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USB Gadget
==========
# Introduction
This README describes a way the USB Gadget feature can be used on Renesas Porter boards.
## Hardware setup
To use the USB Gadget feature, you need an extra micro-USB cable.
The proposed setup is based on the selection of USB OTG feature by configuring the jumper JP13 between 1-2 ("Host"). Then, you can plug the cable in CN22 connector ("USB Channel 0").
## Software setup
Be sure you have the "usbgadget" feature in the DISTRO_FEATURES bitbake environment variable.
# Usage
## Manual configuration
Example to uses Ethernet over USB feature:
# modprobe g_ether
# ip a | grep -A 2 usb0
5: usb0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 4e:bc:d4:ab:7e:e5 brd ff:ff:ff:ff:ff:ff
# ip address add 192.168.0.10 dev usb0
Now, from your host computer you can check connectivity:
$ ping 192.168.0.10
PING 192.168.0.10 (192.168.0.10) 56(84) bytes of data.
64 bytes from 192.168.0.10: icmp_seq=1 ttl=64 time=0.370 ms
64 bytes from 192.168.0.10: icmp_seq=2 ttl=64 time=0.406 ms
...
## Persistent configuration
We can load the module at startup, by creating a file `/etc/modules-load.d/g_ether.conf`.
The file content should be as below:
# Load g_ether at boot
g_ether
Connman can handle the Ethernet over USB link. First, we create the directory which
contain the configuration file:
# mkdir /etc/connman
Then we can edit a `/etc/connman/main.conf` file:
[General]
PreferredTechnologies=ethernet,wifi,cellular
PersistentTetheringMode=true
TetheringTechnologies=gadget
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