I trying to get network connection to work via gadget mode, but not yet succeed.
Latest olimex image icludes g_ether module and looks like it loads ok
root@a20-olinuxino:~# uname -a
Linux a20-olinuxino 5.10.36-olimex #105318 SMP Thu May 13 10:54:34 UTC 2021 armv7l GNU/Linux
[ 897.275687] using random self ethernet address
[ 897.275713] using random host ethernet address
[ 897.275725] using host ethernet address: 00:11:22:33:44:55
[ 897.276884] usb0: HOST MAC 00:11:22:33:44:55
[ 897.277060] usb0: MAC a2:a6:ea:c0:87:db
[ 897.277125] using random self ethernet address
[ 897.277135] using random host ethernet address
[ 897.277248] g_ether gadget: Ethernet Gadget, version: Memorial Day 2008
[ 897.277262] g_ether gadget: g_ether ready
I have modified /etc/modules like this (not loading g_serial)
# /etc/modules: kernel modules to load at boot time.
#
# This file contains the names of kernel modules that should be loaded
# at boot time, one per line. Lines beginning with "#" are ignored.
#g_serial
sun4i_ts
g_ether host_addr=00:11:22:33:44:55
But when I plug USB_OTG cable to Windows 10, I see only new COM port "USB Serial Device (COM9)" but not any new ethernet interfaces?
Ideas?
Looks like you need to install RNDIS driver to Windows 10. I followed this guide https://supportcommunity.zebra.com/s/article/Install-RNDIS-Driver-to-connect-RFID-reader-via-USB?language=en_US (https://supportcommunity.zebra.com/s/article/Install-RNDIS-Driver-to-connect-RFID-reader-via-USB?language=en_US) and now I have "USB Ethernet/RNDIS Gadget" network interface on Windows 10, but it says "cable not connected".
Got it.
In linux side I need to setup ip address for the usb0 interface get it up
root@a20-olinuxino:~# ifconfig usb0 192.168.11.11
root@a20-olinuxino:~# ifconfig usb0 up
And also put ip address to interface on Windows side, and now it works. Looks like the speed is equivalent as 100 Ethernet NIC.
Initially I followed this thread https://www.olimex.com/forum/index.php?topic=3916.0 (https://www.olimex.com/forum/index.php?topic=3916.0) but it not worked for me.
Here is how I get it to work
On A20-OLinuXino with latest Olimex debian buster image
1. add line "g_ether" to /etc/modules file
2. add file /etc/network/interfaces.d/usb0 and put following lines (gateway if needed)
allow-hotplug usb0
iface usb0 inet static
address 10.0.1.2
netmask 255.255.255.0
network 10.0.1.0
broadcast 10.0.1.255
#gateway 10.0.1.1
3. reboot linux
At this point Windows 10 identified Gadget RNDIS device wrongly to "USB Serial Device (COM9)". Driver must be changed to get device "USB Ethernet/RNDIS Gadget" installed. To get working driver follow this guide https://supportcommunity.zebra.com/s/article/Install-RNDIS-Driver-to-connect-RFID-reader-via-USB?language=en_US (https://supportcommunity.zebra.com/s/article/Install-RNDIS-Driver-to-connect-RFID-reader-via-USB?language=en_US).
Now I have working network connection between A20-OLinuXino and Windows 10 via USB cable and it works directly from (re)boot.