usb虚拟网卡与串口
usb虚拟网卡与串口
依赖的驱动模块
# usb
cp /work/code/kernel_gitee/kernel_imx/fs/configfs/configfs.ko ./fixShell/so/
cp /work/code/kernel_gitee/kernel_imx/drivers/usb/gadget/libcomposite.ko ./fixShell/so/
# 网络
cp /work/code/kernel_gitee/kernel_imx/drivers/usb/gadget/function/u_ether.ko ./fixShell/so/
cp /work/code/kernel_gitee/kernel_imx/drivers/usb/gadget/function/usb_f_rndis.ko ./fixShell/so/
cp /work/code/kernel_gitee/kernel_imx/drivers/usb/gadget/function/usb_f_ecm.ko ./fixShell/so/
cp /work/code/kernel_gitee/kernel_imx/drivers/usb/gadget/function/usb_f_ncm.ko ./fixShell/so/
cp /work/code/kernel_gitee/kernel_imx/drivers/usb/gadget/./legacy/g_ether.ko ./fixShell/so/
# 串口
cp /work/code/kernel_gitee/kernel_imx/drivers/usb/gadget/function/u_serial.ko ./fixShell/so/
cp /work/code/kernel_gitee/kernel_imx/drivers/usb/gadget/function/usb_f_serial.ko ./fixShell/so/
cp /work/code/kernel_gitee/kernel_imx/drivers/usb/gadget/./legacy/g_serial.ko ./fixShell/so/
insmod /work/code/kernel_gitee/kernel_imx/fs/configfs/configfs.ko
insmod /work/code/kernel_gitee/kernel_imx/drivers/usb/gadget/libcomposite.ko
insmod /work/code/kernel_gitee/kernel_imx/drivers/usb/gadget/function/u_ether.ko
insmod /work/code/kernel_gitee/kernel_imx/drivers/usb/gadget/function/usb_f_rndis.ko
insmod /work/code/kernel_gitee/kernel_imx/drivers/usb/gadget/function/usb_f_ecm.ko
insmod /work/code/kernel_gitee/kernel_imx/drivers/usb/gadget/function/usb_f_ncm.ko
insmod /work/code/kernel_gitee/kernel_imx/drivers/usb/gadget/./legacy/g_ether.ko
insmod /work/code/kernel_gitee/kernel_imx/drivers/usb/gadget/function/u_serial.ko
insmod /work/code/kernel_gitee/kernel_imx/drivers/usb/gadget/function/usb_f_serial.ko
insmod /work/code/kernel_gitee/kernel_imx/drivers/usb/gadget/./legacy/g_serial.ko use_acm=0
虚拟网卡
https://blog.csdn.net/zhenglie110/article/details/80223167
术语
RemoteNDIS
编译
这里使用模块
Device Drivers —>
[*] USB support —>
<*> USB Gadget Support —>
Ethernet Gadget (with CDC Ethernet support)
[*] RNDIS support
使用
开发板设置
必须确保USB是工作在slave模式的,这个地方6ul的板子控制电平即可
echo 0 > /tmp/gpio/IO_USB0_PWR/value
ifconfig usb0 192.168.77.55 netmask 255.255.255.0
route add default gw 192.168.77.1
HOST设置
# 搜索kindle_rndis.inf_amd64
运行 5-runasadmin_register-CA-cer.cmd
安装 kindle_rndis.inf
设置主机IP
虚拟串口
参考网址
https://developer.ridgerun.com/wiki/index.php/How_to_use_USB_CDC_ACM_and_MS_composite_Linux_gadget_driver
https://blog.csdn.net/hbcbgcx/article/details/88198771
https://blog.csdn.net/yazhouren/article/details/80196344
使用
开发板
# 这里的use_acm=0 表示的就是从设备
insmod /work/code/kernel_gitee/kernel_imx/drivers/usb/gadget/function/u_serial.ko
insmod /work/code/kernel_gitee/kernel_imx/drivers/usb/gadget/function/usb_f_serial.ko
insmod /work/code/kernel_gitee/kernel_imx/drivers/usb/gadget/./legacy/g_serial.ko use_acm=0
host
1. 驱动签名禁止
2. 安装 linux-cdc-acm.inf 修改uid 设备管理器中查看硬件id
3. 串口打开 这里只能在子系统类的unix下使用 win10
错误处理
以下错误可能有两种情况: 1 未设置为从模式 2 不支持同时使用虚拟网卡和虚拟串口
udc-core: couldn't find an available UDC - added [g_serial] to list of pending
调试记录(驱动依赖)
直接安装g_ether,提示找不到符号依赖,搜索 usb_get_function_instance,或者更好的是在ubuntu下使用modinfo,然后使用find -name xxx.ko
insmod g_ether.ko
g_ether: Unknown symbol usb_get_function_instance (err 0)
vmuser@ubuntu:~/work/code/kernel_gitee/kernel_imx/drivers/usb/gadget$ modinfo ./legacy/g_ether.ko
filename: /home/vmuser/work/code/kernel_gitee/kernel_imx/drivers/usb/gadget/./legacy/g_ether.ko
license: GPL
author: David Brownell, Benedikt Spanger
description: RNDIS/Ethernet Gadget
srcversion: 5E4C828D24F6E477C9CB5EE
depends: libcomposit
如下搜索
modinfo drivers/usb/gadget/./legacy/g_ether.ko
find -name "configfs.ko"
find -name "libcomposite.ko"
find -name "u_ether.ko"
find -name "usb_f_rndis.ko"
modinfo ./drivers/usb/gadget/function/usb_f_rndis.ko
完整的依赖如下
[root@EPC-M6Y2C kernel_imx]# lsmod
Module Size Used by Not tainted
g_ether 5247 0
usb_f_ecm 6843 1
usb_f_rndis 16183 2 g_ether
u_ether 12156 3 g_ether,usb_f_ecm,usb_f_rndis
libcomposite 44608 3 g_ether,usb_f_ecm,usb_f_rndis
configfs 24103 4 usb_f_ecm,usb_f_rndis,libcomposite
然后依赖查找安装
insmod ./drivers/usb/gadget/function/u_serial.ko
insmod ./drivers/usb/gadget/function/usb_f_serial.ko
insmod drivers/usb/gadget/./legacy/g_serial.ko
[root@EPC-M6Y2C kernel_imx]# lsmod
Module Size Used by Not tainted
usb_f_serial 3061 0
u_serial 9720 1 usb_f_serial
g_serial 3693 0
g_ether 5247 0
usb_f_ecm 6843 1
usb_f_rndis 16183 2 g_ether
u_ether 12156 3 g_ether,usb_f_ecm,usb_f_rndis
libcomposite 44608 5 usb_f_serial,g_serial,g_ether,usb_f_ecm,usb_f_rndis
configfs 24103 5 usb_f_serial,usb_f_ecm,usb_f_rndis,libcomposite
insmod u_serial.ko
insmod libcomposite.ko
insmod usb_f_serial.ko
insmod usb_f_obex.ko
insmod usb_f_acm.ko
insmod g_serial.ko use_acm=0 # 这个是从
