3M Touch Screen Controller RX181, Справочное руководство

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20 3M™ MicroTouch™ Controller RX181 Reference Guide
3M Touch Systems, Inc. Proprietary Information
Note:
The Touch_Reports_Utility command causes the controller to send Report 7 from
the endpoint 0 exclusively. This action is essential in getting a calibration utility to
function. The endpoint 1 does not send any reports at this time. The
Touch_Reports_Restore command causes the controller to send the previously active
asynchronous report (REPORT_ID_HID or REPORT_ID_PACKED) from endpoint 1.
Table 9. Set Asynchronous Report
Offset Field Size Value Description
0 bmRequestType 1 0x21 Host to device
1 bRequest 1 0x09 Set Report
2 wValue 2 0x0303 03 = Feature
03 = Feature Report ID
4 wIndex 2 0 Always 0
6 wLength 2 8 Always 8
Table 10. Data Stage
Offset Field Size Value Description
0 bReport ID 1 0x03 Feature Report ID
1 bmReport Subtype 1 0x05 Indicates a SetAsynchReport
2 Not used 2 0 Not used
4 bReport 0x00 0 Touch_Reports_Off
1 Touch_Reports_On
2 Touch_Reports_HID
3 Touch Reports_Packed
6 Touch_Reports_Utility
7 Touch_Reports_Restore
5 Not used 3 Not used
Response
The device stalls endpoint 0 if it cannot process this request.
Set Feature – Calibration
This is a request to perform a 3-point calibration. The calibration can be performed at
points inset from the lower left, upper left and upper right corners. The 3-point
calibration defines the active area of the sensor by mapping two targets displayed on the
video image to absolute X and Y coordinates on the sensor.