How to build image

What to expect

Build of a custom Linux distribution from source (e.g. Gentoo install).
The procedure takes several hours to complete.
The RAM usage will be as high as 4GiB per each core of your CPU.
The build will take around 32GiB of your storage.

Requirements

The requirements for the build are listed in a Dockerfile located in the root of this repository. Docker image build using the Dockerfiles is used for CI build.

Clone the respoitory

git clone git@github.com:prusa3d/Prusa-Firmware-SL1.git
git tag -a -m "My custom build" my_custom_build
git submodule init
git submodule update

Obtain keys for image signing

cd keys
sh gen_certs.sh # Skip this if you already have the keys
sh deploy_certs.sh
cd ..

Build development SD image

source ./oe-init-build-env
bitbake sla-dev-image # other targets are sla-update-bundle, sla-bootstrap

Write the image to the SD card

With bmaptool

bmaptool copy tmp/deploy/images/prusa64-sl1/sla-dev-image-prusa64-sl1.wic /dev/mmcblkXXX
With dd

dd if=tmp/deploy/images/prusa64-sl1/sla-dev-image-prusa64-sl1.wic of=/dev/mmcblkXXX bs=1M

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Other targets

sla-dev-image: development-enabled μSD image
sla-bootstrap: μSD image for eMMC bring-up
sla-update-bundle: OTA & offline update package

SDK (cross-toolchain)

A matching (e)SDK installer can be produced alongside an image by adding {+ -c populate_sdk +} or {+ -c populate_sdk_ext +} to the bitbake [target] command.

r21m/Prusa-Firmware-SL1