ECE 477 Design Review Team 5  Spring 2010 Fred Grandlienard Andrew Gregor Kevin Mohr Ryan DeFord

Outline Project overview Project-specific success criteria Block diagram Component selection rationale Packaging design Schematic and theory of operation PCB layout Software design/development status Project completion timeline Questions / discussion

GloveFX Overview Two gloves equipped with sensors Sensors monitor hand and finger motions Gloves send sensor data wirelessly to hub Hub uses data to play audio sample and add effects to the samples in real time Hub has inputs to set samples on each finger Hub outputs audio through headphone jack

Project-Specific Success Criteria 1. 1.An ability to correctly transmit data wirelessly from gloves to base station An ability to determine the absolute orientation of a user's hand using an accelerometer An ability to load sound files from an SD card and convert them into an analog output signal An ability to use digital signal processing to apply effects (such as reverb, delay, and distortion) to an audio signal An ability to determine the intensity of a user’s finger presses.

Block Diagram Gloves

Block Diagram Main hub

Component Selection Rationale microcontroller dsPIC dsPIC30F4013 Blackfin ADSP-BF512F SHARC ADSP Voltage V3.2 V Clock Speed40 MHz400 MHz200 MHz Ram2 KB116 KB2 Mb Fixed/FloatingFixed Floating Packaging18/SOIC176 ld LQFP144 ld LQFP Cost$6.12$25.49$20.46 Operating Power XXX~100 mW~600 mW

Component Selection Rationale battery Compact size Sufficient life Safe Low cost Our choice: 3.7 V, 750 mAh Li-Ion polymer for a minimum of one hour per charge

Component Selection Rationale wireless Compact size Reliable communication Ease of implementation Low power Low cost Our choice: XBee with 100 m range, 45 mA current draw during Tx

Packaging Design – Hub

Packaging Design - Gloves

Schematic (Power)

Schematic (Right Glove)

Schematic (Left Glove)

Schematic (SHARC DSP)

Schematic (Audio Output)

Schematic (Hub Power)

Schematic (Hub Memory)

PCB Layout (SHARC)

PCB Layout (Right Glove) 3.19 in 2.44 in 1.61 in 1.14 in

PCB Layout (Left Glove) 3.19 in 2.44 in 1.61 in 1.14 in

Software Design Overall operation of gloves in a main loop Most peripherals interface with SPI – –Flash memory – –SD Card D/A interface with I 2 S Serial

Software Design Inputs:Keypad for sample selection Rotary switch for finger mapping Sensor data from gloves Outputs:LEDs for system status Processed digital audio data Sample Selections

Software Design S1S3S5S4 S2 Buffered Samples A1A2A3A4A5 Amplitude Registers FX1FX2FX3FX4FX5 Effects Processing Algorithms Drive R&L channel through digital audio interface

Software Development Status Completed: – –Accelerometer calculation – –Wireless communication Tasks to complete: – –DSP Algorithms

Project Completion Timeline 10 March - Power circuitry for gloves 12 March - Completed PCB designs 26 March - Audio output circuitry 30 March - Read audio samples from SD Card 2 April - Output audio from SD Card 9 April - Decode wireless data from gloves 16 April - Modulate audio samples 28 April - All PSSCs implemented

? Questions?