== Build ==

Before using, we need to get the code and build it:
{{{
 $ bzr branch lp:~oif-team/oif/ntrig-calibrator
 $ cd ntrig-calibrator
 $ sudo apt-get install libusb-dev
 $ make
}}}

== Calibrating the Device ==

So far, we've seen evidence that the latest N-trig firmware causes the hardware to slowly become "de-calibrated" and in need of updating. The simplest way to determine if your device is capturing touch events in an expected manner is to use the [[Multitouch/Testing/UsingMtview|mtview tool]]. If when you run {{{mtview}}} your device is only showing touches for some parts of the screen, touches are offset, or you have to press very hard to register a touch, calibration is very likely needed.

To calibrate your N-trig device, just do the following:
{{{
sudo ./calib.sh
}}}

For which, you should get output something like the following:
{{{
[sudo] password for oubiwann: 
make: `calib' is up to date.
bus 0
bus 0
done
make: `firmware' is up to date.
firmware version: 4.7.17.20.7 (0c001e08 8f220000)
mode: 0d010000
}}}

Usually, one pass of the tool will fix things up. Try running [[Multitouch/Testing/UsingMtview|mtview]] again, to see if your touch experience has improved. On occasion, a user has needed to run {{{calib.sh}}} multiple times to see good results.