cmake --build build -j$(nproc)sudo build/_deps/picotool-build-usb/picotool load build/rp2040_watch.uf2 -fsudo apt install libusb-1.0-0-dev
export PICO_SDK_PATH=$HOME/pico/pico-sdk
cmake -B build -G Ninja -DCMAKE_EXPORT_COMPILE_COMMANDS=ON
cmake --build build -j$(nproc)
cmake -B build/_deps/picotool-build-usb -S build/_deps/picotool-src -DPICO_SDK_PATH=$HOME/pico/pico-sdk
cmake --build build/_deps/picotool-build-usb -j$(nproc)Hold BOOTSEL, connect USB, release BOOTSEL. The board mounts as RPI-RP2, then:
cp build/rp2040_watch.uf2 /media/$USER/RPI-RP2/After this, picotool handles flashing over USB — no need to hold any buttons.