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Senior Design Project

Senior Design Project. “ MP3 Player ” Brian P. Allen Zeeshan A. Khan Jerry T. Koshy. Objectives . What? – Create a portable MP3 player Why? – To integrate software with hardware and implement our fundamental engineering knowledge. MP3 Technology Introduction. MPEG Audio Layer 3

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Senior Design Project

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  1. Senior Design Project “ MP3 Player ” Brian P. Allen Zeeshan A. Khan Jerry T. Koshy

  2. Objectives • What? – Create a portable MP3 player • Why? – To integrate software with hardware and implement our fundamental engineering knowledge.

  3. MP3 Technology Introduction • MPEG Audio Layer 3 • File format • Compressed • Maintains quality • Used for Music

  4. Basic Steps of MP3 Player

  5. Components Model

  6. Selection Process Criterion • Simplicity • Economical • Versatility • Voltage Consistency • Familiarity • Compatibility • Interfacing Ability

  7. Microprocessor • “Brain” • Functions: • User Input • Retrieves memory data • Commands to DSP • Display Information

  8. PIC16F877 key features • Small instruction set (35) • RISC • Several I/O ports • Operating voltage range (2.0v to 5.5v) • Previous knowledge • Low cost

  9. PIC16F877 Pin Diagrams

  10. Decoder • Functions: • Serial control • Decompression • Digital signal processing

  11. VS1001k key features • Single-chip solution • Built-in DAC • Built-in amplifier • Handles MPEG layer 1, 2 and 3 audio • 4kB built-in RAM • Can handle variable bit rates

  12. VS1001k Pin Diagram

  13. VS1001k Block Diagram

  14. Memory • Functions • Data Storage • Nonvolatile • Update data • Transportable • Increases data capacity

  15. Multimedia Card key features • High storage capacities • Non-volatile solid state • No moving parts • Fewer pins than other devices • Low power consumption • Low cost

  16. MMC Pin Diagram

  17. MMC Block Diagram

  18. Other Parts • Power Supply • LED’s • Switches • Crystal • SOIC-DIP converter • Voltage Regulator • 3.5 mm Audio Jack

  19. MMC to PIC • FAT file system • USB 2.0 port • SPI interface • Master/Slave GND VCC PIC DATA BUS

  20. PIC • Resets MMC & decoder • SPI Commands • Read memory sector • Transfers data to decoder • User Interface • Display Interface

  21. Decoder • Data request • Decoding • Analog/Digital hybrid volume control • DAC • Stereo earphone driver

  22. PIC to Decoder

  23. Schematic

  24. Budget

  25. Phase 1 Phase 2 Phase 3 Feb Mar Apr May Jun July Sep Oct Nov Dec Schedule Phases: • Research & Component Selection • Preliminary Design & Ordering of Parts • Construction & Testing

  26. Progress • Completed: research, component selection and purchase, and preliminary design. • Currently: programming microprocessor and constructing circuit.

  27. MP3 player in the making • (insert picture here)

  28. The End

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