ECE 477 Design Review Group 6  Fall 2005 Project G.N.O.M.E. Marcus Funk Logan Burns Lindsey Hall Nikhil Gahlawat

Outline Project overview Project-specific success criteria Block diagram Component selection rationale Packaging design Schematic and theory of operation PCB layout Software design/development status Project completion timeline Questions / discussion

Project Overview Project G.N.O.M.E. is a GPS-based navigational system Guides the user/vehicle along a pre-stored route [on-board 32Mbit Flash IC]. Provides an LCD for displaying navigational information [e.g. current location, heading, and time]. Provides a Keypad [connected to LCD] for retrieving user input. Provides audio directions based on stored-route and GPS data received. Detects and notifies the user when veering off the pre-stored route.

Project-Specific Success Criteria An ability to encode route information and store it in a non-volatile memory. An ability to correlate real-time GPS data with stored route information [includes handling the “non-exact” nature of real time GPS data relative to stored waypoints]. An ability to decode [look-up] “actions” and display them on an LCD based on correlation between GPS data and stored route information. An ability to generate audible commands based on decoded “actions.” An ability to detect variance from the stored route [e.g. “you missed the last turn”] and suggest an alternate route [e.g. “take the next right, then right, then left”]

Block Diagram FLASH GPS AUDIO LCD/Keypad

Component Selection Rationale Microcontroller selection criteria: SPI for external flash memory SCI for GPS receiver unit 16 I/O pins for audio record/playback device 16 additional I/O pins to interface with parallel to USB converter Clock speed – fast enough to complete required calculations between GPS updates GPS updates ~ 1Hz Availability Selected Microcontroller - Freescale MC9S12C32 80-QFP

Packaging Design Packaging Size: 2”(H) x 7”(W) x 7”(D) Standard car audio bay Features: Backlit LCD Screen 6-Button Keypad Interface Speaker Vents for audio Weight: (approx) 3 lbs

Schematic/Theory of Operation Microcontroller

Schematic/Theory of Operation GPS Interface

Schematic/Theory of Operation LCD/Keypad Interface

Schematic/Theory of Operation Logic Level Converters Serial FLASH

Schematic/Theory of Operation Audio I/O

Schematic/Theory of Operation Bypass Capacitors

Schematic/Theory of Operation Reset, BKGD PLL Clock Oscillator

PCB Layout

PCB Layout Microcontroller

PCB Layout GPS

PCB Layout LCD/Keypad

PCB Layout Flash Memory

PCB Layout Audio

Software Design/Development Status Development board up and running Demonstration program completed and working Software flow-chart underway for entire system Software under development for LCD/Keypad Interface Software development to progress as additional components are prototyped and tested

Project Completion Timeline Date Completion Date Sunday, October 16 - Website Completed Thursday, October 20 - Final Schematic/PCB Layout Changes & Parts Acquisition Thursday, October 27 - Component Prototyping/Testing Completed - Patent Liability Analysis Completed/Submitted Begin testing PCB, mounting components Thursday, November 3 - Safety & Reliability Analysis Completed/Submitted Thursday, November 10 - Major Software Modules Completed - Software Narrative Completed/Submitted - Final Software development/Testing Begun - PCB Tested & All Components Mounted/Soldered - Final Hardware development Begun Thursday, November 17 - Environmental Analysis Completed/Submitted Thursday, November 24 THANKSGIVING DAY Nov 28 – Dec 9 - Final Testing/Debugging - Project Demonstration - User Manual Due (Dec 1) Dec 14 Project Completed/Reports Submitted/

Questions / Discussion