for now requires nightly rust 2021-01-07 to build:

rustup override set nightly-2021-01-07

you can cargo r with an arduino uno connected and it should automatically flash to it

notes for self

1

in Cargo.toml:

# Workaround to fix compiler panics
# Rahix/avr-hal#131
[profile.dev.package.compiler_builtins]
overflow-checks = false

2

can't % with >=32bit integers because of rust-lang/rust#82242

so I guess we just use u16/i16

3

if avrdude can't find the arduino serial port change $SERIAL in uno-runner.sh to either /dev/ttyACM0 or /dev/ttyACM1