Android Open Accessory support allows external USB hardware (an Android USB accessory) to interact with an Android-powered device in a special accessory mode. When an Android-powered powered device is in accessory mode, the connected accessory acts as the USB host (powers the bus and enumerates devices) and the Android-powered device acts in the USB accessory role.
This ADK library is based on NXP Kinetis Microcontroller KL26, It implements some functions to communicate with android phone.
The file is embedded in the document, in the last page.
Regards,
Santiago