3M™ Multi-Touch Chassis Display User Guide
29
3M Touch Systems, Inc. Proprietary Information -- 37732v04
Note:
Other screen resolutions will scale proportionally. The touch coordinates will not
change.
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
POC Status – The status of the Power-on Checks. Various controller systems are
checked at power-up. If any failures in these systems are detected, a POC flag is set. The
POC status field reports the state of these flags.
(0, 1049) [0, 32767]
(1679, 1049) [32767, 32767]
Upper Right Calibration Target
X = 1679 – (1680 x 1/8) = 1679 – 210 = 1469
Y = 0 + (1050 x 1/8) = 0 + 131 = 131
Lower Left Calibration Target
X = 0 + (1680 x 1/8) = 0 + 210 = 210
Y = 1049 - (1050 x 1/8) = 1049 - 131 = 918
(0, 0) [0, 0]
(
1679, 0) [32767, 0]
(210, 918)
(1469, 131)
