47 lines
1.5 KiB
Plaintext
47 lines
1.5 KiB
Plaintext
# Setup build envoronment
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https://source.android.com/setup/build/initializing
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$ sudo apt install libssl-dev python3-setuptools
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# Download Android source
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https://github.com/android-rpi/local_manifests
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# Patch the source
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https://github.com/android-rpi/device_arpi_rpi4/wiki/arpi-13-:-framework-patch
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# Build Android
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Refer to http://source.android.com/source/building.html
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$ source build/envsetup.sh
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$ lunch rpi4_car-eng
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$ make ramdisk systemimage vendorimage
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Use -j[n] option with make, if build host has a good number of CPU cores.
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# Prepare sd card
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Partitions of the card should be set-up like followings.
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p1 128MB for boot : Do fdisk, set W95 FAT32(LBA) & Bootable type, mkfs.vfat
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p2 2048MB for /system : Do fdisk, new primary partition
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p3 128MB for /vendor : Do fdisk, new primary partition
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p4 remainings for /data : Do fdisk, mkfs.ext4
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Set volume label of /data partition as userdata
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: use -L option for mkfs.ext4
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# Write system & vendor partition
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$ cd out/target/product/rpi4
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$ sudo dd if=system.img of=/dev/<p2> bs=1M
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$ sudo dd if=vendor.img of=/dev/<p3> bs=1M
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# Copy firmware & ramdisk to boot partition
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device/snappautomotive/rpi4/boot/* to p1:/
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out/target/product/rpi4/ramdisk.img to p1:/
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# Download & Build kernel source
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https://github.com/android-rpi/kernel_manifest
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# Copy kernel binaries to boot partition
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<kernel directory>/out/arpi-5.10/dist/Image.gz to p1:/
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<kernel directory>/out/arpi-5.10/dist/bcm2711-rpi-*.dtb to p1:/
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<kernel directory>/out/arpi-5.10/dist/vc4-kms-v3d-pi4.dtbo to p1:/overlays/
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