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65 lines
1.7 KiB
Markdown
65 lines
1.7 KiB
Markdown
# How uConsole CM4 OS Image Is Made
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This guide explains how to create an OS image for the uConsole CM4 module.
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---
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# uConsole_CM4_v2.0_64bit.img.7z
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Since v2.0, cm4 os image is made by [pi-gen](https://github.com/cuu/pi-gen/tree/uconsole_arm64)
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just clone [pi-gen](https://github.com/cuu/pi-gen/tree/uconsole_arm64) repo, branch uconsole_arm64
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run `sudo ./build.sh` in ubuntu linux PC
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- kernel source: https://github.com/cuu/ClockworkPi-linux/commit/9a1e3adc9d1431889f62e633ae791bfc9a6cf535
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here is kernel compiling commands:
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```
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export KERNEL=kernel8
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export ARCH=arm64
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export CROSS_COMPILE=aarch64-linux-gnu-
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make bcm2711_defconfig
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make -j4
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mkdir -p ../modules
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rm -rf ../modules/*
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INSTALL_MOD_PATH=../modules make modules_install
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mkdir -p ../firmware
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rm -rf ../firmware/*
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mkdir -p ../firmware/overlays
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cp arch/arm64/boot/Image ../firmware/$KERNEL.img
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cp arch/arm64/boot/dts/broadcom/*.dtb ../firmware
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cp arch/arm64/boot/dts/overlays/*.dtb* ../firmware/overlays/
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cp arch/arm64/boot/dts/overlays/README ../firmware/overlays/
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KERNEL_VER=$(make kernelrelease)
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cp arch/arm64/boot/Image.gz ../vmlinuz-${KERNEL_VER}
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cp System.map ../System.map-${KERNEL_VER}
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cp .config ../config-${KERNEL_VER}
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mkdir -p ../linux-headers-${KERNEL_VER}
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make headers_install INSTALL_HDR_PATH=../linux-headers-${KERNEL_VER}
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```
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- In pi-gen , we added some modifcations:
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1. Pull up gpio9 at boot,so that screen will turn on right away when Power on
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2. Set default lcd backlight to 3
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3. Set default desktop to be large screen
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4. No wallpaper, only black color
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5. Fn+<> to adjust lcd backlight
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- All official uConsole OS images can be found here:
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[uConsole Images Repository](https://github.com/clockworkpi/uConsole/tree/master/images)
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- Happy hacking!
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