Other Systems

In addition to openFyde, the XpressReal T3 supports other operating systems, such as Linux and Android. You can download the OS images from our Resource Download page to experiment with different systems.

Install Custom Linux Image

Our Linux OS images are built with the Yocto Project. Use balenaEtcher to flash a downloaded image to a microSD card, then boot your XpressReal T3 from it. Refer to the Getting Started Guide for flashing instructions.

Install Android OS Image

Download the Android Image from our Resource Download page and extract the .zip archive. You will find two folders inside: lk and image. The contents are used as follows: files in the lk folder need to be uploaded to the XpressReal T3 through the serial port, while files in the image folder need to be copied to a USB drive.

1. Enter recovery mode

Follow the instructions in the Unbrick the XpressReal T3 to put your XpressReal T3 into Recovery mode.

2. Upload files with Y-modem

Press h in keyboard, then send RTD1619B_hwsetting_BOOT_LPDDR4_32Gb_ddp_s1600_final.bin file by Y-modem protocol:

Sending file

Press d in keyboard, then send uda_emmc.bind.bin file, when it finished, press g to write uploaded file to eMMC.

Press d in keyboard, then send boot_emmc.bind.bin file, when it finished, press b1 and b2 to write uploaded file to eMMC.

3. Reboot to uboot

After upload and write those files, replug the power supply to reboot XpressReal T3, it will enter uboot by default:

Uboot Prompt

Enter the following commands to setup sysparam

sysparam default
sysparam save

4. Copy image to USB drive

Copy all the files in image folder to the root of the USB drive, then plug the USB drive to the USB 3.0 Type-C port.

Make sure the file system of your USB drive is FAT32 and the sector size of FAT32 is 512 because the uboot XpressReal T3 used only support this sector size.

Your can prepare the file system with the this command in a Linux console:

mkfs.vfat -S 512 /dev/sdXXX

5. Install Android to eMMC

Plug the USB drive to XpressReal T3, type usb start to confirm your USB drive has been recognized as Mass Storage Device, then type boot ru in uboot to start the installation:

Android Install

Wait for a while, when it finished, XpressReal T3 will reboot to Android.

Android desktop

Restoring openFyde OS from an Android System

To restore openFyde OS from Android, you need to flash the firmware of the XpressReal T3 to the stock one, then refer to the Getting Started guide to install openFyde OS.

Use the following instructions to restore to stock firmware.

download stock firmware from https://github.com/XpressReal/xpressreal/tree/main/recovery-fw
connect XpressReal T3 with your computer and copy the downloaded firmware to Android with adb

adb push Downloads/rtd1619b_emmc_bind_4gb.bin /storage/emulated/0/Download/rtd1619b_emmc_bind_4gb.bin

flash firmware

adb shell # connect to android shell with adb
su        # change to root

echo 0 > /sys/block/mmcblk0boot0/force_ro # disable eMMC boot area read-only
echo 0 > /sys/block/mmcblk0boot1/force_ro

dd if=//storage/emulated/0/Download/rtd1619b_emmc_bind_4gb.bin of=/dev/block/mmcblk0boot0 bs=4096 # flash firmware
dd if=//storage/emulated/0/Download/rtd1619b_emmc_bind_4gb.bin of=/dev/block/mmcblk0boot1 bs=4096

the firmware of XpressReal T3 has been restored, you can install openFyde OS now

If the Andoird system is broken or adb is not available, please refer to the instructions in the Unbrick the XpressReal T3 to revert your XpressReal T3 to openFyde OS.