3M C3266PW User's Guide download pdf (Page 37)

3M™ Multi-Touch Chassis Display User Guide 37

3M Touch Systems, Inc. Proprietary Information – TSD-39373B

Table 14. Restore Defaults - Data Stage

Offset Field Size Value Description

0 Report ID 1 0x03 Feature Report ID

1 Report Subtype 1 0x08 Restore Defaults

2-7 6 0 Not used

After sending this 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 “Command Complete”

or “Fail”. Any timeout for this status polling should be 2 seconds minimum.

Asynchronous Reports

Coordinate Data – Multi-Touch Digitizer mode Async Report 0x13

This is used to transfer the coordinate data to the host. This report, when activated, is

sent to the host whenever new data is available or scheduled for transmission. It is an

asynchronous report that is activated by default at power up.

The report shown supports up to 6 simultaneous touches. Note that if more than 6

touches were to be supported, Report 0x13 would be sent as many times as necessary to

accommodate the number of fingers touching. Only the first Report 0x13 will have a non-

zero actual count. Each valid touch is marked with an ID number that remains the same

from touchdown through liftoff. The ID number can be any value from 0 to 255. Ignore

all other data within a touch report structure with a status marked “not valid”.

The coordinate system is Upper Left origin.

Table 15. Coordinate Data Report 0x13 --Data Stage

Offset Field Size Value Description

0 Report ID 1 0x13 Report ID

1 Touch Report 10 See table 16 Touch Report Structure

11 Touch Report 10 See table 16 Touch Report Structure

21 Touch Report 10 See table 16 Touch Report Structure

31 Touch Report 10 See table 16 Touch Report Structure

41 Touch Report 10 See table 16 Touch Report Structure

51 Touch Report 10 See table 16 Touch Report Structure

61 Actual Count 1 1 to 60 Number of valid touch reports

62 Not used 1 0

63 Not used 1 0

1 2 ... 32 33 34 35 36 37 38 39 40 41 42 ... 53 54

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3M C3266PW User's Guide Page 37