|
|
|
Wendy Ju |
|
Rehmi Post |
|
Matt Reynolds |
|
|
|
|
Educational applications (e-books, CS lessons,
etc) |
|
People need quick access to news, weather, Web,
or digital books |
|
People need peer-to-peer voice or data
connectivity, especially in infrastructure-poor places |
|
|
|
|
Small, cheap |
|
Long battery life |
|
Peer to peer ad-hoc wireless TCP/IP networking |
|
Open software, open hardware |
|
Complete software development environment on
board |
|
Reusable design for embedded computing (to
enable TTT!) |
|
|
|
|
Open hardware and software (no big SW license
fees!) |
|
Simplified backplane bus using 1Mbps SPI for low
cost |
|
On-board power management for long battery life
(50mW while decoding MP3s) |
|
128x64 pixel onboard LCD, possibly VGA or NTSC
output in next version |
|
Projected system cost in volume O($50), easy to
integrate into a cheaper few-chip solution |
|
|
|
|
|
Standards-based (TCP/IP) |
|
Everything peer-to-peer: |
|
Wireless LAN: 900MHz, 1mW, 200Kbps peering or
hub-and-spoke internet gateways |
|
RS-485 wired LAN: 1Mbps multidrop. Ethernet
consumes too much power, Cat-5 cable is too expensive |
|
Easy transition between “connected” or
“detached” modes |
|
|
|
|
Software Footprint: < 1MB!!!! |
|
Web browser, full TCP/IP software suite, NFS,
web server, etc. |
|
Native or cross-compile -- either way a full
software development environment: vi, emacs, C and Scheme |
|
MP3 audio and IP telephony support in hardware |
|
Browse or navigate with onboard buttons and
wheel; write code with external keyboard/mouse |
|
|
|
|
|
|
Cheap embedded controller for tasks bigger than
a PIC can handle |
|
Embedded routers, wireless gateways, data
loggers, process controls, info displays, toasters, thermostats, robotic
pets, … |
|
Everybody owns all software IP through GNU
Public License (hardware is ML licensed) |
|
Design is scalable through Motorola ColdFire
50MIPS solutions or Verilog 68K models |
|
|
|
|
|
Four reusable main modules: |
|
Processor core containing Motorola Dragonball,
8MB flash, 8MB DRAM, running Linux |
|
Mothercard containing audio DSP, 200Kbit/sec
TDMA/FDMA data radio, backplane bus controller, and up to 64MB removable
flash |
|
Removable user interface board |
|
Docking station containing battery charger,
serial port, keyboard port, RS-485 multidrop network |
|
|
|
|
|
|
|
|
|
|
|
|
Quantum Computer Module with Pengachu Interface |
|
(Yael and JasonT) |
|
|
|
|
|
|
http://www.media.mit.edu/~rehmi/freeip.html |
|
|
|
|
2 Month Crash Hardware Development |
|
Trilateral Org Chart with Equal Contributors |
|
Top-down mechanical/electronics integration |
|
Use of rapid prototyping as appropriate |
|
Notes