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98000332621

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16 3M™ MicroTouch™ Controller EX Serial Reference Guide
3M Touch Systems, Inc. Proprietary Information – TSD-29087 Rev D
Installing 3M™ MicroTouch™ Software
3M™ MicroTouch™ Software includes the driver that enables your sensor to work with
your computer. 3M Touch Systems has touch drivers for many operating systems,
including Windows® 7, Windows® Vista, Windows® XP, Windows® XP embedded,
Windows® CE, and Linux® (Kernel 6.2) (refer to the website for a complete listing).
You must be sure to install the correct software for your operating system.
3M™ MicroTouch™ Software includes a control panel for setting your sensor
preferences and a diagnostic utility. If you are experiencing problems with the sensor,
you can use the diagnostic utilities provided to locate the controller and test the sensor.
For more information on connecting your cables and installing and using the sensor
control panel and utilities, refer to the 3M™ MicroTouch™ Software User Guides
available on the corporate website at www.3Mtouch.com.
3M™ MicroTouch™ Controller EX Serial Reference Guide 17
3M Touch Systems, Inc. Proprietary Information – TSD-29087 Rev D
CHAPTER 3
3M™ MicroTouch™ EX Serial Controller
Communications
This chapter discusses the fundamentals of communicating with the 3M™
MicroTouch™ EX serial controller. The firmware commands, which are usually issued
by a driver or utility program on the host system, control the operation of the touch
controller, however developers can enter these commands directly. This chapter:
•
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.
Most sensor users do not have to use firmware commands to use their touch systems. For
example, users can use MT 7 software to calibrate the sensor or to determine the
controller type and firmware version.
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.
18 3M™ MicroTouch™ Controller EX Serial Reference Guide
3M Touch Systems, Inc. Proprietary Information – TSD-29087 Rev D
To optimize the performance of the 3M™ MicroTouch™ EX touch controller and
simplify the development of custom drivers, 3M Touch Systems recommends you use the
commands listed in this chapter for current development. Using these commands ensures
compatibility with all 3M™ MicroTouch™ controllers.
Controller Default Settings
Communication Parameters
The default operation of the EX serial controllers is N81 (no parity, 8 data bits, and 1
stop bits) at 9600 baud. Some EX1N2 controllers can be programmed to work with
even/odd parity, 7 data bits, and 1 or 2 stop bits.
Data Format
Data format refers to the type of packet the controller uses to send the X/Y touch
coordinates to the host system. Format Tablet is the default format for the 3M™
MicroTouch™ EX serial controller. In Format Tablet, the controller sends 5 bytes per
point and provides the most rapid response time to a touch.
•
Format Tablet is supported by all current 3M™ MicroTouch™ touch controllers.
•
It is the standard for current 3M Touch Systems product development and is the
format used by all touch drivers written by 3M Touch Systems.
Refer to the Format Tablet command in the firmware reference section. Note that 3M
MicroTouch Software automatically sets communications parameters to N81.
Operating Mode
The operating mode specifies the conditions under which the controller sends the X/Y
touch coordinates (input data packet) to the host system.
Mode Stream is the default operating mode for the EX serial controller. In Mode Stream,
the controller sends a continuous stream of data packets when the sensor is touched. The
controller sends the data as long as a touch continues on the sensor.
Because Mode Stream sends touch data continually, it is the most versatile mode, and it
provides the best response time and overall feel.
3M Touch Systems recommends that the touch driver generate an interrupt as each
packet in the data stream arrives. Because touchdown and liftoff events are specially
coded, your software can generate mouse events that correspond to what the user is
doing. This enables instant feedback and prevents data loss.
Communicating with the Controller
This section provides information on sending firmware commands to the controller and
interpreting the responses that the controller returns.
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98000332621

Mfr. #:
Buy 98000332621
Manufacturer:
3M
Description:
TOUCH SCREEN CAPACITIVE 19.73"
Lifecycle:
New from this manufacturer.
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