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Here's a quick and simple C program that reads a packet from the
accelerometer once per second, and rotates the screen to a new
orientation if the orientation has changed.
I don't mean this to conflict with Paul's excellent work on Gestures; my reason for writing it is so that it can be used as an always-on daemon in the OM distributions. (Full gesture interpretation is more CPU heavy and requires reading data more often than once per second, so perhaps that will be done on-demand instead of always-on.)
The code is: http://github.com/cjb/freerunner-rotate/tree/master/rotate.c?raw=true
There's an ARM binary here (chmod a+x rotate && ./rotate): http://dev.laptop.org/~cjb/rotate
accel-rotate
Rotates the screen according to the position of the Neo FreeRunner.
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opkg install http://projects.openmoko.org/frs/download.php/435/accel-rotate_0.4_armv4t.ipk
opkg install http://projects.openmoko.org/frs/download.php/436/accel-rotate-qte_0.4_armv4t.ipk