OLIMEX© 2018
A20-OLinuXino-MICRO user's manual
4. Unexport GPIO 49 when finished
echo 49 > /sys/class/gpio/unexport
A very good document on GPIO usage might be found here:
http://www.py6zgp.com/download/A20-GPIO.pdf
– the document was created by Dr. Guido Pelz.
2.10 I2C and SPI under Debian
I2C and SPI are both supported in the latest Debian releases. There is respective kernel support for
both. There is a python module called pyA20 might be found here:
https://pypi.python.org/pypi/pyA20
At the same web address you would also find a set of examples on how module is used.
2.11 Software support
We maintain Linux and Android images for SD card which might be downloaded for free and
modified as the user wishes. The latest images and updates are featured at the wiki article of the
device:
https://www.olimex.com/wiki/A20-OLinuXino-MICRO
We usually try to provide details on how to build the Linux and the Android images at our
wordpress page:
Another useful place is the Olimex forums where a lot of people share their experience and advice:
Additional Android and Linux support and features are added overtime. The Linux support is a
work-in-progress and you should not expect full Linux support after the initial volume of such
boards have become available on the market. If you are in a hurry consider the older OLinuXino
designs (which have almost everything supported, have examples available and so on).
You are more than welcome to send or share your suggestions and ideas at our e-mail, the public
forums or irc channel. We would attempt to help in almost every case. We listen to the feedback and
if the majority of users suggest a software change or update we try to implement such. Customer
feedback is very important for the overall state of the software support. However, do not expect full
Linux or Android software support.
We can share our experience. We can give you full details for things we have tried. We can point
you to a resource or a guide. We can give you general directions to solving a specific problem or
places to look for more information. However, we won’t install a piece of software for you or write
custom program for you. We won't provide a specific software solution to a specific software
problem.
Page 18 of 56
