98 lines
2.6 KiB
Plaintext
98 lines
2.6 KiB
Plaintext
Intro
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=====
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This directory contains a Buildroot configuration for building a
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LicheePi 4A image. For more information, see the board wiki page [1].
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How to build it
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===============
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Configure Buildroot
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-------------------
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make sipeed_licheepi_4a_defconfig
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Build the boot and rootfs
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-------------------------
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Note: you will need to have access to the network, since Buildroot
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will download the packages' sources.
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You may now build your rootfs with:
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make
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(This may take a while, consider getting yourself a coffee ;-) )
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Result of the build
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-------------------
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After building, you should obtain this tree:
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output/images/
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+-- boot.ext4
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+-- rootfs.ext2
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+-- rootfs.ext4 -> rootfs.ext2
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+-- rootfs.tar
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+-- u-boot.bin
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+-- u-boot-with-spl.bin
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+-- fw_dynamic.bin
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`-- Image
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How to flash the board
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======================
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Once the build process is finished you will have to flash the
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correspoding images to the respective partitions in the eMMC.
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LicheePi 4A uses fastboot to flash the images.
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The board needs to be booted in "Burning Mode". For that, check first
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the boot switches (SW1, SW2) on the base board are set up on the
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"eMMC" mode (this is the factory default). Then, boot the board while
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pressing the "BOOT" button. See [2].
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Note that the board can be booted by either:
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- attaching the USB-C power cable, or
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- pressing the "RESET" button (near the USB-C power connector) if the
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power cable is already connected to the host computer.
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The board should be enumerated from the host computer. This can be
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confirmed with "lsusb". The board should be listed as:
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ID 2345:7654 T-HEAD USB download gadget
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The device should also be listed by the "fastboot devices" command:
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???????????? Android Fastboot
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The board can be flashed with the commands:
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fastboot flash ram output/images/u-boot-with-spl.bin
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fastboot reboot
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fastboot flash uboot output/images/u-boot-with-spl.bin
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fastboot flash boot output/images/boot.ext4
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fastboot flash root output/images/rootfs.ext2
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Boot the board
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==============
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Connect the console on the System Serial Port on pins
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U0-RX, U0-TX and GND. For more details, see [3].
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When resetting or powering up the board on the USB-C port, the U-Boot
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prompt and Linux console will appear on this System Serial Port.
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References
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==========
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[1] https://wiki.sipeed.com/hardware/en/lichee/th1520/lpi4a/1_intro.html
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[2] https://wiki.sipeed.com/hardware/en/lichee/th1520/lpi4a/4_burn_image.html#How-to-enter-burning-mode
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[3] https://wiki.sipeed.com/hardware/en/lichee/th1520/lpi4a/6_peripheral.html#System-Serial-Port
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