AR1000 Datasheet, PDF (28/37 Pages) Microchip Technology – Resistive Touch Screen Controller

9) Software to display the second calibration point target in the upper right quadrant of the display and prompt
the user to touch and release the target.
Touch and
release target
10) Wait for the user to touch and release the second calibration point target. Do this by looking for a controller
response of: <0x55><0x02><0x00><0x14>
11) Software to display the third calibration point target in the lower right quadrant of the display and prompt the
user to touch and release the target.
Touch and
release target
12) Wait for the user to touch and release the third calibration point target. Do this by looking for a controller
response of: <0x55><0x02><0x00><0x14>
13) Software to display the fourth calibration point target in the lower left quadrant of the display and prompt the
user to touch and release the target.
Touch and
release target
14) Wait for the user to touch and release the fourth calibration point target. Do this by looking for a controller
response of: <0x55><0x02><0x00><0x14>
15) Enable touch reporting by issuing <Enable Touch> command.
Send
Receive
: <0x55><0x01><0x12>
: <0x55><0x02><Response><0x12>
DS41393A-Page 24
© 2009 Microchip Technology, Inc.