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====== Edge2 USB Gadget ======

{{page>/products/sbc/common/configurations/usb-gadget&noheader}}

===== Usage of ADB =====

ADB is enabled by default, you can access the device directly via adb:

<code shell>
$ adb kill-server
$ adb devices
* daemon not running; starting now at tcp:5037
* daemon started successfully

List of devices attached
12036c819990    device

$ adb shell
root@Khadas:/#
</code>

===== Enable Other USB Functions =====

You can dynamically switch USB functions by writing to ''/tmp/.usb_config'' and restarting the ''usbdevice'' service.

  * **Enable RNDIS**
<code shell>
echo usb_rndis_en > /tmp/.usb_config
sudo usbdevice restart
</code>

  * **Enable ACM**
<code shell>
echo usb_acm_en > /tmp/.usb_config
sudo usbdevice restart
</code>

  * **Enable UAC**
<code shell>
echo usb_uac_en > /tmp/.usb_config
sudo usbdevice restart
</code>

  * **Enable UVC**
<code shell>
echo usb_uvc_en > /tmp/.usb_config
sudo usbdevice restart
</code>

After enabling UVC, run:
<code shell>
uvc-gadget rockchip/functions/uvc.0 -d /dev/videoX
</code>
> Note: Replace ''X'' with the actual video node number.

  * **Enable UMS**
<code shell>
echo usb_ums_en > /tmp/.usb_config
sudo mkdir -p /userdata/
dd if=/dev/zero of=/userdata/ums_shared.img bs=1M count=1024
</code>

UMS mode requires the empty ''ums_shared.img'' file (1GB in the example above), which will be recognized as a storage drive by the host system.

===== RNDIS Setup IP Address =====

After enabling RNDIS, configure the IP address manually. For example, set the device IP to ''192.168.35.100'':

<code shell>
sudo ifconfig usb0 192.168.35.100 up
</code>

Also configure the IP on the host PC, for example ''192.168.35.110''.

Test the network connection:

<code shell>
ping -I usb0 192.168.35.110
</code>