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

There's also a complete rewrite at http://blog.1407.org/tag/rotate

Patches

And you're welcome to make patches against the GIT repo here:

  git://github.com/cjb/freerunner-rotate.git

• Patch for using libxrandr instead of system+xrandr -- Rui Miguel Silva Seabra <rms_ghaaaNoSpamPlease_at_1407_org>

Maintainership

Would anyone else be interested in being the maintainer of this package? It would involve packaging it up in bitbake/OE and trying to persuade the various OM distros to include it by default. (Perhaps with an on/off control panel entry in distros that make that easy to do?)

Comments appreciated. Thanks!

- Chris. -- Chris Ball <cjb_at_laptop_dot_org>

Packages and Binaries

• Arm releases built by Rui

accel-rotate at projects.openmoko.org

[1] how to display data from accelerometers on Desktop with gnuplot (there is a few of czech text, but there is also youtube video).

• project page
• Source codes are in subversion, every developer is welcome
• TODO:
  • disabling of rotation while shaking (some heuristics)
  • disabling of rotation while is screen saver running
  • is there any dbus event "disable rotation" ?
• Om2008.x package:

opkg install http://projects.openmoko.org/frs/download.php/392/accel-rotate_0.2_armv4t.ipk update-rc.d accel-rotate defaults

• Qt Extended 4.4.1 package:

echo "/opt/Trolltech/Qtopia/lib/">> /etc/ld.so.conf.d/local.conf # there are some important libraries ldconfig opkg install http://projects.openmoko.org/frs/download.php/415/accel-rotate_0.2_qte441_armv4t.ipk /etc/init.d/accel-rotate start update-rc.d accel-rotate defaults # start at boot time

Rotate Rotates the screen according to the position of the Neo FreeRunner. Homepage: [- -] Package: accel-rotate (external download) Tested on: -

See also

• October 13th version.

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