cubieboard2 software and develop guide of cubieboard2 Version Link develop guide https://github.com/codeshredder/cubieboard2/blob/master/DevelopGuide.rst u-boot https://github.com/codeshredder/cubieboard2/blob/master/u-boot-sunxi.tar.bz2 kernel sunxi-tool https://github.com/codeshredder/cubieboard2/blob/master/sunxi-tools.tar.bz2