3M Touch Screen Controller RX181, Справочное руководство

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24 3M™ MicroTouch™ Controller RX181 Reference Guide
3M Touch Systems, Inc. Proprietary Information
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.
Table 16. Power On Status
Bit
Number LED
Flashes Description
0 1 Not used
1 2 Program code checksum error
2 3 Not used
3 4 Block 1 parameters invalid (using defaults)
4 5 Power-up connector voltages are out of range
5 6 Not used
6 7 Not used
7 8 Controller linearization data invalid
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 calibration. The Status Request does not affect the
contents of this field, i.e., successful/unsuccessful processing of a previous status request
does not cause the command status field to be updated.
Table 17. Command Status Field Entries
Response Description
0 Failure in command processing
1 Command being processed
2 Stage 1 processing complete (for multi-stage commands).
3 Command complete
4 Soft reset occurred
5 Hard reset occurred
6 Stage 2 processing complete (for multi-stage commands)
7 Not used
Touch Status – Status information for the most recent coordinate. Information includes
whether the sensor is currently being touched.
Table 18. Power On Check Bit Fields
Bit Number Description
0 1 if the sensor is being touched
1 Always 0
Set Feature - Reset
This is a request to perform a controller reset.