Hi
If you have an Olimex A10 Lime you can run the script to control Gpios
This program should run on the A20Lime too... not tested yet...
Currently PullUP and PullDown setting are not implemented, if you need to setup that values please re-compile the FEX script as reported in the SUNXI instructions pages
Before complie teh program you have to check the beginning of the script and change the Matrix values to match your needs
Currently I'm running this script in 4 different programs (one for each connector) to manage over 90 Gpios... after some weeks it is still working with no problems
With simple changes all noobs (like me :-) ) should be able to run this script in all unsupported devices.
have a fun
L.