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I am interested in figuring out how to calibrate eink devices and build waveform tables from scratch, the procedures I read required letting the kindle test unit (one or more samples from each factory batch) settle for a long time at each required temperature (in a calibration oven) before examining contrast and distribution for each grayscale at each setpoint temperature. The waveform tables contain timing patterns for controlling grey values on the display, for each eink update mode and for a range of operating temperature.
Sadly, to do it right (if you cannot find a matching waveform table) can take many hours to develop your own custom waveform table. It may be easier just to test a collection of waveform files (harvested from a bunch of devices) to see which works best. And as mentioned above, the reference VOLTAGE must be calibrated for each eink batch as well, and that complicates the calibration procedure...
The diags firmware contains grayscale images that can be used for eink calibration.
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