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The Einstein A20 is a very compact (75x50mm, Credit Card size) Allwinner A20 ARM dual core based device.
- Allwinner A20, ARM Cortex A7 1.0Ghz, Mali 400 MP2 complies with Open GL ES2.0/1.1
- 1GB DDR3 RAM memory
- 8GiB eMMC
- AP6210 onboard, wifi 802.11 abg/n, Bluetooth 4.0. Supply Ipex connector, can support ceramic antenna, FPC antenna, telescopic antenna.
- RTC with dedicated battery connector
- USB OTG
- Li-Po battery charger with dedicated battery connector
- IPEX connector for CVBS signal.
- 200 pins stamp hole package
Before flashing the image
The Einstein A20 has no SD card connector, it has only the internal eMMC. This can be accessed USB-OTG by u-boot ums command, which emulates a mass storage USB device. For this a serial TTL cable needs to be connected to get access to the u-boot console and the board needs to be powered by the host computers USB.
Install the sunxi tools on the host computer
zypper install sunxi-tools
Download the Einstein A20 u-boot rpm from here and extract the files in it
rpm2cpio u-boot-einsteina20-<version>.armv7hl.rpm | cpio -idmv
Start a serial console terminal (e.g. miniterm which is part of the pyserial package).
miniterm /dev/ttyUSB<N> 115200 --raw --eol=LF
Unplug the Einstein A20 USB and hold the "UBOOT" button (nearby the LiPo connector) down while reconnecting it. The board will then start in "FEL mode". Download and start the u-boot via USB:
sunxi-fel uboot boot/u-boot-sunxi-with-spl.bin
Stop the u-boot boot process by pressing enter in the serial console terminal. Then run on u-boot commandline:
ums 0 mmc 1
Now a new /dev/sdX device should appear on the host computer. Use this for flashing the image. The u-boot in the image supports the ums command, so the FEL mode uboot download is no more needed. The u-boot mass storage device emulation is not very fast, so it could take more than 30 minutes to flash the image.
Warning: This will overwrite the eMMC, all data is lost after that and cannot be restored!
- Download the image you want (Leap is stable, Tumbleweed is rolling) from here:
If the direct links above do not work for you, please check the general download directory for the images.
- As root extract the image onto your SD card (replace sdX with the device name of your SD card).
WARNING: all previous data on the SD card will be lost. Check first if the device you have selected is really your SD card!
xzcat [image].raw.xz | dd bs=4M of=/dev/sdX iflag=fullblock oflag=direct; sync
- Insert the SD card with the openSUSE image into your board.
- Connect the board to your PC via serial port (optional, but helpful for debugging; USB-TTL serial cable needed).
- Connect the board to your monitor (via DVI/HDMI, optional).
- Power on the board.
- Walk through the first boot steps.
- Ethernet is configured to request an IP via DHCP, check your DHCP server for the board IP if used.
- Have a lot of fun...