Rotate

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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

rotated

• author: Kurt Van Dijck <kurt.van.dijck_at_skynet.be>
• [1] ipkg for 2008.12
• [2] for sources

I found that rotating the desktop area in landscape (using xrandr) makes the XGlamo eat the CPU on my GTA-02 system.

Rotating the display head (xrandr --output default ...) works without major CPU load.

By using no libxrandr, but invoking xrandr commands, it only depends on the accelerometer.

omnewrotate at code.google.com

• author: Rui Miguel Silva Seabra <rms_ghaaaNoSpamPlease_at_1407_org>
• related blog posts:
  • http://blog.1407.org/tag/rotate
  • Patch for using libxrandr instead of system+xrandr
• source codes http://code.google.com/p/omnewrotate/ (there are problems with projects.openmoko.org )
• Arm releases built

accel-rotate at projects.openmoko.org

Rotate Rotates the screen according to the position of the Neo FreeRunner. Homepage: http://projects.openmoko.org/projects/accell-rotate/ Package: accel-rotate (external download) Tested on: FSO, ASU, QtExtended

• Om2008.x package:

opkg install http://projects.openmoko.org/frs/download.php/455/accel-rotate_0.41_armv4t.ipk

• Qt Extended 4.4.1 package:

opkg install http://projects.openmoko.org/frs/download.php/456/accel-rotate-qte_0.41_armv4t.ipk

• Source codes are in subversion, developers are welcome
• TODO:
  • better heuristics - any ideas how to do this well? please use discussion on this wiki.
  • disabling on screensaver
• [3] how to display data from accelerometers on Desktop with gnuplot (there is a few of czech text, but there is also youtube video).

Simple-rotate

Simple-Rotate Rotates the screen according to the position of the Neo FreeRunner. Homepage: http://projects.openmoko.org/projects/simple-rotate/ Package: simple-rotate (external download) Tested on: ASU, Debian

Author: Miguel Angel Vilchez Lopez

• Debian package:

wget http://projects.openmoko.org/frs/download.php/584/simple-rotate.deb
dpkg -i simple-rotate.deb

• ASU binary:(Sorry, but still i have no ipkg package)

wget http://projects.openmoko.org/plugins/scmsvn/viewcvs.php/*checkout*/opkg/simple-rotate?rev=4&root=simple-rotate
chmod +x simple-rotate
./simple-rotate &

See also

• October 13th version.

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