xMP3 Team Senior Project Design Review

1
xMP3 Team Senior ProjectDesign Review

• Dan Pulsipher Team Leader, Audio
• Stephen Moore Hardware Expert
• Aaron Rasmussen Software Expert
• Jeff Bush MP3 Expert

2
Software Overview
3
Software Component Breakdown

• uClinux for OS
• Built in TCP/IP
• Easier to code for
• boa for web server
• device drivers/component integration

4
MP3 Overview
5
Software Decoding

• Initial MatLab .wav files
• Software Profiling

6
Hardware Overview
7
Hardware Component Breakdown

• Buffer in BRAM
• Hardware Decoding based on software profiling

8
Digital Controller
DAC Controller

• Features
• Serial Interface for the PCM1770 TI DAC
• Data Format Control
• Digital Volume Control
• 0 db to -62 db control
• Auxiliary Input Enable

9
Digital Controller
DAC Controller

• Initial Format Setup

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Digital Controller
DAC Controller

• Mute and Volume settings

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Digital Controller
DAC Controller
Data Output State Machine
bclk0
Init
Wait for ready
Left
ready1
nmax
bit n
ccsready
lrclk1 AND bclk0
lrclk0 AND bclk0
bclk0
bit n
Right
nmax
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Audio Overview
13
Audio Component Breakdown

• Prototype
• Board design

14
Project Innovations

• Volume Control via Dip Switches
• Auxiliary Input Jack
• MP3 Streaming Capability

15
Team Schedule

• Team Website
• http//www.et.byu.edu/groups/xmp3/sched.htm