After I had a few issues with the ODroid C1 3.2" display I now bought an admatec C-Berry 3.2" display for the same purpose. Unlike the nice 7" display I have and that is auto-detected, this 3.2" display remained black after attaching it electronically.
So I built the BCM2835 library:
wget http://www.airspayce.com/mikem/bcm2835/bcm2835-1.48.tar.gz tar zxvf bcm2835-1.48.tar.gz cd bcm2835-1.48 ./configure make sudo make check sudo make install cd ..
And built the C-Berry:
wget http://admatec.de/sites/default/files/downloads/C-Berry.tar.gz tar xzf C-Berry.tar.gz cd C-Berry/SW/fb2cberry make -C . cd ../tft_test make -C . sudo ./tft_test
I can now
startx, open a Terminal and run
sudo fb2cberry to mirror the main HDMI display to the small screen, but
How to I set up the 3,2" display as the main screen to run in native resolution?