26
3M™ MicroTouch™ Controller RX181 Reference Guide
3M Touch Systems, Inc. Proprietary Information
Response
The device stalls endpoint 0 if it cannot process this request.
Set Feature - Set Controller Number
This command is used to get a controller number for application use. The controller does
not use this value. This process is useful for identifying individual controllers in a
multiple controller system.
Table 23. Set Controller Number Request
Offset
Field
Size
Value
Description
0 bmRequestType
1 0x21
Characteristics
1 bRequest 1 0x09
Command
number
2 wValue
2 0x0305
Parameter
number
4 wIndex
2 0x00
Not
used
6 wLength
2 0x48
Length
of
Parameter Data report
Table 24. Data Stage 1 (header data)
Offset
Field
Size
Value
Description
0
bReportID
1
0x05
Feature Report ID
1 bReport
Subtype
1
0x01
Indicates a set param report
2
bArea
1
0
Memory Area (always 0=Ctrl EEPROM)
3 Not
used 1 0 Not
used
4
bSubArea
1
0x05
Block number
5
bIndex
1
0x00
Index into block
6
bDataLength
1
0x04
Number of valid data bytes for this xfer
(always padded to 64)
7
Not used
1
0x00
Not used
Table 25. Data Stage 2 through 9 (8 * 8 data bytes)
Offset
Field
Size
Value
Description
0-7
wData 1
0xXX
4 bytes of data (trailing pad bytes are ignored )
Data Stage
The controller ID is in the first 4 bytes of data stage, the remaining bytes are padding.
Response
If the command cannot be processed, the device stalls endpoint 0. The command cannot
be processed if the memory area is not valid. It cannot be processed if the request is
attempting to access data that is outside the specified memory area. This may happen if
the index is too large or too much data has been requested.
