man(1) Manual page archive


     TOUCHCAL(8)                                           TOUCHCAL(8)

     NAME
          touchcal - touch screen calibration

     SYNOPSIS
          touchcal

     DESCRIPTION
          Touchcal draws a cross-hair in each corner of the screen in
          turn (clockwise from the lower left hand corner), and waits
          each time for the user to touch the centre of the cross-hair
          with the stylus.  It then prompts with a final cross-hair in
          the centre of the screen, and waits once more for the user
          to touch its centre with the stylus.  The process is
          repeated until touchcal can calculate a transformation
          matrix that consistently maps the touch panel to screen
          coordinates.  It then writes corresponding calibration com-
          mands for touch(3) on its standard output, which can be
          saved in a file on the device, perhaps provided in NVRAM by
          tinyfs(3) or a file system in ftl(3).

          Touchcal can be used both inside and outside the wm(1) envi-
          ronment, allowing calibration when the system is ini-
          tialised, and whilst the window system is running.

     FILES
          /dev/touchctl      reset or read existing settings

     SOURCE
          /appl/cmd/touchcal.b

     SEE ALSO
          touch(3)