Matrix Orbital GTT70A - Manual (Page 42)

Command Summary 38
12.5 Set Dragging
Threshold Dec
Hex
ASCII 254 137
FE 89
þ ‰
Threshold
Threshold
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
Result Byte Outcome of Calibrate Touch Screen command, as per
eCalibrationErrorCode values.
Table 30: eCalibrationErrorCode values
Value Description
1 Calibration Successful
12 Calibration Invalid
12.7 Load Region
File Dec
Hex
ASCII 254 140
FE 8C
þ Œ
FileName
FileName
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
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
Result Byte Outcome of Restore Touch Calibration command, as per
eRestoreCalibrationErrorCode values.
Table 31: eRestoreCalibrationErrorCode values
Value Description
0 Restore Calibration Invalid
1 Restore Calibration Successful