Compile BSP

Introduction

BSP is a low-level software development kit between the bottom-level
hardware and the upper-level software. Its main function is to shield
the hardware and provide operating system drivers and hardware
drivers. BSP is used to build system software, such as bootloader,
kernel and file system.

Environment preparation

Compilation host requirements:

OS: Ubuntu 16.04/18.04 or above

Storage: 40G of free disk space

Docker is installed and the development user account has docker
permissions

Download BSP SDK

Download bsp-sdk-binary.tgz from Original SDK

Go to Download Center to download bm1684_build.docker.tar, ec-
a1684jd4_bsp.initial.bundle and ec-a1684jd4_bsp.update.bundle.

Run the following command to complete the initialization of the BSP
SDK:

   # This assumes that all downloaded files are placed in the current directory

   # Install development tools
   sudo apt install bison flex bc rsync kmod cpio sudo uuid-dev cmake libssl-dev fakeroot dpkg-dev device-tree-compiler u-boot-tools

   # Clone the BSP SDK from ec-a1684jd4_bsp.initial.bundle
   git init bm1684-sdk
   cd bm1684-sdk
   git fetch ../ec-a1684jd4_bsp.initial.bundle
   git reset --hard FETCH_HEAD

   # Update to the latest from ec-a1684jd4_bsp.update.bundle
   git fetch ../ec-a1684jd4_bsp.update.bundle
   git merge FETCH_HEAD

   # Unzip the SDK package
   cd bm1684-sdk
   tar xf ../bsp-sdk-binary.tgz

   # Import the Docker build image
   docker load < ../bm1684_build.docker.tar

Update BSP SDK

Go to Download Center to download the latest ec-
a1684jd4_bsp.update.bundle

Run the following command to complete the update of the BSP SDK:

   # This assumes that all downloaded files are placed in the bsp sdk directory

   # Pull the modified commit from the bundle
   git fetch ec-a1684jd4_bsp.update.bundle

   # View modification records
   git log FETCH_HEAD

   # Merge into the current development branch
   git merge FETCH_HEAD

Compile and upgrade firmware

Assuming the current BSP SDK directory, run the following command to
generate the upgrade firmware:

   # After the following command is run, you need to enter the user password to do sudo operations
   ./build.sh build_all

   # The final generated firmware file is: install/soc_bm1684_asic/sdcard.zip