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OPUS Projektor Manual
OPUS devices update manual
If the calibration went wrong, i.e. there was a double press and the cross hair "jumped" two
positions at once, repeat the calibration in one of the ways described above.
On the serial console, the output while running the calibration, looks like this:
root@rosi /$ ts_calibrate
xres = 480, yres = 272
Took 24 samples...
Top left : X = 3593 Y = 3072
Took 34 samples...
Top right : X = 476 Y = 3211
Took 36 samples...
Bot right : X = 542 Y = 657
Took 43 samples...
Bot left : X = 3633 Y = 806
Took 46 samples...
Center : X = 2075 Y = 2098
497.903076 -0.122414 -0.002674
275.258942 0.000120 -0.070859
Calibration constants: 32630576 -8022 -175 18039370 7 -4643
65536
Note that xres and yres will differ depending on the device that is calibrated (the example
above is from an A3, for A6 it will be 800 and 480, respectively).
Also note that the values for X and Y and the calibration constants will differ for each device
depending on each individual touch screen.
Testing the touch screen
There is also a touch screen test program installed with the Linux operating system. This can
be started through the serial console with the command ts_test
Note that for this to work best the running application should be stopped as described
above .
The touch screen test program can be stopped by pressing CTRL+C on the serial console.
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