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Accessories: USB Host Adapter

Our Price: grey currently not in stock.
While most devices have an USB OTG mini AB plug, the Freerunner has a simple client side USB mini B plug, although it can be operated in Host mode.

This is a special USB Host adapter that fits and allows to connect any standard USB A device (or an external Mini Hub) to the Neo Freerunner.

It does not have the electronic signalling of a real USB OTG plug to automatically switch between client and host mode but the commands are shown below.

Note: since this is not a fully standard compliant device it is possible to do something harmful (i.e. two devices in being connected in Host Mode and trying to provide each other with power). Therefore, be careful and use at your own risk.

Enable USB Host mode (with 5V power!)

echo "host" > /sys/devices/platform/s3c2410-ohci/usb_fmode
echo "1" > /sys/devices/platform/neo1973-pm-host.0/hostmode

Disable USB Host mode

echo "device" > /sys/devices/platform/s3c2410-ohci/usb_fmode
echo "0" > /sys/devices/platform/neo1973-pm-host.0/hostmode

See Also: http://wiki.openmoko.org/wiki/USB host
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