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MP3 Player/Boombox

ECEN 4610: Capstone Laboratory Preliminary Design Review (PDR). MP3 Player/Boombox. Kevin Davis Shane Neuville Dan Chao Andy Owens Christopher Tillery. Project Objectives. Record MP3s off CD-Rom onto hard drive Play MP3s off of hard drive Ability to select current track

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MP3 Player/Boombox

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  1. ECEN 4610: Capstone Laboratory Preliminary Design Review (PDR) MP3 Player/Boombox Kevin Davis Shane Neuville Dan Chao Andy Owens Christopher Tillery

  2. Project Objectives • Record MP3s off CD-Rom onto hard drive • Play MP3s off of hard drive • Ability to select current track • Ability to stop, pause, rewind, and fast forward • Ability to delete songs • Interactive LCD display • Display artist and song title • Display volume level

  3. Division of Labor • Chris: • Processor • Hard Drive / File Storage • CD-Rom • Kevin: • Logic / Bus Control • PCB • User Interface • Dan: • Processor • PCB • MP3 Decoder • Andy: • Logic / Bus Control • PCB • LCD • Shane: • Logic / Bus Control • Hard drive / File Storage • CD-Rom

  4. FPGA • Xilinx • Bus Arbitration • Glue Logic

  5. File Storage • IDE Hard Drive • Store the songs in mp3 format. • Fat 16 • Interface via an 8255 chip • Mp3 Format CD’s • Utilize ID3 tags to separate songs into directories on the hard drive. • User can either play the CD, copy the CD to internal hard drive, or both.

  6. File Storage • Wav format CD’s • User can either play the CD, copy the CD to internal hard drive, or both. • User Specifies CD Name and Artist for wav format CDs. • Files are stored in directories according to Artist and CD.

  7. 8255A Chip Description Chip Mode Selection

  8. Processor • Motorola M68HC12BC32

  9. Processing Power • 16 bit Address and Data Bus Capability • SCI and SPI serial interface • Interfacing with RS232 • Upward Compatible with M68HC11 instruction set

  10. Project Components Hard Drive CD Rom RAM EPROM Data Bus Address Bus Processor FPGA Audio Out Decoder LCD Keypad

  11. MP3 Encoder/Decoder MAS 3587F

  12. Encoder/Decoder Specs • Internal Clock • ADC/DAC • Encoding up to 192 kbit/s • I2C Serial Interface

  13. ID3 Tag Information • 128 bytes at end of MP3 file • Song title: 30 characters • Artist: 30 characters • Album: 30 characters • Year: 4 characters • Comment: 30 characters • Genre: 1 byte

  14. Storage Structure • 1st level of directory structure will be artists name. • 2nd level of directory structure will be CD title • Songs can be stored at any level of the directory structure.

  15. LCD Display - 4x20 characters • Custom Start-up logo • Menu to Choose: • Play Song / Playlist • Copy from CD • Delete Songs • Possible Playlist Editor • Display ID3 tag information: Include at least Song Title and Artist • Playtime and Volume displays possibly using bars

  16. LCD Continued • LCD interacts with keypad through User Interface • LCD display controlled through RS-232 or I2C interface • Buy LCD with controller or use HD44780 chip as controller • Backlight to make viewing easier

  17. Schedule

  18. Cost Estimates • FPGA board: Free (provided by course) • Processor: $15 • MP3 Encoder/Decoder: $35 • LCD Screen with controller: $60 • PCB board: $100 • RAM: $10 • CD-ROM Drive: Free (used) • Hard Drive: Free (used) • Speakers: Free (used) • Miscellaneous Parts: $100 • Labor: Free • Hours spent in basement of engineering center: Priceless • Total Estimated Cost: $320

  19. Positive Impact on Society • Less space wasted by CDs and cases • Eliminates problem of scratched CDs and misplaced CDs • Better parties with greater selection of songs for easier DJing • Adapted to car would result in less accidents caused by careless CD changing • Less CD sales force bands to put on more shows

  20. Negative Impacts • Increased piracy of songs • Less music produced as profits are driven down • Wasted time listening to music may lead to less social interactions • Sound noise may cause deafness • Electrical noise may cause interferences with other devices

  21. Risks and Contingency Plan • Problem with Hard Drive storage system • Simplify folders and file system • Store songs on standard size increments of space to make addressing easier • Problem with reading CD-Rom • Use alternative interface such as USB to upload songs • Preload Mp3s on Hard drive

  22. Risks and Contingency Plan • LCD • Switch to character instead of graphical • Display just file name if ID3 tag information is not available • PCB Board does not work • Debug or redesign layout • Use Protoboard setup

  23. Questions ?????

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