Wii Remote Zibo Zou, Daniel Maertens, Steven Duan 1

What is a Wiimote?  The Wii is a video game console made by Nintendo at around 2006.It was the first console to use an interactive remote  A player could use motions and gestures in addition to buttons to play games  The remote is a light rectangular shaped controller that contains a combination of built-in accelerometers and infrared detection.  Expanded to the remote is a “nunchuk”, which holds an accelerometer and a traditional analog stick. 2

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Outputs  Sound  Wii Remote can make its own sound  Can be calibrated with Wii sound to make a 3D sound effect  Example: shooting bow and arrow  Rumble  Vibrates the remote for feedback during games  Implemented as small motor attached to off center weight 4

Accelerometer  ADXL330 Accelerometer by Analog Devices (in the Wiimote)  Used to send acceleration on x, y, z axis  Mostly used during games that require movement.  LIS3L02 (in the Nunchuk) 5

Sensor Bar  Emitter for IR light  10 IR LEDs  Used to orient Wiimote and to calculate the rotation of the Wiimote  Does not actually communicate with the Wii or the Wiimote  The IR Camera in the Wiimote is the PixArt Multi Object Tracking, responsible for sensing motion from the remote Aaps%2Ck%3Anintendo%20wii%20sensor%20bar 6

Bluetooth Communication  Broadcom BCM2042 (Bluetooth 2.0)  Used to transmit data from remote to Wii  Data sent  Position (calculated from IR sensor),  Accelerometer XYZ,  Buttons (A, B, power, etc)  Optional Data from add-ons / additional remotes  Nunchuck: analog joystick, accelerometer  Wii MotionPlus: tuning-fork gyroscope, single axis gyroscope 7

Data Reporting  The Bluetooth establishes a HiD (Human Interface Device) connection with the Wiimote and its host.  A report can be thought of a network port assigned to a particular service.  A HiD descriptor block is used, which holds an enumeration of reports that the Wiimote can understand.  An “Input” report is sent by Wiimote to the host and is prepended by 0xA1  An “Output” report is sent by host to the Wiimote and is prepended by 0xA2 8

Generalized Example of Data Reporting Request Core Buttons Request Wiimote movement Request IR Camera Position Return Core Button Data Return Accelerometer Data Return IR Camera Position From Address: 0x33 9

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Peripherals: 6-Pin Expansion Controllers  The Wiimote has a series of 6-pin expansion port connected at the bottom of the Wiimote.  The 6-pin expansion ports are communicated through I2C serial connection.  The communication is encrypted, but people have found ways to decrypt it.  Examples:  Nunchuck  Wii MotionPlus Gyroscope  Classic Controller  Guitar Hero 3 Guitar  Wii Balance Board 11

Nunchuk  Specifically, the nunchuk has  6 types of data readable at register address 0xA40008  C and Z buttons are membrane switches  Joystick is an axial potentiometer, 30K ohms  Different accelerometer from the Wiimote  LIS3L02 Accelerometer  Different microcontroller from the Wiimote ages/wiinunchuck1.jpg 12

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Wii MotionPlus  Add on to the normal Wii remote that adds additional functionality  Biggest features include adding 2 gyroscopes  Pass through external extension connector  Allows use of other add ons at the same time ia/File:Wiimote-with-Motionplus-Attach.jpg 14

Gyroscope  Used in the Wii MotionPlus to add additional functionality  Allows remote to capture complex motion more accurately  Nintendo: “Enables actions to be rendered identically on the screen in real time”  Actually includes 2 different types of gyroscopes  Dual axis Tuning fork gyroscope (InvenSense IDG-600)  Measures pitch and roll  Single axis gyroscope (EPSON TOYOCOM X3500W)  Measures yaw will-have-a-software-installer /?page=2/ 15

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Example of Utilizing the Wii Motion Plus 17

DEMONSTRATION 18

QUESTIONS??? 19

References All the References are in the notes. The below are just the important links nction_result