Reproductor Mp3

The AwesomO mp3 “The Swiss Army Knife of mp3 Players”

Critical Design Review The AwesomO Corporation: Kevin Landin

Greg Russo

Terrance Sample

Mike Sells

Jason Taylor

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.

Primary Objectives  Audio Playback Capabilities • •

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

Secondary Objectives  High-Intensity LED Flashlight  Digital Thermometer •

Display Temp on LCD

X Implement FPGA X

X

Simplifies Logic Design Process Easily Modified for Debugging

 Mp3 Digital Voice Recording •

Encode mp3 Files From Microphone Input

X Touch Screen X Interface on LCD to Perform Button Functions (i.e. Play)

 FM Transmitter •

Output Music to an FM Radio Frequency

Basic Hardware Diagram To Ears

ON/OFF

High Intensity LED Flashlight with Dual Action Switch

I2C SPI

Mp3

D/A

Decoder

FM Trans.

PC

CLK

XT

Control Bus TX/RX LCD

Reset

To Eyes

RST PA Mic

PIC18F452 A/D

PD

DATA[0:7]

Play/Pause CompactFlash

Stop Next Previous Record

Priority Encoder

Control Bus

PB

PE

ADDR[0:2]

A/D

Volume +

To PC

Volume USB

Temp. Temp Sensor

PRIMARY HARDWARE SUBSYSTEMS

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

PIC18LF452 Schematic

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

STA015 Schematic

To D/A

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

I2C/SPI Timing Diagrams

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

Software Interface PIC Main

Buttons FAT 16

Mp3

LCD

USB

D/A

CF

SECONDARY HARDWARE SUBSYSTEMS

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

MAX2606 Schematic

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

FTDI USB Schematic

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.

LCD Schematic

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

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

Milestones  Milestone I • 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

Projected Schedule

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

Parts List & Cost 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

Questions?