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I'm Tomu

tomu.im

Fitting an ARM microprocessor in your USB port...

j.mp/tomu-lca19

tomu.im

2 of 44

tomu.im

I'm Tim

I have too many projects!

j.mp/timtoomany-riscv�(New Nov 2018 version!)

j.mp/tomu-lca19

tomu.im

3 of 44

I'm have�a LOT

of projects

​

tomu.im

I'm Tim

I have too many projects!

j.mp/timtoomany-riscv�(New Nov 2018 version!)

j.mp/tomu-lca19

tomu.im

4 of 44

So sometimes do smaller projects

This is the �story of one...

tomu.im

I'm Tim

I have too many projects!

j.mp/timtoomany-riscv�(New Nov 2018 version!)

j.mp/tomu-lca19

tomu.im

5 of 44

  • Minimal parts

​

  • Little processor

​

  • Literally has �<$10 USD in parts

​

  • Closed source

tomu.im

j.mp/tomu-lca19

tomu.im

6 of 44

Silicon Labs - Happy Gecko

  • 25MHz ARM M0+
  • 8kb^ RAM
  • 64kb^ Flash
  • USB 2.0
  • Regulator

^kilobytes

j.mp/tomu-lca19

tomu.im

7 of 44

Silicon Labs - Happy Gecko

~$2.15 USD�on Digikey in individual quantities

j.mp/tomu-lca19

tomu.im

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Created a schematic

j.mp/tomu-lca19

tomu.im

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Created PCB

Rules

  • 2 layer
  • 6mil traces
  • 6mil clearance
  • 0.3mm drill
  • 0.6mm vias
  • 0.8mm PCB

j.mp/tomu-lca19

tomu.im

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Put one together by hand!

j.mp/tomu-lca19

tomu.im

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The hardware works!

j.mp/tomu-lca19

tomu.im

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Hardware!

  • <$10 USD in parts�individual quantities
  • Fits inside USB port
  • Hand solderable
  • Makeable by hobbyists

tomu.im

j.mp/tomu-lca19

tomu.im

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Hardware!

Tested with:

  • DirtyPCB
  • SeedStudios
  • OSH Park

Very�makeable by hobbyists

tomu.im

j.mp/tomu-lca19

tomu.im

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The elephant?

j.mp/tomu-lca19

tomu.im

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The soft elephant?

j.mp/tomu-lca19

tomu.im

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The soft elephant?

Still need U2F firmware

j.mp/tomu-lca19

tomu.im

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The soft elephant?

Still need U2F firmware

smaller projects

j.mp/tomu-lca19

tomu.im

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Open Hardware Certified

​

​

​

AU000001

tomu.im

I'm Tomu

https://tomu.im

​

Send pull request →

Get hardware!

An MCU inside a USB port

j.mp/tomu-lca19

tomu.im

19 of 44

I made 100, then 100 more!

j.mp/tomu-lca19

tomu.im

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The soft elephant?

U2F firmware!

(Thanks Sergei!)

It worked!

j.mp/tomu-lca19

tomu.im

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But I made 100, then 100 more!

j.mp/tomu-lca19

tomu.im

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The soft elephant?

U2F firmware!

(Thanks Sergei!)

It worked well...

j.mp/tomu-lca19

tomu.im

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People

wanted

Tomu!

tomu.im

j.mp/tomu-lca19

tomu.im

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smaller

projects

j.mp/tomu-lca19

tomu.im

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smaller

projects

j.mp/tomu-lca19

tomu.im

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Crowdfunding is not smaller

projects

j.mp/tomu-lca19

tomu.im

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The

sucker…

j.mp/tomu-cs

tomu.im

j.mp/tomu-lca19

tomu.im

28 of 44

​

Partner…

j.mp/tomu-cs

tomu.im

j.mp/tomu-lca19

tomu.im

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Lots of Tomus!

j.mp/tomu-cs

tomu.im

j.mp/tomu-lca19

tomu.im

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But there's more!

j.mp/tomu-lca19

tomu.im

31 of 44

j.mp/tomu-lca19

tomu.im

32 of 44

tomu.im

I'm Tomu

j.mp/fomu-cs

​

Send pull request →

get hardware!

