Ticket #11704 (closed enhancement: fixed)

Opened 3 years ago

Last modified 2 years ago

OFW - calibrate Raydium touchscreen

Reported by: wmb@… Owned by: wmb@…
Priority: normal Milestone: Not Triaged
Component: ofw - open firmware Version: not specified
Keywords: Cc: pgf, martin.langhoff
Action Needed: no action Verified: no
Deployments affected: Blocked By:


The EETI touchscreen needs calibration after assembly, otherwise there may be dead zones or other mis-tracking.

It would be good to do it during factory test.

That said, I wonder if the calibration might drift before the unit is deployed, maybe as a result of temperature, altitude, humidity, shipping conditions, or other factors. So it might be a good idea to recalibrate it somewhere else too, perhaps just before booting, or somewhere in the Linux startup.

Change History

Changed 3 years ago by wmb@…

  • summary changed from OFW - calibrate EETI touchscreen to OFW - calibrate Raydium touchscreen

Changed 3 years ago by wmb@…

  • next_action changed from code to add to release

Implemented by svn 2896. Test build at http://dev.laptop.org/~wmb/q4d04me.rom

You can test it as follows:

Decalibrate the touchscreen.  Type the following line and hold your palm on
the screen as you type the "enter".  Hold you palm on the screen for 2 seconds

  ok select /touchscreen  calibrate  unselect

Disable autocalibration and verify that the calibration is bad:

  ok dev /touchscreen
  ok patch noop calibrate selftest
  ok dend
  ok test /touchscreen

The tracking should be bad, reflecting the miscalibration.

Verify that the autocalibration fixes it:

  ok dev /touchscreen
  ok patch calibrate noop selftest
  ok dend
  ok test /touchscreen

Changed 2 years ago by Quozl

  • status changed from new to closed
  • next_action changed from add to release to no action
  • resolution set to fixed

Is in Q4D06.

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