1. Home Theater Remote Final Presentation Date: May 16, 2008 Team: Bryan Follis, Mike Schmidt, Dan Grissom, Jesse Butler Advisor: Dr. David Klotzkin

2. Project Focus • Problem • More entertainment centers incorporating Home Theater Personal Computers (HTPC) • Current entertainment setups require too many remotes • No intuitive or mainstream HTPC/home-entertainment remote exists • Solution • Design a remote that stresses better control and simplicity through the integration of a universal remote and mouse • Three modes of operation • Infrared - Command home theater devices using IR transmission • HTPC - Full mouse control of a HTPC using Bluetooth to have the HTR appear as a serial mouse • Gesture - HTR interprets physical movement and transmits commands to all home entertainment devices using IR or Bluetooth

3. System Overview

4. PIC Microcontroller • All inputs and outputs of HTR interface with the microcontroller • Executes firmware dynamically based upon variable input

5. Serial Bluetooth Module • Acts as transceiver to interface the PIC with a HTPC • Emulates a serial port to allow the HTR to appear as a serial mouse • Implemented using Dual Inline Package (DIP) Bluetooth module

6. Infrared Transmitter and Device Code Module • Takes input from PIC and transmits commands to IR devices • Acts as reference for IR codes for all generic home entertainment devices (TVs, DVD Players, Cable Boxes, Auxiliary Devices, etc)

7. Infrared Transmitter and Device Code Module • No available IC • Need ability to transmit any IR command without a physical button press • Use the PIC to emulate button presses through the use of analog multiplexers

8. Three-Axis Accelerometer • Interfaces between physical user movement and PIC • Senses remote movement by monitoring the acceleration imposed on any axis (gravity) • Implemented using DIP Accelerometer module

9. Movement Algorithms • Hardware limitations inhibit possibility of absolute location references • Tilt-based pointing used to emulate gestures and mouse movement • Start and stop accelerometer references used for gestures • Continuous references and quantizations used for mouse movement

10. Button Input • Button input captured via parallel-input shift registers • Button state checked over 50 times a second • Input processed by PIC in a serial fashion

11. Tools of Implementation • gEDA used for hardware schematics

12. Tools of Implementation • MPLAB used for PIC programming interface

13. Tools of Implementation • Eagle used for board layout

14. Tools of Implementation • Fabricated our own boards using rudimentary etching process

15. Design Alterations • Capacitive sensing • Fully designed, removed for time constraints

16. Design Alterations • LED-Backlit Buttons • Contextual button lighting fully designed, removed for time constraints

17. Design Alterations • Bluetooth: Human Interface Device vs. Serial Interface • HID Bluetooth development is expensive and proprietary, thus HTR had to be redesigned with serial Bluetooth • Used a modified serial mouse kernel driver in Linux • Due to time constraints: • No fabrication of full system board • No case created • No power saving code

18. Project Milestones • Firmware architecture designed • Hardware schematics completed • PIC microcontroller functionality verified • Accelerometer implemented and verified • Bluetooth implemented and verified • IR implemented and tested • Tilt gestures tested and verified • Tilt mouse functionality verified in Linux • All major modes of operation functional

19. Results – Mouse Functionality(USB Serial)

20. Results – Mouse Functionality(Bluetooth Serial)

21. Results – Gesture Functionality

22. Results – Full IR Functionality