3M Touch Screen Controller EX 111 Reference Manual page 22

22
Offset
7
9
11
POC Status – The status of the Power On Checks. Various controller systems are checked
at power-up. If any failures in these systems are detected, a POC flag is set. The POC
status field reports the state of these flags. The POC status information is also flashed on
the controller's LED. The number of flashes generated for a given error is one more than
the error's bit number. Refer to Table 3 for further details. This is a 2-byte bitmapped
field.
Note: Issuing a Status Request will suppress displaying the cable NOVRAM error (bit 6)
on the LED. Even though the error is suppressed, it will continue to flash on the LED
until the sensor is touched.
Cmd Status – The status for the last command request. This field is used to determine
whether the last request was processed successfully. It is also used to track the progress
of a multi-stage request, such as 2-point calibration. The Status Request does not affect
the contents of this field, i.e., successful or unsuccessful processing of a previous status
request does not cause the command status field to be updated.
Table 11. Valid Command Status Field Entries
Response
0
1
2
3
4
5
Touch Status – Status information for the most recent touch coordinate.
Table 12. Touch Status
Bit Number
0
1 - 7
Async reports – the only active asynchronous report is the Touch Coordinate report 1.
Extended POC Status – This is additional power on status information. This is a 2-byte
bitmapped field.
Field Size
Reserved 2
Extended POC 2
Status
Reserved 9
Description
Failure in command processing
Command being processed
Stage 1 processing complete (for multi-stage commands)
Command complete
Soft reset occurred
Hard reset occurred
Description
1 if the sensor is being touched
Reserved
3M Touch Systems, Inc. Proprietary Information -- 29489v05
3M™ MicroTouch™ Controller EX USB Reference Guide
Value Description
0xXXXX Reserved
0xXXXX Additional Power On Check
Status
9 bytes Reserved