Set Feature - Reset; Set Feature - Restore Defaults - 3M Touch Screen USB Resistive Controller SC500 Reference Manual

SC500 USB Controller Communications

Set Feature - Reset

This is a request to perform a controller reset.
Table 19. Reset Request
Offset
0
1
2
4
6
Table 20. Data Stage
Offset
0
1
2
3
Response
The device stalls endpoint 0 if the request cannot be processed successfully. The
request cannot be processed if the reset type specified by the bResetType field is not
valid.

Set Feature - Restore Defaults

This is a request to restore the default values in the controller to the factory presets.
You must recalibrate after this command since this request will also default the
calibration and screen/display orientation.
Table 21. Restore Defaults Request
Offset
0
1
2
4
6
Field Size
bmRequestType 1
bRequest 1
wValue 2
wIndex 2
wLength 2
Field Size
bReport ID 1
bmReport 1
Subtype
bResetType 1
Not used 5
Field Size
bmRequestType 1
bRequest 1
wValue 2
wIndex 2
wLength 2
3M Touch Systems Proprietary Information
Value Description
0x21 Host to device
0x09 Set Report
0x0303 03 = Feature
03 = Feature Report ID
0 Always 0
8 Always 8
Value Description
0x03 Host to device
0x07 Indicates a reset request
0xXX 0x01=Soft reset
0 Not used
Value Description
0x21 Host to device
0x09 Set Report
0x0303 03 = Feature
03 = Feature Report ID
0 Always 0
8 Always 8
25