1. The AwesomO mp3 “The Swiss Army Knife of mp3 Players”
Critical Design Review
The AwesomO Corporation:
Mike Sells
Terrance Sample
Greg Russo
Kevin Landin
Jason Taylor

2. Main Goal
Our main goal is to build a fully functional mp3 player that not only plays music, but also includes features not seen on current mp3 players.

3. Primary Objectives Audio Playback Capabilities User Interface Buttons
Mp3 Decoding
Headphone Port
User Interface Buttons
Play & Stop
Next Song & Previous Song
On/Off Switch
Temp Switch
Flashlight Button
Volume Control
LCD Display
Display Song & Artist Information
Display Song Clock
Compact Flash Storage
USB 1.1 Interface
File Transfer Interface between player and PC

4. Secondary Objectives High-Intensity LED Flashlight Digital Thermometer
Display Temp on LCD
Implement FPGA
Simplifies Logic Design Process
Easily Modified for Debugging
Mp3 Digital Voice Recording
Encode mp3 Files From Microphone Input
Touch Screen
Interface on LCD to Perform Button Functions (i.e. Play)
FM Transmitter
Output Music to an FM Radio Frequency

5. Basic Hardware Diagram
Temp Sensor
USB
TX/RX
To PC
Temp.
Previous
Record
Volume +
Volume -
Priority
Encoder
Play/Pause
Stop
Next
Mic XT
Reset PB
CLK
RST
A/D
CompactFlash
LCD
Mp3
Decoder FM
Trans.
D/A PA PC PD PE
PIC18F452
DATA[0:7]
I2C
Control Bus
ADDR[0:2]
To Ears
To Eyes
SPI
High Intensity LED Flashlight with Dual Action Switch
ON/OFF

6. PRIMARY HARDWARE SUBSYSTEMS

7. 8-Bit Microcontroller PIC18LF452
Key Features:
Internal Flash Memory – 32kb program memory/ 1.5kb RAM
8 Channel 10 bit ADC
34 In/Out Data Channels (5 Ports A-E)
I2C / 3-wire SPI/ EUSART Serial Port Interfaces
C compiler optimized
Ideal for low power applications
Supported by PIC start plus and visualization programmer

8. PIC18LF452 Schematic

9. Mp3 Decoder/Encoder STA015
Decodes mp3 files into stereo, mono, or digital format and extracts ID3 tag info
Encodes an external audio source into mp3 format
Digital volume, bass, and treble controls
Supports I2C and SPI interfaces for communications with the PIC
Uses low power CMOS technology for portable applications

10. STA015 Schematic
To D/A

11. CS43L42 D/A Converter Built in headphone amplifier
2 Extra audio output lines for use by the FM transmitter
24-bit precision
Digital bass and treble boost
From mp3 Decoder

12. I2C/SPI Timing Diagrams

13. CompactFlash Storage 8-bit Data Transfers to Conserve Pins
Using Memory Mode for Addressing

14. Software Interface
PIC Main
Buttons
FAT 16
Mp3
LCD
USB CF
D/A

15. SECONDARY HARDWARE SUBSYSTEMS

16. FM Transmitter MAX2606
Designed specifically for wireless communications systems
Can be tuned to frequencies between 70 and 150Mhz
Provides a secondary output channel
Perfect for using mp3 player in a car or over a home stereo

17. MAX2606 Schematic

18. FTDI USB Controller
Will allow device to interface with a PC for downloading files to the CompactFlash card at slow speeds
Data rate of 12Mb/s
Uses RX/TX pins from serial interface on PIC
Host side drivers available for main stream operating systems

19. FTDI USB Schematic

20. LCD Display Size is 20x2 dot matrix LCD character display.
Controller is built in using a port on the PIC.
LCD will display song and artist name using ID3 tag.
LCD will also display track time and temperature.

21. LCD Schematic

22. High-Intensity LED Flashlight
Another useful tool that will increase marketability, commonly seen on key chains – so why not on an mp3 player?
Even simpler to implement, can be wired as a separate circuit

23. Digital Thermometer
Everyone wants to know what the temperature is outside, making this a very useful marketing tool
Simple circuitry, can easily be monitored by the PIC
To PIC

24. Milestones Milestone I Milestone II Expo
Basic interfacing with Compact Flash
Ability to read data
Milestone II
Mp3 playback
User interface software implemented
Expo
Complete working “swiss army knife” of mp3 players!
Non-essential hardware implemented

25. Projected Schedule

26. Divisions of Labor Kevin: Compact Flash Greg: LCD Display
John: Mp3 Decoder/Encoder
Mike: USB
Jason: Mp3 Decoder/Encoder
All: Software & Documentation

27. Parts List & Cost Total $183.62 Processor: PIC18F452
Mp3 Decoder: STA015T
FM Transmitter: MAX2606
D/A: CS43L42
LCD: CFAH2002A-RMI-JT
Temp. Sensor: TC1047
USB Chip: FT232BM
Volt Level Shifter: 74LVC4245
8-3 Line Priority Encoder: SN54HC148
Mic Amp: MAX9813L
High Intensity LED
CompactFlash Card
PCB (2-layer)
Res., Caps., Connectors, etc.
$11.88
$19.30
$ 0.90
$ 5.87
$25.00
$ 0.88
$ 5.20
$ 0.39
$ 0.55
$ 0.70
$20.00
$19.95
$33.00
$40.00
Total
$183.62

28. Questions?