How to download SDK ？
git clone git@github.com:senarytech/ubuntu.git --recursive
How to compile ？
Get the toolchain and put it to ubuntu dir
Prepare the docker environment,
Firstly unzip sysroot/sysroot.tar.bz2 under ubuntu dir,
then please read custbuild/buildenv/readme
after build docker environment,you can enter custbuild dir
./build_evk.sh,
Burn the Image
ater build success, you can get image from out/vs680_a0_ubuntu20_evk/target/release/eMMCimg/