3M EX II 3000SP 用户手册
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EX II 3000SP Controller Reference Guide
3M Touch Systems Proprietary Information
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 format for the EX
II 3000SP controller operating at 8 data bits only.
touch coordinates to the host system. Format Tablet is the format for the EX
II 3000SP controller operating at 8 data bits only.
•
Format Tablet uses only 5 bytes per point and provides a rapid response time.
•
Format Tablet includes a status byte. The status byte contains information on
whether the X/Y coordinate is generated from a touchdown, a touch
continuation (when the finger is resting on the screen), or a touch liftoff.
whether the X/Y coordinate is generated from a touchdown, a touch
continuation (when the finger is resting on the screen), or a touch liftoff.
•
Format Tablet is supported by all current 3M Touch Systems touch screen
controllers.
controllers.
•
Format Tablet is the standard for current 3M Touch Systems product
development and is the format used by all touch screen drivers written by 3M
Touch Systems.
development and is the format used by all touch screen drivers written by 3M
Touch Systems.
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.
sends the X/Y touch coordinates (input data packet) to the host system.
Mode Stream is the default operating mode for the EX II 3000SP controller.
In Mode Stream, the controller sends a continuous stream of data packets
when the screen is touched. The controller sends the data as long as a touch
continues on the sensor.
In Mode Stream, the controller sends a continuous stream of data packets
when the screen 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.
mode, and it provides the best response time and overall feel.
3M Touch Systems recommends that the touch screen driver generate an
event 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.
event 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.
Communicating with the Controller
This section provides information on sending firmware commands to the
controller and interpreting the responses that the controller returns.
controller and interpreting the responses that the controller returns.
The EX II 3000SP command set is compatible with the TP4+ controller and
should not require modifications of existing software when replacing an
older controller.
should not require modifications of existing software when replacing an
older controller.
The commands listed in Table 3 are those that 3M Touch Systems currently
uses for development. 3M Touch Systems recommends that you use only
these commands for EX II 3000SP controller development.
uses for development. 3M Touch Systems recommends that you use only
these commands for EX II 3000SP controller development.