OLIMEX© 2018
A20-OLinuXino-MICRO user's manual
Video output settings are hard-coded in Android images
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”.
2.7 Changing the default image resolution
Depending on the display or the screen you want to use with the A20-OlinuXino-MICRO, you
might need to apply software changes to the prebuilt Android or Linux image.
The typical OlinuXino user would not need to edit the files, however.
To ease the process of changing the resolution we have compiled a number of Android images
for the Android users (with hard-coded video output settings). Alternatively, for Debian Linux
users, we have provided a shell script that can be executed in order to set preferred video
output and resolution.
For Android that you boot from the NAND memory you would need an image suitable for the
specific resolution. Download locations to such images might be found at the wiki article for the
A20 board here:
https://www.olimex.com/wiki/A20-OlinuXino-MICRO
For Linux Debian you would need to execute a shell script to be able to change the resolution. It is
very good idea to use a serial cable for connection to the board from a personal computer since in
this case you are dependent on a video resolution (a cable like USB-SERIAL-CABLE-F). When the
board boots type:
./change_display*
or
./change_display_A20_OlinuXino.sh
and choose the resolution and the interface (LCD, HDMI or VGA).
The supported resolutions are:
For LCD:
1. 4.3" (480×272)
2. 7" (800×480)
3. 10" (1024×600)
For HDMI:
0. 480i
1. 576i
2. 480p
3. 576p
4. 720p50
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