Allwinner A20 User Manual download pdf (Page 43)

Q: How to detect and enable the Ethernet controller (if it is disabled by default)?

A: You can enable it by following these two steps:

1. To check under what name the LAN is associated write "ifconfig –a"

2. If, for example, it is under eth0 name, then write: "dhclient eth0"

This should enable the Ethernet and then SSH would also be available.

You can also enable auto detection of Ethernet on power-up by uncommenting #auto eth0 in

/etc/network/interfaces in the Linux image.

Q: How to generate boot-able SD-card Debian Linux image for A20-OLinuXino?

Follow our blog post with step by step instructions (at link:

http://olimex.wordpress.com/2013/09/18/7795/) note that Linux-Sunxi Kernel is a work-in-

progress, this means you can try the current stage/sunxi-3.4 branch but if something is broken and

doesn't work just revert to the git tags we give in the blog and they should work for sure.

Q: How to install Android on an SD-card?

Two images are build one for 7″ LCD and one for 10″ LCD https://www.olimex.com/wiki/A20-

OLinuXino-MICRO#Android

To write the images on the SD card you will need PhoenixSuit and to follow these steps:

• Install and run PhoenixSuit.

• Go to the firmware tab of the program and point to a valid Android image (note that the images

on Gdrive are compressed and you have to extract them to .img files to be able write them with

PhoenixSuit)

• Disconnect the power supply and USB cable from the A20 board. Put an SD card in micro SD

holder. We recommend 4GB class 10 card.

• Press and hold RECOVERY button, apply power supply (6-16)V, release RECOVERY button.

• Connect USB cable to the mini USB connector.

• You will be asked for drivers for the boot-loader. Navigate to the folder where you extracted

the PhoenixSuit and install the drivers from the respective executables (or manually point the

installer to the drivers folder in the PhoenixSuit installation path).

• PhoenixSuit will detect the board and would ask for the method of writing the image. Choose

method of writing the image and confirm your wish to write the image.

• Wait till upgrade succeeds

Note that it is not recommended to have your mini USB connected to an external USB hub. This

might cause delays and might distort the signal levels. Always test with the USB connected straight

to the USB ports of your computer.

Important: When Android runs for very first time it takes several minutes to initialize all files and

buffers please do not cut the power supply during this process! Also when fresh image is installed

fast boot may be disabled, which means that when you apply power supply after few seconds

Android will go in sleep mode and you have to press POWER button to start it, you can change to

fast boot when you power off there is dialog box asking you if you want next boot to be fast boot,

you have to check this box before you power off. Also note that you must do touch screen

calibration when you run Android for very first time which might require a mouse.

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Allwinner A20 User Manual Page 43