3M? Multi-touch Display M2256PW User Guide 29
3M Touch Systems, Inc. Proprietary Information – 37531 Rev D
APPENDIX B
3M? PX Serial Controller Communications
This appendix is intended for software developers only and discusses the fundamentals
of communicating with the 3M? PX serial controller. The firmware commands, which
are usually issued by a driver or utility program on the host system, control the operation
of the controller; however developers can enter these commands directly. This appendix:
?
Describes the controller default settings.
?
Lists the recommended firmware commands for current development.
?
Describes how to use each of these commands.
?
References additional commands developers may need to use.
The description of each command includes the command syntax, the default value, how
the command works, and the expected response from the controller.
Overview of Firmware Commands
Developers may use these commands when writing touch applications, developing
custom drivers or touch configurations, or testing their touch systems. Developers can
issue commands to initialize the controller, select operating modes, and execute
diagnostic functions.
Note:
This document assumes you are familiar with standards and modes of
communication with serial devices, as well as firmware commands and how to use them.
Executing some commands may alter the performance of your sensor and render it
inoperable. You should be aware of the results before executing any firmware
commands.
To optimize the performance of the 3M? PX controller and simplify the development of
custom drivers, 3M Touch Systems recommends you use the commands listed in this
appendix for current development.
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