1FriendlyARM NANOPI-M4 2===================== 3 4Build: 5 6 $ make friendlyarm_nanopi_m4_defconfig 7 $ make 8 9Files created in output directory 10================================= 11 12output/images 13 14├── bl31.elf 15├── boot.vfat 16├── extlinux 17├── idbloader.img 18├── Image 19├── rk3399-nanopi-m4.dtb 20├── rootfs.ext2 21├── rootfs.ext4 -> rootfs.ext2 22├── rootfs.tar 23├── sdcard.img 24├── u-boot.bin 25└── u-boot.itb 26 27Creating bootable SD card: 28========================== 29 30Simply invoke (as root) 31 32sudo dd if=output/images/sdcard.img of=/dev/sdX && sync 33 34Where X is your SD card device 35 36Serial console 37-------------- 38 39Baudrate for this board is 1500000 40 41Login: 42------ 43Enter 'root' as login user, and the prompt is ready. 44 45https://wiki.amarulasolutions.com/bsp/rockchip/rk3399/nanopi_m4.html 46