USB OTG Driver Registry Settings (Windows Embedded CE 6.0)
1/6/2010
The following information describes the registry keys necessary for universal serial bus (USB) On-The-Go (OTG) drivers.
You can affect the behavior of USB OTG drivers using the registry key HKEY_LOCAL_MACHINE\Drivers\BuiltIn\UsbOtg. The following table shows the named values for this registry key.
| Value : type | Description |
|---|---|
DynamicClientLoad : DWORD |
Bit 0 indicates whether the USB function requires dynamic loading. Bit 1 indicates whether the USB host controller driver requires dynamic loading. This value is assumed to be zero if it is not present in the registry. |
InitialRoleMaster : DWORD |
This registry value indicates that the device wants to become a host if conditions allow for it. |
DisableRoleSwitch : DWORD |
This registry value indicates whether the device has disabled role switching. |
HCDPortNumberOnOTG : DWORD |
This registry value indicates which USB host controller driver port is connected to the USB OTG port. |
The subkey HKEY_LOCAL_MACHINE\Drivers\BuiltIn\UsbOtg\Hcd must exist for USB OTG to support a USB host controller. Similarly, the subkey HKEY_LOCAL_MACHINE\Drivers\BuiltIn\UsbOtg\UsbFn must exist for USB OTG to support a USB function controller.