links for 2011-05-11

May 12, 2011
  • <blockquote>
    Inside the box are two sub micro servos, a shield that’s loaded with buttons, LEDs, relays, and more. And the board itself is based on the Arduino Mega design, with the USB host module added (this means that there are two USB ports: one to connect to the Android phone, and the usual one to connect to your computer for programming/serial monitor access):
    And once you get it running, you’ll be able to play around with the demo board. One of the app’s tabs lets you play with inputs (buttons, capacitive sensing, joystick, temperature, light) and the other lets you control outputs (servos, LEDs, etc.). Have fun!
  • <blockquote>components of the ADK include:&nbsp;<div><ul><li>A USB micro-controller board that is based on the Arduino Mega2560 and Circuits@Home USB Host Shield designs (now referred to as the ADK board), which you will later implement as an Android USB accessory. The ADK board provides input and output pins that you can implement through the use of attachments called "shields." Custom firmware, written in C++, is installed on the board to define the board's functionality and interaction with the attached shield and Android-powered device. The hardware design files for the board are located in hardware/ directory.&nbsp;</li><li>An Android Demo Shield (ADK shield) that affixes atop the ADK board implements the input and output points on the board. These implementations include a joystick, LED outputs, and temperature and light sensors. You can create or buy your own shields or wire your own features to the ADK board to implement custom function…</li></ul></div></blockquote>
  • "The Android 3.1 platform (also backported to Android 2.3.4) introduces Android Open Accessory support, which 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 […]  and the Android-powered device acts as the device. Android USB accessories are specifically designed to attach to Android-powered devices and adhere to a simple protocol (Android accessory protocol) that allows them to detect Android-powered devices that support accessory mode. […] Many previously released Android-powered devices are only capable of acting as a USB device and cannot initiate connections with external USB devices. Android Open Accessory support overcomes this limitation and allows you to build accessories that can interact with an assortment of Android-powered devices by allowing the accessory initiate the connection.

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