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64 lines
1.9 KiB
Plaintext
64 lines
1.9 KiB
Plaintext
= PinePhone “BraveHeart”
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include::_support/common.inc[]
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== Device-specific notes
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=== Building a full disk image
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This platform uses the `u-boot` system-type. This means that a full disk image
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can be produced, and this full disk image flashed _outright_ to the block
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device. That block device can be the internal eMMC or the SD card.
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The PinePhone will boot from SD card if a bootloader can be found. This means
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that the full disk image can be flashed to an SD card, and it will prioritise
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booting it.
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```
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$ nix-build --argstr device pine64-pinephone-braveheart -A build.disk-image
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$ dd if=result of=/dev/mmcblkX bs=8M oflag=sync,direct status=progress
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```
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=== Building the boot partition
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Building the full disk image may require a native AArch64 system.
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The boot partition can be built, and then flashed on top of an existing Mobile
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NixOS boot partition.
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```
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$ nix-build --argstr device pine64-pinephone-braveheart -A build.boot-partition
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$ dd if=result/mobile-nixos-boot.img of=/dev/mmcblkXp1 bs=8M oflag=sync,direct status=progress
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```
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=== Building U-Boot
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Flashing the boot partition will not affect the installed U-Boot bootloader.
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U-Boot can be built and then flashed the usual way for Allwinner platforms.
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```
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$ nix-build --argstr device pine64-pinephone-braveheart -A build.u-boot
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$ dd if=result/u-boot-sunxi-with-spl.bin of=/dev/mmcblkX bs=1024 seek=8
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```
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=== Usage notes
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==== LED
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In the default setup, the LED has been configured to show status information.
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Its colour or pattern can be used to infer the status.
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During boot:
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* Red as early as possible in our U-Boot build
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* Yellow when our U-Boot "boot script" ran
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* Green by the kernel whenever it sets it up
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At any time:
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* The red LED will flash on panic
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As it does not reset the other LED colours, it may flash green/yellow rather
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than off/red. If applications customize the LED status, it may flash in other
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patterns involving red.
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