3M™ Multi-Touch Desktop Display User Guide
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3M Touch Systems, Inc. Proprietary Information – TSD-40532C
The Calibrate Extended command then positions the first calibration target inward from
the lower left corner (0,1049) and the second calibration target inward from the upper
right corner (1679,0). The following illustration shows how the calibration targets are
calculated for a Windows-based system. Your operating system may be different.
The illustration below shows the coordinates of the calibration targets and display
corners. The corners show the video coordinates in parentheses and the touch screen
coordinates in brackets.
Get Feature - GetStatus
This is a request to send information that indicates the status of the controller. Among the
uses for this request are determining whether there were any power on check errors and
determining whether the last request was completed successfully.
Table 5. Controller Status Setup Stage
Offset
Field
Size
Value
Description
0 bmRequestType
1
0xA1
Class,D2H,Interface
1 bRequest 1
0x01
Get
Report
2 wValue
2
0x0306
msb=03=Feature
lsb=06= Feature Report ID
4 wIndex
2
0 Always
0
6 wLength
2
8 Always
8
Table 6. Controller Status Data Stage (controller response)
Offset
Field
Size
Value
Description
0
Report ID
1
0x06
Feature Report ID
1
POC Status
1
0xXX
Power On Check Status
2
Cmd Status
1
0xXX
Status of last command
3 Touch
Status
1
0 Not
used
4
Async Reports
1
0xXX
0x00 = async touch output off
0x01 = async touch output on
5-7
Not used
3
0
Not used
(0, 1049) [0, 32767]
(1679, 1049) [32767, 32767]
Upper Right Calibration Target
X = 1679 – (1920 x 1/8) = 1679 – 240 = 1439
Y = 0 + (1080 x 1/8) = 0 + 135 = 135
Lower Left Calibration Target
X = 0 + (1920 x 1/8) = 0 + 240 = 240
Y = 1049 - (1080 x 1/8) = 1049 - 135 = 914
(0, 0) [0, 0]
(
1679, 0) [32767, 0]
(240, 914)
(1439, 135)
