83
6.4.33 Touch Panel Calibration Method (2-point System)
The power supply controller supports 2-point touch panel calibration. Figure 6.11shows the points of the
drawing coordinates and A/D conversion coordinates that are necessary for calibration.
Figure 6.11 Points of the Drawing Coordinates and A/D Conversion Coordinates
T-Engine Board
LCD
Point A
Point B
Origin of A/D
convertion
coordinates
A
/D
c
o
n
v
er
si
o
n
c
o
o
rd
in
a
te
s:
x
a
x
is
Origin of
drawing
coordinates
Drawing coordinates: x
axis
D
ra
w
in
g
c
o
o
rd
in
at
es
: y
a
x
is
SW1
SW2
SW3
A/D conversion
coordinates: x axis