3M M2256PW Benutzerhandbuch

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3M™ Multi-touch Display M2256PW User Guide 

3M Touch Systems, Inc. Proprietary Information – 37531 Rev D

synchronous report in response to some of these requests. 

You need to know product ID (0502H) and the vendor ID (0596H) to write your own 
driver. These values are required for identifying the controller. 

The controller sends a variety of reports to the computer. The first byte of each report is 
the Report ID that defines the structure and content of the report. The controller sends 
some reports as a direct response to a computer request (synchronous).  The controller 
will also send some reports as the result of an external event, such as a touch 
(asynchronous).  

The USB command set is implemented by using HID Get Feature and Set Feature 
commands.  The various requests and reports are grouped together by report size under a 
common feature ID. 

The following table summarizes the available HID class requests. 

This is a command to do a Calibrate Extended style calibration.  The controller will auto-
orient on this 2 point calibration.  

Get Feature  

GetStatus 

0xA1 (D2H) 

0x01 

0x06 

-- 

8 

Set Feature  

Calibrate 

0x21 (H2D) 

0x09 

0x03 

4 

8 

Set Feature    Reset 

0x21 (H2D) 

0x09 

0x03 

7 

8 

Set Feature    Restore Defaults 

0x21 (H2D) 

0x09 

0x03 

8 

8 

Get Feature  

GetMaxCount 0xA1 

(D2H) 

0x01 

0x12 

-- 

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