3M™ Multi-touch Display M2256PW User Guide

37

3M Touch Systems recommends that the host system issue a Reset command whenever the host system is powered on and is attempting to establish communication with the controller.

The amount of time needed to execute a Reset command is typically 500 milliseconds with a defined maximum of 2000 milliseconds. Therefore, the application program should wait and be sure it receives the command response before issuing another command to the controller following the reset.

Restore Defaults

Syntax:

<SOH>RD<CR>

 

 

Response:

<SOH>0<CR> Positive response.

 

 

Description:

Returns to the factory default operating parameters. The Restore Defaults command

 

copies the 3M Touch Systems factory default parameters from ROM to the non-volatile

 

memory (NOVRAM) and then executes a Reset command.

 

The following table lists the factory defaults for the PX controller. The Restore Defaults

 

command is useful in situations where inadvertent commands to the controller have

 

rendered the sensor inoperative.

 

 

 

Table 18 PX Factory Default Settings

 

 

 

 

 

 

 

Operating Parameter

Default

 

 

 

 

Baud Rate

115,200

 

 

Serial Communication Settings

N, 8, 1

 

 

Data Format

Format Tablet Multitouch

 

 

Operating Mode

Mode Stream

 

 

Return to Factory Calibration

Yes

 

Note: After you issue a Restore Defaults command, you must recalibrate your sensor.

Unit Type

<SOH>UT<CR>

Responds with an 8-character identity string. This string identifies the type of controller currently attached to the system, lists the features supported by the controller, and outputs the status of the controller hardware (a self-test code).

Returns an identification code up to 8 ASCII characters in the following format:

<SOH>TtFfffSs<CR>

where:

Tt

= Two ASCII characters that identify the controller type.

3M Touch Systems, Inc. Proprietary Information – 37531 Rev D

Page 37
Image 37
3M M2256PW manual Restore Defaults, Unit Type, SOH Rdcr, Operating Parameter Default, Sohutcr