idProduct=6001, bcdDevice= 6.00
[   17.292305] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   17.292748] usb 1-1: Product: FT232R USB UART
[   17.292968] usb 1-1: Manufacturer: FTDI
[   17.293191] usb 1-1: SerialNumber: AB63OS0E
[   17.300507] ftdi_sio 1-1:1.0: FTDI USB Serial Device converter detected
[   17.301155] usb 1-1: Detected FT232RL
[   17.302566] usb 1-1: FTDI USB Serial Device converter now attached to ttyUSB0
[   49.581429] hv_balloon: Max. dynamic memory size: 8090 MB

串口设备读写权限

sudo chmod a+rw /dev/ttyUSB0

使用完成后，Windows 下分离，或直接物理断开 USB 设备

usbipd wsl detach --busid 2-4

时兼容时不兼容，不知道什么情况。