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b3ce35900c
Add description of compiling u-boot for K230 CanMV. Since the vendor's u-boot-spl verifies u-boot header [1], it is necessary to use the Python script from vendor to add the header to the u-boot image. [1] https://github.com/kendryte/k230_sdk/blob/v1.8/src/little/uboot/board/canaan/common/k230_board_common.h#L52 Signed-off-by: Junhui Liu <junhui.liu@pigmoral.tech> Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
89 lines
2.2 KiB
ReStructuredText
89 lines
2.2 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0+
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K230 CanMV
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==========
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K230 RISC-V SoC
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------------------
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The K230 chip is the latest generation SoC product in Canaan Technology's
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Kendryte series of AIOT chips.
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Mainline support
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----------------
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The support for following drivers are already enabled:
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1. ns16550 UART
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2. DWC2 OTG USB controller
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Building
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~~~~~~~~
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1. Get the RISC-V toolchain.
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2. Setup cross compilation environment variable:
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3. Get the `firmware_gen.py`_ from vendor.
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.. code-block:: console
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export CROSS_COMPILE=riscv64-linux-gnu-
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cd <U-Boot-dir>
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make k230_canmv_defconfig
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make
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cp u-boot-gz.img u-boot-gz.img.tmp
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pip install gmssl pycryptodome
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python3 firmware_gen.py -i u-boot-gz.img.tmp -o u-boot-head.img -n
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This will generate u-boot-head.img.
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.. _firmware_gen.py: https://raw.githubusercontent.com/kendryte/k230_sdk/refs/tags/v1.8/src/little/uboot/tools/firmware_gen.py
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Booting
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~~~~~~~
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Currently, we rely on vendor u-boot-spl to initialize the
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ddr and load the u-boot image, then bootup from it.
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1. Prepare a SD card with the `vendor image`_ burned on it.
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2. Write the U-Boot image to the SD card at offset 2MB.
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.. code-block:: console
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dd if=u-boot-head.img of=/dev/sd[x] bs=1M seek=2
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3. Insert the SD card into the board and power it on.
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.. _vendor image: https://kendryte-download.canaan-creative.com/developer/k230/CanMV-K230_debian_sdcard_sdk_1.3.img.gz
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Sample boot log from K230 CanMV board
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.. code-block:: none
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U-Boot 2025.01-00645-g2d81c4788455 (Jan 14 2025 - 23:15:07 +0800)
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DRAM: 512 MiB
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Core: 15 devices, 11 uclasses, devicetree: separate
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Loading Environment from nowhere... OK
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In: serial@91400000
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Out: serial@91400000
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Err: serial@91400000
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Net: No ethernet found.
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K230# cpu list
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0: cpu@0 thead,c908
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K230# usb start
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starting USB...
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Bus usb@91540000: USB DWC2
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scanning bus usb@91540000 for devices...
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Warning: r8152_eth (eth0) using random MAC address - 1e:33:97:47:e6:32
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2 USB Device(s) found
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K230# usb tree
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USB device tree:
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1 Hub (480 Mb/s, 0mA)
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| U-Boot Root Hub
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+-2 Vendor specific (480 Mb/s, 100mA)
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Realtek USB 10/100 LAN 000000000000
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K230#
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