Create an FPGA reference design

[mwelling]

Create an FPGA design.

Probably best to use an FPGA with open source toolchain. ice40, ecp5...

[mwelling]

https://github.com/butterstick-fpga/butterstick-hardware
https://github.com/orangecrab-fpga/orangecrab-hardware
https://github.com/ulx3s/ulx3s
https://github.com/mattvenn/basic-ecp5-pcb

esp32-s3
stm32

try to keep the ice-v wireless formfactor.
3x PMOD
USB C
lipo battery management,

[mwelling]

https://github.com/cheyao/icepi-zero
https://github.com/mwelling/icecrusher