3M M2256PW 用户手册

26 

 

3M™ Multi-touch Display M2256PW User Guide 

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

0 

Report ID 

1 

0x12 

Feature Report ID  

1 

Max Count 

1 

0x1E 

Number of actual 30 fingers 
supported 

Note:  The number of actual contacts reported may exceed this number (possibly up to 
60). 

This is a request to perform a controller reset. Soft resets are automatic after any block 
parameter changes. 

0 bmRequestType 

1 

0x21 

Class,H2D,Interface 

1 bRequest  1 

0x09 

Set 

Report 

2 wValue 

2 

0x0303 

msb=03=Feature 

 

lsb=03= Feature Report ID  

4 wIndex 

2 

0  Always 

0 

6 wLength 

2 

8  Always 

8 

0 

Report ID 

1 

0x03 

Feature Report ID 

1 

Report Subtype 

1  

0x07 

Indicates a reset request 

2 bResetType 1 

0x01 
0x02 

Soft Reset 
Hard Reset 

3--7  

5  0 

Not 

used 

A Hard Reset will cause the controller to re-enumerate. 

In the case of a Soft Reset, after sending the command, the controller will acknowledge 
(ACK) the transfer, but the command will not yet be completed. Before sending any 
other commands, the host should poll with GetStatus until the command status field 
returns “Soft Reset Occurred,” “Command Complete,” or “Fail”.  Any timeout for this 
status polling should be 2 seconds minimum.