ts_calibrate - A test program to calibrate a touch screen used by
tslib.
ts_calibrate is used to manually configure tslib's
linear filter plugin. It draws crosshairs to the framebuffer to be
touched by the user and records expected vs. actual touch contact positions
needed to apply the filter and provide a desired touch user experience. It
uses the TSLIB_CALIBFILE environment variable to store it's
values.
-r, --rotate [value]
Rotate the screen. value is 0 for 0 degree, 1 for 90
degrees (CW), 2 for 180 degrees (upside down) and 3 for 270 degrees (CCW).
This value will be added to the calibration config file TSLIB_CALIBFILE and
picked up from the linear filter module from there. It can be changed by a
linear module parameter.
-t, --min_interval
The time in milliseconds that has to pass before a
crosshair is pressed by the user. This may be useful to avoid insanely fast or
accidentally wrong taps and thus inaccurate calibration. Default: 0.
-c, --validate
Validate the calibration. Make sure the linear module is
configured in ts.conf so that the current calibration is applied. In this
mode, crosses are displayed at random locations on screen and touches are
evaluated against their positions. In this mode the --loops and --boundary
options are available.
-b, --boundary
Validation boundary in pixels. Available only when
--validate is used. This defines how strict the validation should be. It's the
the distance that an evaluated touch input is allowed to be apart from a cross
to still pass the validation. If this boundary is crossed, validation fails.
Default: 10.
-l, --loops
Number of loops in validation mode. Available only when
--validate is used. This defines how many crosses should be touched and
evaluated. Default: 3.
ts.conf (5), ts_test (1), ts_uinput (1)