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Trackmate

Trackmate. Nathan Beste, Justin Flair, Arzhang Badiozamani, Evan Graves. ECE 189 A/B Spring 2013. The Idea!. The Idea!. + = ?. Overview.

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Trackmate

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  1. Trackmate Nathan Beste, Justin Flair, Arzhang Badiozamani, Evan Graves ECE 189 A/B Spring 2013

  2. The Idea!

  3. The Idea! + = ?

  4. Overview Trackmate is a GPS enabled MP3 player that allows athletes to track their speed and distance using GPS data. It provides an easy and intuitive touch screen interface and an SD card for data transfer.

  5. Printed Circuit Board

  6. Microprocessor: NXP LPC2478 • ARM7 processor • Controls peripherals • SDRAM support • LCD Controller with TFT support • SD card memory interface • SPI interface controller for audio decoding and LCD display • RS-232 peripheral interface for GPS and programming the processor

  7. High Level Block Diagram LPC2478 Microprocessor

  8. Printed Circuit Board

  9. TFT LCD Display With Touchscreen • Used to display interface to user as well as GPS data and MP3 playback • Capacitive Touch Panel Control • 24-Bit RGB Interface for display • Each pixel can display over 16 • million different colors! • Challenges: • Configuring the interfaces • Parsing the touch data

  10. High Level Block Diagram User Interface (buttons/touch screen) TFT LCD Display With Touchscreen LPC2478 Microprocessor

  11. Printed Circuit Board

  12. MP3 Audio Decoder and Output • MP3 Audio Decoder: • Used to decode MP3 audio files stored • on the SD card • SPI interface • Volume control built in • Audio Output: • Used for the output of the MP3 decoder to any audio system • Challenges: • Configuring the registers • Verifying the data path

  13. High Level Block Diagram User Interface (buttons/touch screen) TFT LCD Display With Touchscreen LPC2478 Microprocessor VS1011e Audio Decoder Audio Output

  14. Printed Circuit Board

  15. RS-232 Connector and Level Shifter • Used for programming the processor. • Helpful for debugging and testing peripherals. • Necessary to boot up the processor and run code.

  16. High Level Block Diagram RS-232 Connector and Level Shifter User Interface (buttons/touch screen) TFT LCD Display With Touchscreen LPC2478 Microprocessor VS1011e Audio Decoder Audio Output

  17. Printed Circuit Board

  18. SDRAM • 128MB of storage • Used to store data read from the SD card for fast access later • send audio data to the audio decoder • send video and pictures to the display • Challenges: • Partitioning the SDRAM addressing several components. • Configuring the pins

  19. High Level Block Diagram RS-232 Connector and Level Shifter User Interface (buttons/touch screen) 128 MB SDRAM TFT LCD Display With Touchscreen LPC2478 Microprocessor VS1011e Audio Decoder Audio Output

  20. Printed Circuit Board

  21. SD Card Reader • Uses proprietary 4-bit SD/MMC interface • Files on card organized using FAT16 • Used to store user video, pictures and audio • Difficulties: • Understanding the 4 part SD specification • Figuring out the DMA interface • Parsing the FAT system

  22. High Level Block Diagram RS-232 Connector and Level Shifter User Interface (buttons/touch screen) 128 MB SDRAM TFT LCD Display With Touchscreen LPC2478 Microprocessor VS1011e Audio Decoder SD Card Reader Audio Output

  23. Printed Circuit Board

  24. GPS with Internal Antenna • Outputs a timestamp with GPS coordinates • Distance and Speed is displayed on LCD • Difficulties: • Communication through UART • Parsing the GPS strings

  25. High Level Block Diagram RS-232 Connector and Level Shifter User Interface (buttons/touch screen) 128 MB SDRAM TFT LCD Display With Touchscreen LPC2478 Microprocessor PMB-648 GPS Module VS1011e Audio Decoder SD Card Reader Audio Output

  26. Video Demonstration:

  27. Technology and IP Re-use • GPS Module • SDRAM • Processor • Audio Decoder • LCD Display and Touch Screen • RS-232 Level Shifter • SD Card

  28. What we did right: • Good organization and design • Effective teamwork • Kept the project to a reasonable level of implementation • Dedicated ourselves to specific peripherals to be able to work in parallel after fabrication • Read through individual data sheets before programming peripherals • Sacrificed most of our social lives to complete the project

  29. What we did wrong: • Correctness of board layout and error checking • Leaving parts of the board until the last minute to fix • Waiting too long to start programming the board • Voltage regulators • Not preparing GPIO pins for testing the processor • DIP switch issues

  30. Advice to future students: • Get a head start and make sure to read and understand ALL of the datasheets (especially for the processor) • Check for errors in board layout and peripheral specifications over and over again, there's never too much you can check for • Test Pins are cheap! Use them freely! Makes debugging easier • Make sure there is plenty of support for a peripheral before buying it

  31. Improvements and thoughts • PCB is proof-of-concept • Final product could be much smaller • A final implementation could use a low power, low cost processor. • (NXP generously donated current processor) • Mass production will drop the cost

  32. Group Photo

  33. Thanks to all!!! UCSB ECE Department Professor Johnson Joseph Malcom ECE Shop

  34. And one final thank you to….

  35. Questions?

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