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ProSpeckz III Design and Implementation

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Single quarter-credit-card. sized board. Cypress CY8C2764 PSoC: 8-bit. 12MHz microcontroller with ... 2MB additional SRAM and SecureDigital card interface. ... – PowerPoint PPT presentation

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Title: ProSpeckz III Design and Implementation


1
ProSpeckz III Design and Implementation
  • Martin Ling Steven Wong
  • University of Edinburgh
  • m.j.ling_at_ed.ac.uk / k.j.wong_at_sms.ed.ac.uk

2
Overview
  • Introduction
  • Brief review of ProSpeckz II
  • Applications demonstrators developed
  • Requirements for ProSpeckz III
  • Design approach final design
  • Status future work
  • Questions

3
ProSpeckz II - Specifications
  • Single quarter-credit-cardsized board.
  • Cypress CY8C2764 PSoC 8-bit12MHz
    microcontroller with256 bytes RAM, 16K Flash,12
    analogue and 8 digitalprogrammable peripheral
    blocks.
  • Chipcon CC2420 2.4GHz, IEEE 802.15.4 RF
    transceiver, providing 250kbps data rate with
    programmable power output, 16 available channels.
  • Runs from 3V lithium button cell or 3.6V Varta
    Mempac, with power consumption between 300?A
    (deep sleep) and 24.5mA (PSoC active radio
    receiving).

4
ProSpeckz II Benefits
  • Facilitates application demonstrations and
    feasibility studies.
  • Provides a physical testbed for radio MAC and
    network layer protocols.
  • Helps to give estimates of performance,
    requirements and restrictions for Specks.
  • Easily extensible by plugging in sensors,
    actuators and other additional hardware.

5
ProSpeckz II Existing Applications
  • Distributed fire safety system
  • Proximity-aware speaking objects/toys
  • Museum visitor movement and interaction tracking
  • Autonomous control of small vehicles
  • Relative position detection in 2D plane
  • Smart Jewellery

6
ProSpeckz II Video Demonstrations
  • (Video)

7
ProSpeckz II - Problems
  • Very limited resources.
  • Memory even smaller than is likely on a Speck.
  • Awkward to develop applications.
  • Unfamiliar programming environment.
  • Difficult for potential users to experiment with.
  • Results not directly relevant for real Specks.
  • Not an architecture development platform.
  • Time for something new

8
ProSpeckz III - Requirements
  • A platform to prototype applications quickly and
    easily, and evaluate their hardware requirements.
  • Generous CPU memory resources.
  • Support familiar programming environments (Java,
    C).
  • Ideally able to run a basic OS (e.g. TinyOS,
    eCos, uClinux).
  • Small, rugged, low-power design in suitable
    packaging.
  • A platform to develop the architecture of a real
    Speck.
  • FPGA for testing CPU and baseband designs.
  • Easy swap-in of alternative RF circuits.
  • Flexible, extensible and runtime-programmable.
  • Should be able to combine any combination of
    software/hardware components.
  • Low cost, and available quickly.

9
ProSpeckz III Design Approach
  • Split system into multiple boards.
  • Minimise size, cost and power consumption for
    each application.
  • Develop independently and limit cost of
    redesigns.
  • Re-use elements of ProSpeckz II design.
  • Faster development.
  • Backwards compatibility.
  • Use flexible components, and keep them flexible.
  • Provide plentiful interconnection expansion.
  • Leave details to be set in software.

10
ProSpeckz III Stackable Design
  • ProSpeckz III Components
  • Sensor board Cypress CY8C2764 PSoC, sensors for
    light/sound/temperature and expansion ports.
  • Radio board Chipcon CC2420 2.4GHz IEEE 802.15.4
    RF transceiver and antenna.
  • CPU board 60MHz Atmel AT91 with ARM7TDMI core,
    256KB on-board SRAM and 2MB Flash.
  • Memory board 2MB additional SRAM and
    SecureDigital card interface.
  • FPGA board Xilinx XC3S200 Spartan-III (200k
    gates), with 8-bit ADC/DAC and daughterboard
    connection for prototype RF circuits.
  • Power board (not shown) provides 3V and 1.8V
    supplies from one or two 3V lithium button cells
    or 3.6V Varta Mempac, or runs and charges from
    external DC power.

11
ProSpeckz III Usage
  • For developing applications
  • Develop for JVM, ARM7, Cypress PSoC, FPGA-hosted
    processor, or any combination.
  • Test in numbers with minimum required hardware.
  • Transfer step by step to FPGA-hosted Speck
    prototype.
  • For developing Speck CPU baseband
  • Replace components one by one with FPGA-hosted
    equivalents.
  • Final VHDL specifies final ASIC design.
  • For developing Speck RF systems
  • Connect directly to analogue interface on FPGA
    board to communicate with baseband layer.

12
ProSpeckz III Status
  • Most components now ready, with assembled CPU
    boards due in 1-2 weeks.
  • Completed peripheral boards are being tested on
    an AT91 development system, and drivers written.
  • Documentation and development tools to follow the
    first complete system.
  • Prospective application developers can be given
    some starting points now.

13
Questions
  • Any questions?
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