PiScreen2 calibration challenge

Forums Technical Support for PiScreen PiScreen2 calibration challenge

Viewing 1 post (of 1 total)
  • Author
    Posts
  • #16643
    Philippe Jeanmaire
    Participant

    Hi Mark,

    I develop my applications on Raspberry Pi3A+ with PiScreen2.  Did an initial calibration and recorded the results in 99-calibration.conf.

    All worked well, and after 2 months I am ready to get prototypes in the field.... But I observed over time that the taps on the left side of the screen got less and less precise... to the point where I cannot tap on buttons in top left corner.

    I use 'ts_calibrate' to read coordinates of set points.
    screen 1 results (point: X, Y):

    top left:                571, 1313
    top right:          3483,  949
    bottom right:  3487, 3074
    bottom left:       566, 2705

    The Y range on the left side is 1313 - 2705  and on the right side 949 - 3074!  Running 'ts_test' I cannot drag the cursor to the bottom or the top on the left side.

    Same test on a new PiScreen2 the results are (screen 2):

    top left:                528,  794
    top right:          3487,   771
    bottom right:  3493, 3314
    bottom left:       523, 3331

    and cursor can be dragged over the whole screen... which seems 'normal'

    What are your thoughts on these observations?

    Note: I have replaced the tall 2x13 female header (situated on the opposite side of the top left corner of the screen) with a low profile header .  Could the heat used to solder it have something to do with it?

    Phil

Viewing 1 post (of 1 total)
  • You must be logged in to reply to this topic.

Blip, blop, bloop...