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Forum Index : Microcontroller and PC projects : GUI CALIBRATE value

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JohnS
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Joined: 18/11/2011
Location: United Kingdom
Posts: 4044
Posted: 07:58pm 24 Feb 2023
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Doing

GUI CALIBRATE

Done. No errors
Deviation X = -2, Y = -2147483648 (pixels)

Is the Y value OK?

This is PicoMite (non-VGA) V5.07.06 with the Boat computer hardware.

Displayed items seem where they should be so all in practice looks good...

John
Edited 2023-02-25 06:09 by JohnS
 
phil99

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Joined: 11/02/2018
Location: Australia
Posts: 2640
Posted: 09:27pm 24 Feb 2023
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No Errors is the bit that matters, Deviation is just information about the difference between your unit and the prototype.

Each time you calibrate you usually get slightly different deviations, as it is difficult to touch with one pixel accuracy. Parallax adds more unless your line of sight is exactly perpendicular to the screen. Manufacturing tolerances also contribute.

As long as it looks right it is right.
 
TassyJim

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Joined: 07/08/2011
Location: Australia
Posts: 6283
Posted: 01:12am 25 Feb 2023
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In Hex the y value is FFFF FFFF 8000 000
That looks "interesting"

Jim
VK7JH
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Geoffg

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Joined: 06/06/2011
Location: Australia
Posts: 3292
Posted: 02:42am 25 Feb 2023
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Internally the calibration error is a 32-bit signed integer and it looks like the PicoMite firmware tried to convert it to a 64-bit integer for display (and did not succeed).

This is not important, as Phil said "No Errors is the bit that matters".

Geoff
Geoff Graham - http://geoffg.net
 
JohnS
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Joined: 18/11/2011
Location: United Kingdom
Posts: 4044
Posted: 07:55am 25 Feb 2023
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No worries. Thanks.

John
 
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