An MCU inside a USB port

j.mp/tomu-lca19

tomu.im

33 of 44

Tomu FPGA

  • Lattice iCE40UP5K
  • 5k LUTs + DSP tiles
  • 128kb^ RAM
  • 1024kb^ Flash (QIO, XIP)

​

  • 1 x RGB LED
  • 2 x touch buttons�
  • Still fits inside your USB port
  • Not hand solderable

^kilobytes

tomu.im

I'm Tomu

j.mp/fomu-cs

​

Send pull request →

get hardware!

An MCU inside a USB port

j.mp/tomu-lca19

tomu.im

34 of 44

Tomu FPGA

​

Luke Valenty�TinyFPGA.com�Prototyping

Sean 'xobs' Cross�Kosagi�Campaign�Production

tomu.im

I'm Tomu

j.mp/fomu-cs

​

Send pull request →

get hardware!

An MCU inside a USB port

j.mp/tomu-lca19

tomu.im

35 of 44

Tomu FPGA

​

tomu.im

I'm Tomu

j.mp/fomu-cs

​

Send pull request →

get hardware!

An MCU inside a USB port

j.mp/tomu-lca19

tomu.im

36 of 44

The hardware works!

Tomu FPGA

​

tomu.im

I'm Tomu

j.mp/fomu-cs

​

Send pull request →

get hardware!

An MCU inside a USB port

j.mp/tomu-lca19

tomu.im

37 of 44

Tomu FPGA

  • Lattice iCE40UP5K
  • 5k LUTs + DSP tiles
  • 128kb^ RAM
  • 1024kb^ Flash (QIO, XIP)

​

  • 1 x RGB LED
  • 2 x touch buttons�
  • Still fits inside your USB port
  • Not hand solderable

^kilobytes

tomu.im

I'm Tomu

j.mp/fomu-cs

​

Send pull request →

get hardware!

An MCU inside a USB port

j.mp/tomu-lca19

tomu.im

38 of 44

Tomu FPGA

​

�

CPU SoC�~3.5K LUTs

​

Leaving ~30%!

5K LUTs? DSP tiles?

tomu.im

I'm Tomu

j.mp/fomu-cs

​

Send pull request →

get hardware!

An MCU inside a USB port

j.mp/tomu-lca19

tomu.im

39 of 44

Tomu FPGA

​

Tools

Could use it just as �

​

  • Development toolchain;
    • (upstream) GCC
    • Bare Metal C
    • Zephyr RTOS
    • (maybe?) UF2 + DFU

CPU!

tomu.im

I'm Tomu

j.mp/fomu-cs

​

Send pull request →

get hardware!

An MCU inside a USB port

j.mp/tomu-lca19

tomu.im

40 of 44

Tomu FPGA

​

Tools

Soft CPU Contest

Lattice iCE40UP5K

Make CPU smaller!

tomu.im

I'm Tomu

j.mp/fomu-cs

​

Send pull request →

get hardware!

An MCU inside a USB port

j.mp/tomu-lca19

tomu.im

41 of 44

Tomu FPGA

​

Tools

​

​

Fully

open source

toolchain

�Verilog → Bitstream

Lattice iCE40UP5K

tomu.im

I'm Tomu

j.mp/fomu-cs

​

Send pull request →

get hardware!

An MCU inside a USB port

j.mp/tomu-lca19

tomu.im

42 of 44

Tomu FPGA

​

Tools

​

LiteX BuildEnv�support!

j.mp/lxbe-wiki

Lattice iCE40UP5K

tomu.im

I'm Tomu

j.mp/fomu-cs

​

Send pull request →

get hardware!

An MCU inside a USB port

j.mp/tomu-lca19

tomu.im

43 of 44

Tomu FPGA

​

Tools

FµPy support!

fupy.github.io

Lattice iCE40UP5K

tomu.im

I'm Tomu

j.mp/fomu-cs

​

Send pull request →

get hardware!

An MCU inside a USB port

j.mp/tomu-lca19

tomu.im

44 of 44

Tomu FPGA

Tomu

j.mp/tomu-lca19

tomu.im