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

2. Introduction Board Overview Applications for Board Original Problem Statement Our Analysis of the Problem Different Design Approaches & Implementation Phases E-field Sensor Voice Recorder Hybrid System Attempt Conclusion Q & A

3. » 32K to 512K Flash memory » Up to 60 MIPS » DSP and MCU functionality » JTAG real-time debugging » Four 36-bit accumulators » Three 32-bit address buses » Large peripheral set » MCU-style software stack support » Controller-style operating modes Board Hardware Layout

4. MC56F8323 CPU MC33794 Electric Field Imaging Device RESET button IRQ button SW1 button GPIO / SERIAL Port (16 pin)* TIMER / PWM Port (16 Pin)* ADC Port (10 Pin)* JTAG Port (14 pin) 10 LED’s Microphone with amplifier Stereo Audio output with filters & AMP 3.5mm Stereo jack Speaker Demonstration Board Features

5. Applications for Board Automotive control Industrial control/networking Motion control Home appliances General purpose inverters Medical monitoring

6. Original Problem Statement - E-field Initial loud clipping sound from speaker Lack consistency of detecting nothing when no object present - Microphone Latencies in recording and lack of quality.

7. Our Analysis of the Problem Board Schematics

8. Sine Table Modification Modify current buzzing noise Make sound more appealing

9. “Alert” Analysis

10. Sine Table Frequencies

11. Design Approaches & Implementation Phases E-Field Code Modified the PWM Interrupt method - Checks for the calibrated board and an object in contact. - if((SineTableStep == 21) && (Calibrate == 0)) If current state is less than 10; gives a note from the sine table Modified music note played in each state - Tailored SineTable to middle C scale (8 notes) - Adjusted SineTableStep variable for each state

12. New Sine Table Frequencies

13. 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 Code // reenable buttons BTN1_Enable(); BTN2_Enable(); // change state to IDLE DemoState = IDLE;

14. Implementation Data Code Sizes E-Field - Sine Table 4 KB - Recorded Sample 24 KB - Main file 17 KB Microphone - Main file 18 KB Bit Stream sizes E-Field 11.7 KB Microphone 6.8 KB

15. Merging E-Field & Microphone Code Maximize functionality of board Not fully functional due to limitation of the on-chip RAM Combined code & bit stream sizes: -Main file 21 KB -18.6 KB

16. Conclusion Not able to successfully combine E-Field & Microphone code to maximize functionality Implemented an new message into playback table for the E-field “Alert” Improved consistency of E-Field proximity detection Corrected and optimized the microphone code

17. Q & A