This repository includes:

• linux-brain, u-boot-brain and nkbin_maker as submodules
• Useful build targets in Makefile
• r3build.toml to watch changes that occur in submodules

• Debian 10 (buster) amd64

1. Install dependencies.

   $ sudo apt install build-essential bison flex libncurses5-dev gcc-arm-linux-gnueabi
   

2. Clone this repository with recursive clone enabled.

   $ git clone --recursive [email protected]:puhitaku/buildbrain.git
   

   • If you've cloned it without --recursive, run following command:

   $ git submodule update --init --recursive
   

3. Install uuu.

   • Follow the instruction and build uuu executable.
   • Put uuu where the PATH executable points to.

1. Run make udefconfig-sh* to generate .config.

   • For Sx1: make udefconfig-sh1
   • For Sx6: make udefconfig-sh6

2. Run make ubuild to build whole repository and generate u-boot.sb.

   • i.MX283 loads a packed U-Boot executable called u-boot.sb.

3. To inject the executable into i.MX283 in recovery mode, run make uuu.

1. Run make udefconfig to generate .config.

2. Run make ubuild to build whole repository and generate u-boot.bin.

3. To make nk.bin, run make nkbin.

   • nkbin_maker packs u-boot.bin into nk.bin.

1. Run make ldefconfig to generate .config.

2. Run make lbuild to generate zImage.

3. Confirm that linux-brain/arch/arm/boot/zImage exists.

1. Partition an SD card into two partitions.

   • 1st: FAT32 (vfat), about 100MB
   • 2st: ext4, fill the remaining area

2. Build and copy the Linux kernel.

   • Run make ldefconfig lbuild.
   • Copy /linux-brain/arch/arm/boot/zImage and /linux-brain/arch/arm/boot/dts/imx28-evk.dtb into the 1st partition.

3. Run APT cache in background (mandatory): make aptcache.

4. Run make debian.

5. Copy all contents in ./debian into the 2nd partition.

   • sudo cp -ar ./debian/* /path/to/your/sd/2nd/partition/
   • Please make sure that all attributes are preserved with -a flag.

1. Run make setup-dev to prepare a Python venv to watch code changes. Namely;

   • Python 3 venv in env
   • r3build command in the env

2. Run r3build. It'll detect the changes you make and builds the corresponding executable automatically.

r3build is a smart file watcher that aims to provide hot-reloading feature like Web frontend development.