3M MicroTouch EX Series, Reference Manual

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28 3M™ MicroTouch™ Controller EX Serial Reference Guide
3M Touch Systems, Inc. Proprietary Information – TSD-29087 Rev D
MSB* Bits LSB*
Data Sequence 7 6 5 4 3 2 1 0
S Byte 1 1 S6 S5 S4 S3 S2 S1 S0
X Byte 2 0 X6 X5 X4 X3 X2 X1 X0
x Byte 3 0 X13 X12 X11 X10 X9 X8 X7
Y Byte 4 0 Y6 Y5 Y4 Y3 Y2 Y1 Y0
y Byte 5 0 Y13 Y12 Y11 Y10 Y9 Y8 Y7
*MSB = Most Significant Bit, LSB = Least Significant Bit
Table 11 defines the status bits (Byte 1) for the Format Tablet data.
Table 11 Format Tablet Status Bits
Bit Description Values
S0 – S5 Reserved —
S6 Proximity (touch state) 1 = Sensor is being touched (a touchdown or a continued touch).
0 = Sensor is not being touched (a touch liftoff or inactive).
When the proximity bit changes from 1 to 0 (touch liftoff), the
controller outputs one final set of X/Y coordinate data with the bit
equal to 0 and the X/Y coordinate data equal to the last touch point.
S7 Packet synchronization Always 1.
Mode Stream
Syntax:
<SOH>MS<CR>
Description:
Sends a continuous stream of X/Y coordinate data when you touch the sensor. The
controller continues to send data as long as you touch the sensor. 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.
Response: <SOH>0<CR> Positive response.
Name Command
Syntax:
<SOH>NM<CR>
Description:
This
command returns a string of characters to help identify the controller. The
string contains the controller model number and current firmware revision
number. The content and format of this command can change and therefore is not
intended for normal customer use.