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SC400 Controller Communications
Reset
Syntax:
<SOH>R<CR>
Response:
<SOH>0<CR>
Description:
Initializes the hardware and the firmware, causes the controller to stop sending data, and
recalculates the environmental conditions (for example, stray and offset values). The
Reset command also cancels the Format Raw, Calibrate Raw, and Calibrate Extended
commands and returns the controller to normal operation.
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 ranges from 225 milliseconds to
800 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>
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.
Table 6 lists the factory defaults for the SC400 controller. The Restore Defaults
command is useful in situations where inadvertent commands to the controller have
rendered the touch screen inoperative.
Table 6 SC400 Factory Default Settings
Operating Parameter
Baud Rate
Serial Communication Settings
Data Format
Operating Mode
Return to Factory Calibration
Note: After you issue a Restore Defaults command, you must recalibrate your touch screen.
Set Controller Number
Syntax:
<SOH>W002xxxxxx<CR> Where each x is a hexadecimal digit, most significant digit
first.
Response:
<SOH>0<CR>
Positive response
Positive response.
Default
9600
N, 8, 1
Format Tablet
Mode Stream
Yes
Positive response.
3M Touch Systems Proprietary Information
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