A presentation on my senior project for the Computer Engineering Department at UCSB. Class of 2006.

1. Gaucho 9000 MP3 Player
A Senior Capstone Project
Brendon Bolin | Daniel Junger | Gabriel Trejo

2. Background
• Team Introduction
– Daniel Junger
– Brendon Bolin
– Gabriel Trejo
• Why an MP3 player?

3. How did we do?
• Initial Goals
– 192 kbps playback capability
– Buttons: Play, Pause, Next, Previous
– File Info on LCD display
• The Results
– 320 kbps playback rate including VBR!
– Damaged MP3 and partial downloads
– GUI host software

4. The Gaucho Player

5. The Gaucho Player
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6. System Overview
MP3 DECODER
AUDIO DAC
3.5MM STEREO JACK
4 INPUT
BUTTONS
LCD Display
32-BIT Microprocessor
ARM7 w/ 256+16KB FLASH
128KB Socketed
FLASH
RS232
SERIAL
16MB Intel FLASH
Brendon – User Interface GuyDaniel – Software Architect GuyGabriel – Boot / Audio Guy
Proprietary File Transfer Protocol
File System Implementation

7. Software Outline
Main() {
ConfigPeripherals(); // Set PLL, RTC, UART, I2C, Flash
.. // BSPI, EIC, XTI, LCD
While(1) { // main execution loop
switch(mode) {
case PLAY:
ButtonHandler();
case PAUSE:
ButtonHandler();
case BROWSE:
ButtonHandler();
}
RefreshDisplay();
}
}

8. State Diagram
Browse
PlayPause
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9. The Capstone Experience
• Winter Quarter
– Manufacturing Process
• Spring Quarter
– Software Implementation
– Debug Time!
• Fall quarter
– Hardware Design

10. A Trip to the Assembler
Rapid Prototypes Inc., Santa Paula
Solder Masks
Rapid Prototypes Inc., Santa Paula

11. Battle Scars
• Initial power up failure = 4 new boards!
– Always check and double check system
constraints
TOP
VCC
GND
BTM
GOOD = )
VIA VIA
TOP
VCC
GND
BTM
BAD =- (

12. More Battle Scars
• Learning the right tools
– It’s worth it to take the time to learn
complex tools
• The right tools are not always
available
– Flex your problem solving skills

13. We bequeath to you our..
• ..appetite for challenge
• ..cooperation within a team
• ..patience in light of disaster
• ..pride in accomplishment

14. Thank You!
Steven Butner
Computer Engineering Department
The Good Shepard that helped us through the whole process
Bob Stevensen
ECE Electronics Shop
For bailing us out whenever we broke a board or goofed up
Jorge Gonzales
Rapid Prototypes
For your timeliness and commitment to quality