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Autonomous Clock Project Part A GPS CLOCK INTERFACING WITH AN LCD

Autonomous Clock Project Part A GPS CLOCK INTERFACING WITH AN LCD. ECE 345 Design Project Professor Gary Swenson T.A. Ajay Patel Presented By: Antwan Williams. Project Goals. Design a clock that will display the correct time according to position. Use an LCD to display time and location.

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Autonomous Clock Project Part A GPS CLOCK INTERFACING WITH AN LCD

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  1. Autonomous Clock Project Part AGPS CLOCK INTERFACING WITH AN LCD ECE 345 Design Project Professor Gary Swenson T.A. Ajay Patel Presented By: Antwan Williams

  2. Project Goals • Design a clock that will display the correct time according to position. • Use an LCD to display time and location.

  3. Description • Receive a signal from the Global Positioning System (GPS) that gives correct time and position. • Send that information to the HC12 Motorola Microcontroller. • Take that information and display it on the AND501/GST LCD. FOR MORE INFO...

  4. Technology • Ashtech’s GPS G8 OEM Boards • Small board • Needed programming • LCD interface not included • Used GPS NMEA standards • NMEA 0183 messages OEM: Original Equipment Manufacturer

  5. GPS Evaluate Software

  6. THE PLAN • HC12 use it’s transmission/receive registers to send NMEA commands to the GPS device. • HC12 would then receive time and location from the GPS device. • HC12 adjusts the time depending on the location it receives. • Uses index registers to display it on the LCD.

  7. SCHEMATIC

  8. SERIAL COMM. SOFTWARE FLOWCHART

  9. LCD SOFTWARE FLOWCHART

  10. CHALLENGES • HC12 didn’t have the correct pin numbers on their printed on their I/O board. • Broken LCD • Modifying the code to increment to the next character and cease it from outputting nonsense to the LCD.

  11. Modifications • Portability • Smaller GPS device • 4*8 character LCD

  12. $ COST OF HARDWARE • HC12 = $????.?? • GPS = $750.00 • LCD = $30.00

  13. NEW GPS WATCH BY CASIOFOR $499.00

  14. Team/Resources • Need for GPS watches… • Special Thanks to: • Ajay • Professor Swenson

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