Upgrade to SD card Introduction This article mainly introduced how to upgrade the firmware on the host to the SD card, which needs to be selected according to the host operating system. Please note the updated firmware type: Raw firmware or RK firmware Preparatory work Face-RK3399 Firmware Computer host SD card Windows Etcher Etcher is a graphical SD card upgrade tool for Windows, Linux and Mac. Download the way Etcher Official website SD Firmware Tool SD Firmware Tool download page to download SD_Firmware_Tool, And decompression. Upgrade Unified firmware Raw firmware It is easy to upgrade with Etcher: Select the firmware Select device Start upgrading RK firmware : Run "SD_Firmware_Tool.exe": Insert SD card. Select the device corresponding to the SD card from the combo box. Check the SD startup option. Click the select firmware button and select the firmware in the file dialog box. Click the start creating button. The warning dialog box will be displayed, and select yes to ensure that the correct SD card device is selected. Wait for the completion of the operation until the prompt success dialog box appears: Unplug the SD card. Linux After the SD card is connected to the computer with the card reader, the computer will detect the corresponding device. ls /dev/sdb # The situation depends on the specific equipment Preparation tools dd (Ubuntu) Etcher (Android、Ubuntu) Etcher under Linux is used in the same way as that under Windows. Please refer to the use method of [Etcher] under Windows. Upgrade Unified firmware Raw firmware : sudo apt-get install pv ## install pv pv -tpreb /path/to/system.img | sudo dd conv=fsync,notrunc of=/dev/sdb ## Upgrade progress visualization or sudo dd conv=fsync,notrunc /path/to/system.img of=/dev/sdb