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Table 4 :List of configurable parameters for touch library usage.
Symbol / Constant
name
_QMATRIX_
QT_NUM_CHANNELS
NUM_X_LINES
NUM_Y_LINES
_ROTOR_SLIDER_
QT_MAX_NUM_ROTO
RS_SLIDERS
QT_DELAY_CYCLES
NUM_X_PORTS
PORT_X_1
PORT_NUM_1
PORT_X_2
PORT_NUM_2
PORT_X_3
PORT_NUM_3
PORT_YA
PORT_YB
PORT_SMP
SMP_PIN
_ATXMEGA_
Range of values
Symbol defined to indicate
QMatrix acquisition method is
required
The number of channels the
library supports.( Possible
values:4,8,16,32,56,64).
Note: 56 channel for only
ATxmega Devices.
The number of X lines the
library supports.( Possible
values:4,8)
The number of Y lines the
library supports.( Possible
values:1,2,4,7,8)
Note: 7 Y-lines for only
ATxmega Devices)
Symbol defined if Rotor and/or
slider is required
Maximum number of
rotors/sliders the library
supports( possible
values:0,2,4,8)
Possible values
:1,2,3,4,5,10,25,50
Number of ports on which the
X lines needs to be spread.
(Possible values 1,2,3)
First IO port for configuring the
X lines.Any IO port available
with the device.
1
Second IO port for configuring
the X lines. Any IO port
available with the device.
2
Third IO port for configuring
the X lines. Any IO port
available with the device.
3
Any IO port available with the
device.
ADC port available for the
device.
Any IO port available with the
device.
Any IO port available with the
device.
Symbol defined if an ATxmega
Device is used for QMatrix
Comments
Define this symbol to indicate QMatrix
acquisition method is required
Value should be same as the number of
channels that the library supports
Value should be same as the number of X
lines that the library supports. Refer to
library selection guide
Value should be same as the number of Y
lines that the library supports. Refer to
library selection guide
Needs to be added in case user needs to
configure ROTOR/SLIDER
Needs to be removed for ALL KEYS
configuration
Subject to support for rotors/sliders in the
library selected.
Please refer to section 5.6.8
Maximum number of ports that the X lines
can spread is 3.
Note: Code memory required increases
with the increase in NUM_X_PORTS
Drive electrode for touch sensing using
QMatrix acquisition
Valid when NUM_X_PORTS =1,2,3
Please donot edit this macro
Valid when NUM_X_PORTS =1,2,3
Drive electrode for touch sensing using
QMatrix acquisition
Valid when NUM_X_PORTS =2,3
Please donot edit this macro
Valid when NUM_X_PORTS =2,3
Drive electrode for touch sensing using
QMatrix acquisition
Valid when NUM_X_PORTS =3
Please donot edit this macro
Valid when NUM_X_PORTS =3
Receive electrode for touch sensing using
QMatrix acquisition
Receive electrode for touch sensing using
QMatrix acquisition
Port of the Sampling pin for touch sensing
using QMatrix acquisition
Sampling pin for touch sensing using
QMatrix acquisition
Needs to be added if the device to be
supported is ATxmegaxxxx
sensing technology
57
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