3M SC400 Serial Resistive, Reference Manual

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22 SC400 Controller Reference Guide
3M Touch Systems Proprietary Information
Get Controller Number
Syntax: <SOH> Q002 <CR>
Response: <SOH> XXXXXXXX <CR> Where each X is a hexadecimal digit, most significant digit
first.
Description: This command is used to get a controller number for applications use. The controller does
not use this value. This is useful for identifying individual controllers in a multiple
controller system.
Mode Stream
Syntax: <SOH> MS <CR>
Response: <SOH> 0 <CR> Positive response.
The controller will respond with ACK for compatibility with older controllers. This
format is the only format supported by this controller.
Description: Sends a continuous stream of X/Y coordinate data when you touch the screen. The
controller continues to send data as long as you touch the screen. The controller sends the
data even if the touch is stationary and unchanging.
The format of the coordinate data depends on the last format command received by the
controller.
Null Command
Syntax: <SOH> Z <CR>
Response: <SOH> 0 <CR> Positive response.
Description: Queries the controller and waits for a response.
Use Z to determine that you are communicating with the controller or to make sure that a
utility is communicating with the controller. Using this command does not affect the
controller’s current operating parameters.
Output Identity
Syntax: <SOH> OI <CR>
Response: <SOH> CcXxxx <CR>
where:
Cc = Two ASCII characters that describe the type of 3M Touch Systems controller.
Xxxx = This is a unique identifier not necessarily the actual firmware revision number.
Description: Returns a 6-character identifier, which describes the controller type and the firmware
version number. The output identity for the
SC400
controller is SC Xxxx .