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FEST. ECE 477 Fall 2011 TEAM 5 Gloria Budiman Alexander Kidarsa Christopher Sakalis Vishal Gala. fEST. Far End Speakerphone Test System. Introduction. Design constraint . Telephone line, ~300-3400 Hz By Nyquist Rate, 8000Hz 16-bit data depth per channel

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FEST

ECE 477 Fall 2011

TEAM 5

Gloria Budiman

Alexander Kidarsa

Christopher Sakalis

Vishal Gala


fEST

  • Far

  • End

  • Speakerphone

  • Test

  • System



Design constraint
Design constraint

  • Telephone line, ~300-3400 Hz

  • By Nyquist Rate, 8000Hz

  • 16-bit data depth per channel

  • Requires to playback and record four different audio files

  • MCU has only one storage media

  • Large, fast-access internal memory needed


Computation requirement
Computation requirement

  • FFT

  • Normalized LMS

  • Auto-correlation


Interface requirement
Interface requirement

  • SD card

  • USB*

  • 2 Push Buttons

    • Reset

    • Start/Stop

  • 2 Switch

  • LCD/7-Segment-Display

  • LED


On chip off chip
On-chip & Off-chip

  • On-Chip

    • Serial Peripheral Interface

    • SD Card

    • USB*

  • Off-Chip

    • DAC - To playback audio data from MCU

    • ADC - To record audio data to the MCU


Power packaging cost
Power, packaging & Cost

  • A.C. powered

    • Back up battery necessary for 24-hour operation

  • Packaging

    • Portable

    • But handheld form factor not desired

  • Unique device


Component selection
Component selection

  • TMS320F-28035 MCU

    • Lower pin count, 128KB on-chip Flash

    • Other Options

      • TMS320F-28335 (same family, 100+ pins, 256KB on-chip Flash)

      • C5000 low-power MCU (500+ pins)

      • C6000 single-core DSP (700+ pins, BGA only)

  • TLV320AIC23 Audio Codec

    • Modularity

    • Extendibility

    • Other Options

      • PCM3008 (low-end, non-configurable)

      • TLV320AIC320, PCM3070 (non-hand-solderable)



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