OLIMEX© 2015
A20-SOM user's manual
8. 1080p24
9. 1080p50
10. 1080p60
For VGA (VGA is available out-of-the-box only in the A20-SOM + A20-SOM-EVB combination,
else additional hardware is required):
0. 1680×1050
1. 1440×900
2. 1360×768
3. 1280×1024
4. 1024×768
5. 800×600
6. 640×480
7. 1920×1080
8. 1280×720
Depending on the display or the screen you want to use with the A20-SOM, you might need to
apply software changes to the prebuilt Android or Linux image. The easiest way would be to do it
on the board itself but it can be done offline too (manipulating the image located on the microSD
card via a microSD card reader).
The tools for script.bin changing are located in /opt/sunxi-tools directory:
cd /opt/sunxi-tools
./chscr.sh
This will convert script.bin file from sdcard to script.fex file and the file will be opened using nano
editor. Now you can change the board modules and parameters, save the changes ("CTRL"+"X";
confirm with "Y") and exit ("CTRL"+"X" again) from nano editor.
./wrscr.sh
this will convert script.fex to script.bin and the script.bin file will be written to the microSD card.
reboot
Reboot the board and the new settings would be enabled.
For the Debian Linux releases, this means that you would need to edit the configuration file
script.bin and edit the settings inside. This file is usually located in the main partition of a prepared
microSD card. Script.bin can't be opened in the binary format so you would need to convert it to
.fex file format first. There are ready-to-use tools that convert script.bin <-> script.fex. Note that
script.bin/fex contains configuration settings and definitions not only for the video output but also
for the pin descriptions and names; power setting and much more. If you really want to modify and
customize the default images (to change port functions, port names, to disable specific peripherals)
you would need to be able to edit the script files. Please refer to the following web page for more
information:
http://linux-sunxi.org/Fex_Guide
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