Frequently Asked Questions (FAQ)#

How to switch between LCD and HDMI display?#

Switch to LCD display#

# 以 01studio 开发板为例
cd /boot
rm -f k.dtb
ln -s k230-canmv-01studio-lcd.dtb k.dtb
sync
reboot

Switch to HDMI display#

# 以 01studio 开发板为例
cd /boot
rm -f k.dtb
ln -s k230-canmv-01studio.dtb k.dtb
sync
reboot

View current display configuration#

# 查看 k.dtb 的软链接目标
ls -lh /boot/k.dtb

# 输出示例：
# lrwxrwxrwx 1 root root 23 Apr 17 10:10 /boot/k.dtb -> k230-canmv-01studio.dtb

# 判断规则：
# - 链接名称包含 "lcd" → 当前使用 LCD 显示
# - 链接名称不包含 "lcd" → 当前使用 HDMI 显示

How to Connect to WiFi?#

Method 1: Configure via Environment Variables#

fw_setenv wlanssid H3C_wjx
fw_setenv wlanpass 12345678
reboot

Method 2: Use the sta.sh Script#

sta.sh wlan0 H3C_wjx 12345678

How to Switch Camera Channels (CSI0/CSI1/CSI2)?#

K230 Linux SDK currently only supports single camera mode. To switch between different camera channels, please refer to: K230 Camera Channel Switching Instructions

How to Enable the GDB Debugger?#

Enable via MenuConfig:

make menuconfig
# 路径：Target packages → Debugging, profiling and benchmark → gdb → full debugger

Or directly modify the configuration file:

BR2_PACKAGE_GDB=y
BR2_PACKAGE_GDB_DEBUGGER=y

How to Quickly Update the Kernel and Device Tree?#

Directly replace the relevant files in the /boot directory:

ls -lh /boot/
# 输出说明：
# Image                          # 内核镜像
# fw_jump_add_uboot_head.bin     # U-Boot 启动镜像
# k.dtb                          # 设备树符号链接
# k230-canmv-*.dtb               # 具体的设备树文件
# nuttx-*.bin                    # NuttX 固件

How to Verify DDR Memory Stability?#

Run the following commands to generate DDR test images:

make ddr_test_img_128    # 128MB DDR 测试镜像
make ddr_test_img_512    # 512MB DDR 测试镜像
make ddr_test_img_1024   # 1024MB DDR 测试镜像
make ddr_test_img_2048   # 2048MB DDR 测试镜像

The generated images will automatically run the DDR stability test program (running continuously). During the test, the serial port will continuously output relevant information; if the test fails, the serial port will print error messages.

What Hardware Does the SDK Currently Support?#

Development Board	CPU	Configuration File	Notes
Banana Pi	k230d	BPI-CanMV-K230D-Zero_defconfig	64-bit
Banana Pi	k230d	BPI-CanMV-K230D-Zero_ilp32_defconfig	32-bit
k230d_canmv	k230d	k230d_canmv_defconfig	64-bit
01studio	k230	k230_canmv_01studio_defconfig
Dongshan Pi	k230	k230_canmv_dongshanpi_defconfig
JLCPCB	k230	k230_canmv_lckfb_defconfig
ChuangLebo	k230	k230_canmv_v3_defconfig
canmv1.0/1.1	k230	k230_canmv_defconfig
evb	k230	k230_evb_defconfig	lpddr3

What LCD Screens Does the Linux SDK Support?#

Driver Chip	Resolution	Applicable Development Boards
ST7701	480×640	01studio
ST7701	480×800	JLCPCB / 01studio / ChuangLebo
ILI9806	480×800	Dongshan Pi
HX8399	1080×1920	EVB

What Camera Modules Does the K230 Linux SDK Support?#

Model	Pixels	Notes
GC2093	2MP
OV5647	5MP
IMX335	5MP