This section show how to install a new operating system to your DragonBoard™ 845c based RB3 kit using the fastboot method on a Linux host computer.
- Step 1: Make sure fastboot is set up on host computer
- Step 2: Connect host computer to RB3
- Step 3: Boot RB3 into fastboot mode
- Step 4: Flash Bootloader
- Step 5: Recall location of all downloaded files
- Step 6: Unzip all files
- Step 7: Flash all files to the RB3
- Step 8: Reboot RB3
Step 1: Make sure fastboot is set up on host computer.
You can install fastboot from source or using your distro package manager.
- Android SDK “Tools only” for Linux can be downloaded here
- The Linux “Tools Only” SDK download does not come with fastboot, you will need to use the Android SDK Manager to install platform-tools.
- To do this follow the “SDK Readme.txt” instructions included in your SDK “Tools Only” download.
If you are still having trouble setting up fastboot, click here for a short tutorial video
Or using a distro package manager:
# Red Hat flavour (Fedora, CentOS) $ sudo yum install android-tools # Debian (Ubuntu) $ sudo apt-get install android-tools # Ubuntu 16.04 (Xenial) and beyond $ sudo apt-get install android-tools-fastboot
Step 2: Connect host computer to RB3
- RB3 must be powered off (unplugged from power)
- S6 switch on RB3 must be set to ‘0-0-0-0’. All switches should be in “off” position
Step 3: Boot RB3 into fastboot mode
Please read all bullet points before attempting
- Disconnect the power cable from the board and make sure no USB cable is plugged into the board
- Hold down the “VOL-“ button while reconnecting the power supply.
- Tap the “ON/OFF” button while continuing to hold the “VOL-“ button for ~5 seconds after the blue LED lights up.
- Release “VOL-“ button
- Connect the USB3 Type C (5) between the Linux PC and the board
- Board should boot into fastboot mode.
From the connected host machine terminal window, run the following commands:
# Check to make sure device is connected and in fastboot mode $ sudo fastboot devices
Typically it will show as below
Step 4: Flash Bootloader
- Use host computer
- Download Bootloader from the Downloads Page.
- Open “Terminal” application
- Recall location of Bootloader download.
- The bootloader file should be named
- Y represents AOSP or Linux, use either one or the other based on the image you want to use. They both use different GPT.
- XX represents the release number of the Bootloader
cdto the directory with your unzipped Bootloader Folder
$ cd <extraction directory> #Example: cd /Users/YourUserName/Downloads #<extraction directory> = /Users/YourUserName/Downloads #For this example we assume the "Bootloader" is in the Downloads folder. $ cd <unzipped Bootloader folder> #Example: cd dragonboard-845c-bootloader-ufs-linux-14 #<unzipped Bootloader folder> = dragonboard-845c-bootloader-ufs-linux-14 #This example took place during release 14 # This command will execute the flashall script within the bootloader folder $ sudo ./flashall
The bootloader has now been flashed to the UFS. Rebooting will launch the newly-flashed boot loader, which will allow us to flash the remaining parts of the operating system.
# Reboot the system so we can flash the rest. $ sudo fastboot reboot
Step 5: Recall location of all downloaded files
Recall location of all downloaded files from the downloads page, files will be different for Android and Linaro/Debian:
Linaro/Debian: Recall location of
rootfs downloaded from the downloads page
- You should have downloaded the
- You should have downloaded ONE of rootfs
orDesktop - ALIP` version)
AOSP: Recall location of
cache.img.tar.xz, downloaded from the downloads page
- All of these files should have been downloaded from the downloads page
Step 6: Unzip required files
$ gunzip boot-*.img.gz $ gunzip linaro-*.img.gz
$ tar -xvf boot.img.tar.xz $ tar -xvf system.img.tar.xz $ tar -xvf userdata.img.tar.xz $ tar -xvf recovery.img.tar.xz $ tar -xvf persist.img.tar.xz $ tar -xvf cache.img.tar.xz
Step 7: Flash all images to the RB3
- Use host computer
- Use “Terminal” application
- Recall location of extracted(unzipped) files
cdto the directory with your unzipped files
- From within extraction directory, execute the following commands:
# (Once again) Check to make sure fastboot device connected $ sudo fastboot devices # It will show similar to below if the device is connected successfully de82318 fastboot # cd to the directory the boot image and were extracted $ cd <extraction directory> # Make sure you have properly unzipped the boot and rootfs downloads $ sudo fastboot flash boot boot-linaro-buster-dragonboard-845c-**BUILD#**.img $ sudo fastboot flash rootfs linaro-buster-developer-dragonboard-845c-**BUILD#**.img
Note: Replace BUILD# in the above commands with the file-specific date/build stamp.
# (Once again) Check to make sure fastboot device connected $ sudo fastboot devices # It will show similar to bellow if the device is connected successfully de82318 fastboot # cd to the directory with extracted images $ cd <extraction directory> # Make sure you have properly unzipped the downloads $ sudo fastboot flash boot boot.img $ sudo fastboot flash system system.img $ sudo fastboot flash userdata userdata.img $ sudo fastboot flash recovery recovery.img $ sudo fastboot flash persist persist.img $ sudo fastboot flash cache cache.img
Step 8: Reboot RB3
- Unplug power to RB3
- Ensure HDMI connection to monitor
- Ensure keyboard and/or mouse connection (Depending on your rootfs selection)
- Plug power back into RB3
- Wait for board to boot up
- Board will boot into either command line or desktop depending on rootfs
Note: For Linaro/Debian the username and password are both “linaro” when the login information is requested.
Congratulations! You are now booting your newly installed OS directly from UFS on the RB3!