kernel menuconfig

  • -> Device Drivers ->USB support -> USB Gadget Support
  • 建议最好选成M，作为内核驱动模块，便于与其他Gadget驱动共存
<M>   USB Gadget Drivers 

<M>     Ethernet Gadget (with CDC Ethernet support)

[*]       RNDIS support
  • 更新uImage和rootfs

 

启动linux，加载g_ether驱动

# modprobe g_ether
[  318.955068] using random self ethernet address
[  318.959586] using random host ethernet address
[  318.964711] usb0: HOST MAC 9e:cd:8c:e2:e1:63
[  318.969052] usb0: MAC ba:ae:51:91:76:54
[  318.972924] using random self ethernet address
[  318.977379] using random host ethernet address
[  318.981934] g_ether gadget: Ethernet Gadget, version: Memorial Day 2008
[  318.988564] g_ether gadget: g_ether ready
[  318.992590] dwc2 f6000000.usb_otg: bound driver g_ether

查看USB虚拟网卡：USB0就是

# ifconfig
eth0      Link encap:Ethernet  HWaddr 02:67:AB:81:02:BB
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          Interrupt:16 Base address:0x1000

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

usb0      Link encap:Ethernet  HWaddr BA:AE:51:91:76:54
          inet addr:169.254.169.223  Bcast:169.254.255.255  Mask:255.255.0.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:25 errors:0 dropped:21 overruns:0 frame:0
          TX packets:9 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:4369 (4.2 KiB)  TX bytes:1598 (1.5 KiB)

用USB线连接PC机，配置IP

  • Windows系统的PC机需安装RNDIS虚拟网卡驱动（下面PC是用的ubuntu）
  • PC识别成功后会出现新的网卡设备
  • 配置PC和板卡两端IP为同一网段

enp0s20f0u10 为PC识别到的USB网卡设备：

OptiPlex-3050:~$ ifconfig
enp0s20f0u10 Link encap:Ethernet  HWaddr 9e:cd:8c:e2:e1:63
          inet addr:10.42.0.1  Bcast:10.42.0.255  Mask:255.255.255.0
          inet6 addr: fe80::b0a1:e9ef:39b5:a0b5/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:155598 errors:0 dropped:2 overruns:0 frame:0
          TX packets:77909 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:233303187 (233.3 MB)  TX bytes:5155821 (5.1 MB)

enp1s0    Link encap:Ethernet  HWaddr e4:54:e8:9b:55:23
          inet addr:10.10.46.239  Bcast:10.10.47.255  Mask:255.255.254.0
          inet6 addr: fe80::73c5:dab2:c7c0:8fb6/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:112393 errors:0 dropped:4 overruns:0 frame:0
          TX packets:12121 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:34254996 (34.2 MB)  TX bytes:939336 (939.3 KB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:67007 errors:0 dropped:0 overruns:0 frame:0
          TX packets:67007 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:4993833 (4.9 MB)  TX bytes:4993833 (4.9 MB)

设置同一网段，测试ping：

# ifconfig usb0 10.42.0.2
#
#
#
# ifconfig
eth0      Link encap:Ethernet  HWaddr 02:67:AB:81:02:BB
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          Interrupt:16 Base address:0x1000

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

usb0      Link encap:Ethernet  HWaddr BA:AE:51:91:76:54
          inet addr:10.42.0.2  Bcast:10.255.255.255  Mask:255.0.0.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:108 errors:0 dropped:65 overruns:0 frame:0
          TX packets:18 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:17442 (17.0 KiB)  TX bytes:2898 (2.8 KiB)

# ping 10.42.0.1
PING 10.42.0.1 (10.42.0.1): 56 data bytes
64 bytes from 10.42.0.1: seq=0 ttl=64 time=0.933 ms
64 bytes from 10.42.0.1: seq=1 ttl=64 time=0.520 ms
64 bytes from 10.42.0.1: seq=2 ttl=64 time=0.486 ms
64 bytes from 10.42.0.1: seq=3 ttl=64 time=0.472 ms
64 bytes from 10.42.0.1: seq=4 ttl=64 time=0.463 ms
64 bytes from 10.42.0.1: seq=5 ttl=64 time=0.456 ms
64 bytes from 10.42.0.1: seq=6 ttl=64 time=0.561 ms
64 bytes from 10.42.0.1: seq=7 ttl=64 time=0.465 ms

 

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