Matrix-orbital GTT70A Manual de usuario descargar pdf (Pagina 42)

Command Summary 38

12.5 Set Dragging

Threshold

Dec

Hex

ASCII

254 137

FE 89

þ ‰

Threshold

2.0

Set the distance a press is required to travel before a move event is reported. Precision will vary inversely to data

transmitted; care should be taken to find a suitable balance. Distance is calculated as [∆x]^2 + [∆y]^2 = d^2.

Threshold

Short

Dragging threshold value. Default is 3 pixels.

12.6 Calibrate

Touch Screen

Dec

Hex

ASCII

254 139

FE 8B

þ ‹

2.0

Initiate the touch screen calibration sequence. After user input is complete a confirmation byte will be returned,

new calibration settings will be loaded, and the calibration will be saved as \SYSTEM\touchcal.dat. Calibration can

be restored from the file listed above at any time.

Return Message

252 139 Length

Result

Byte

Outcome of Calibrate Touch Screen command, as per

eCalibrationErrorCode values.

Table 30: eCalibrationErrorCode values

Value

Description

Calibration Successful

Calibration Invalid

12.7 Load Region

File

Dec

Hex

ASCII

254 140

FE 8C

þ Œ

FileName

2.0

Load a group of touch region definitions from a file, old regions are cleared. See the Region File example.

FileName

ASCII String

Filename, and path from the root folder, of the region file to load.

Return Message

252 140 Length

Result

Byte

Outcome of Load Region File command, as per eErrorCode values.

12.8 Restore

Touch Calibration

Dec

Hex

ASCII

254 141

FE 8D

þ •

2.0

Restore touch calibration using the data from \SYSTEM\touchcal.dat, if this file is present.

Return Message

252 141 Length

Result

Byte

Outcome of Restore Touch Calibration command, as per

eRestoreCalibrationErrorCode values.

Table 31: eRestoreCalibrationErrorCode values

Value

Description

Restore Calibration Invalid

Restore Calibration Successful

1 2 ... 37 38 39 40 41 42 43 44 45 46 47 ... 52 53

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Matrix-orbital GTT70A Manual de usuario Pagina 42

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