OLIMEX© 2018
A20-OLinuXino-MICRO user's manual
More information about the video output settings and the usage of video settings script might be
found in the next chapter “2.7 Changing the default image resolution”.
2.6.2 VGA monitor
All official Debian images for A20-OLinuXino-MICRO have the option to for VGA video output
via the 6-pin VGA connector. If you wish to transform the custom 6-pin connector to a standard 15-
pin VGA connector you can either use wires or get a ready adapter called “A20-VGA-CABLE”.
More information about the video output settings and the usage of video settings script might be
found in the next chapter “2.7 Changing the default image resolution”.
2.6.3 SSH via mini USB cable in Debian
The latest official Debian Linux image allows the use the USB_OTG connector for SSH connection
without the need of a LAN cable or a serial cable. You can use a mini USB cable connected
between your host PC and the on-board mini USB connector. For connection convenience there is a
DHCP server running specifically for USB0 interface. The DHCP server should give IP address to
the new USB0 interface of your host PC so you can make SSH connection from your PC to the
default board IP address of the USB0 interface – 192.168.2.1.
You can connect to the board using a mini USB cable and an SSH client (if you use Windows you
might use "puTTY", for example) at address 192.168.2.1.
For Windows operating system – upon connection, the board should show up in "Windows Device
Manager" as "RNDIS Ethernet Gadget". You might be asked to install a driver. The drivers can be
found online as "RNDIS driver" (Remote Network Driver Interface Specification). The drivers are
provided by Microsoft and they should be available for every Windows distribution – refer to the
respective files and articles provided by Microsoft on how to install the required drivers.
2.6.4 SSH via Ethernet
By default the board requests IP address from the network's DHCP server. You need to find what IP
address was assigned to the board before being able to access it over the network. Knowing the IP
address assigned allows you to connect to the board using an SSH client (for example “puTTY”)
then you have to use this address. You can change this policy or the address by editing
/etc/network/interface file.
Note that for internet connection you have to set your gateway address in /etc/network/interfaces
file and you have to set your DNS server in /etc/resolv.conf (for example “nameserver
192.168.1.1”)
2.6.5 LCD display
One of the ways to interact with the board is via an external display (with or without touchscreen
component). The 40-pin male connector LCD_CON has the typical 0.1'' pin step. All Olimex
displays have corresponding 40-pin male connector. You would only need a 0.1'' female-female
cable for the hardware connection.
In order to get the video output on the LCD display you might need either to run at least once a
configuration script (if you use Debian Linux) or download a suitable image (if you use Android).
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