FriendlyARM NANOPC-T4 ===================== Build: $ make friendlyarm_nanopc_t4_defconfig $ make Files created in output directory ================================= output/images ├── bl31.elf ├── boot.vfat ├── extlinux ├── idbloader.img ├── Image ├── rk3399-nanopc-t4.dtb ├── rootfs.ext2 ├── rootfs.ext4 -> rootfs.ext2 ├── rootfs.tar ├── sdcard.img ├── u-boot.bin └── u-boot.itb Creating bootable SD card: ========================== Simply invoke (as root) sudo dd if=output/images/sdcard.img of=/dev/sdX && sync Where X is your SD card device Serial console -------------- Baudrate for this board is 1500000 Login: ------ Apply power and press the PWR button for 3 sec. Enter 'root' as login user, and the prompt is ready. https://wiki.amarulasolutions.com/bsp/rockchip/rk3399/npc_t4.html