3M M2256PW manual Get Copyright, Mode Down Up, Mode Inactive, Mode Stream

3M™ Multi-touch Display M2256PW User Guide 35

The illustration below shows the coordinates of the calibration targets and display corners. The corners show the video coordinates in parentheses and the touch screen coordinates in brackets. Note that the touch screen coordinates for the serial interface have their origin in the lower-left corner.

(0, 0) [0, 16383]	(1679, 0) [16383, 16383]
		Upper Right Calibration Target
	(1469, 131)
		X = 1679 – (1680 x 1/8) = 1679 – 210 = 1469
		Y = 0 + (1050 x 1/8) = 0 + 131 = 131

Lower Left Calibration Target
X = 0 + (1680 x 1/8) = 0 + 210	= 210
Y = 1049 - (1050 x 1/8) = 1049 - 131	= 918	(210, 918)

(0, 1049) [0, 0] (1679, 1049) [16383, 0]

Get Copyright

Syntax:	<SOH>Q101<CR>
Response:	<SOH>Copyright © 2010 3M. All rights reserved.<CR>
Description:	This command is used to get copyright information.

Mode Down Up

Syntax:	<SOH>MDU<CR>
Response:	<SOH>0<CR> Positive response.
Description:	Limits touch reports to touchdown and liftoff events only.

Mode Inactive

Syntax: <SOH>MI<CR>

Response: <SOH>0<CR> Positive response.

Description: Turns off touch reports.

Mode Stream

Syntax:	<SOH>MS<CR>
Response:	<SOH>0<CR> Positive response.
	The controller will respond with acknowledge (ACK) for compatibility. This format is
	the only format supported by this controller.

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