1. Proximity Sensor Board: Progress Report II
Michel Kinsy
Nathan Ellefsen
Ryan Fig
Sarat Bhogavalli
Mentor: John Winters

2. Introduction Overview Progress E-Field Code (Functional)
Microphone Code (Functional)
Merging E-Field & Microphone code
Future Goals
Demo
Q & A

3. Overview MC56F8300 Has a speaker, 10 LED’s and a Headphone Jack
E-field sensor that does proximity detection
Has a Parallel port and JTag connector

4. Progress: E-Field Code
Changed E-field code
Modified music note played in each state
Tailored SineTable to middle C scale (8 notes)
Adjusted SineTableStep variable for each state
Issues:
Initial loud clipping sound from speaker
Consistency of detecting nothing when no object present

5. Progress: Microphone Code
Recorded voice onto board and playback
Modified PLL Lock
Record up to 5 second message
Press “IRQA” button to record
LED’s react to voice
Press “SW1” to playback
Issues:
Microphone sensitivity

6. Progress: Merging E-Field & Microphone Code
Goal: Maximize functionality of board
Not fully functional
Current Problems:
Keeping code size small
Limitation of small on-chip RAM
Debugging erratic behavior

7. Future Goals
Successfully combine E-Field & Microphone code to maximize functionality
Hardcode our own message into playback table for the E-field “Alert”
Improve consistency of E-Field proximity detection

8. Demo

9. Q & A