mountain bike rallying mid-term presentation february 20, 2008

Mountain Bike Rallying Mid-term Presentation

February 20, 2008

Team Members

Frank HollandPSoC to LCD interfacePSoC to GPS interfacePSoC to PC communication

Michael VanJava GUI CodingPSoC to PC InterfacePSoC to GPS Interface

Andrew ThigpenJava GUI coding

PC to PSoC InterfaceButton Interface

Overview• Background

• Problem

• Solution

• Constraints

• Practical

• Technical

• Approach Trade-Offs

• Hardware

• Software

• Timeline

• References

Background

•Car Rally

•Geocaching

Problem

•Bike rider needs a navigator

•Current GPS units are not suitable for this sport

Solution

Practical ConstraintSustainability

•Ruggedness

•Must be able to withstand a drop from 3 feet

Practical ConstraintEnvironmental

•Operating Conditions

•Must be water resistant

•Must withstand temperatures from -4° to 110°F

Technical Constraints• Tracking Accuracy

• The GPS must have an accuracy of 5 meters or less.

• Battery Life

• The overall product must have at least 6 hours of continuous battery life.

• Display Size

• The display size must be able to hold 20 x 4 characters on the screen.

• Product Size

• The product size must 3” x 6” x 3” or less.

• Product Weight

• The overall product must be less than 2 lbs.

Hardware Block Diagram

GPS Receiver

Display (LCD)

Microcontroller (µC)

Computer (PC)

Transmit GPS data to µC

Provides information to LCD

Provides time data to PC

Uploads coordinates to µC

PSoC

• Internal crystal oscillator for watch dog timer

• Less external components required to do today’s applications

• Local producer of PSoC at Cypress Semiconductors Corp. in Starkville, MS.

GPS Receivers Tradeoffs

Features Garmin GPS 15L-W MightyGPS OEM

Channels 12 12Voltage Max 5.4V 8.0VCurrent Max 100 mA 90 mA

Signal Reacquisition Time

2 sec 1 sec

Warm Start Time 15 sec 35 secCold Start Time 45 sec 45 secGPS Accuracy <3 meter 5 meter

Cost $53.50 $48

Garmin GPS 15L-W

•Accuracy of less than 3 meters

LCDs TradeoffsFeatures Crystalfontz

CFAG12864B-TFH-VHantronixHDM20416L-M-L30S

Voltage Max 9.8 V 7.0 V

Current Max 90 mA 1925 mA

Display Type Transflective Transflective

Display Format Graphical Character

Cost $33.82 $36.68

Crystal Fontz CFAG12864B-TFH-V

•Less current draw

•Graphical display

•Cheaper

PC SoftwareTradeoffs

• Java

• Cross-platform by design

• Same bytecode portable across all platforms

• Built-in libraries

• Serial Communication

• Databases

• Rapid GUI prototyping with free Eclipse IDE

• C++

• Cross-platform toolkits available

• Must be compiled on each platform

• No built in libraries

PC SoftwareBlock diagram

•User Data

•GPS Data

•Graphs

•Courses

• Serial Device Communication

•Maps

Functional Hierarchy

PC Software

PC SoftwareProgress

Timeline

January February March April

Research

PC Software

PSoC Software

PC/PSoC Communication

LCD Testing

Hardware Testing

References

[1] http://website.lineone.net/~maultby/car%20rally%20ringwood3.jpg

[2] http://www.geocaching.com

[] Garmin, “GPS 15H & 15L Technical Specifications,” Feb. 2006. [Online]. Available: http://www.garmin.com/manuals/237_TechnicalSpecifications.pdf [Accessed Feb. 17, 2008].

[] MightyGPS, “MightyGPS OEM Module,” 2004. [Online]. Available: http://www.mightygps.com/oem/MightyGPS40EBLS.pdf [Accessed Feb 17, 2008].

[] Cypress, “PSoC® Mixed-Signal Array Final Data Sheet CY8C29466, CY8C29566, CY8C29666, and CY8C29866,“ Feb. 15, 2007. [Online]. Available: http://download.cypress.com.edgesuite.net/design_resources/datasheets/contents/cy8c29466_8.pdf [Accessed Feb. 17, 2008].

[] Hantronix, “HDM20416L-M Dimensional Drawing 20 Character x 4 Lines, Large Character, LED Backlight,” [Online]. Available: http://www.hantronix.com/down/20416lm.pdf [Accessed Feb. 17, 2008].

[] Crystalfontz, “CFAG12864B-TFH-V Graphic LCD Module Data Sheet Hardware vA / Data Sheet v1.0,” Dec. 15, 2006. [Online]. Available: http://www.crystalfontz.com/products/datasheet/274/CFAG12864BTFHV.pdf [Accessed Feb. 24, 2008].

Questions?