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2. QTOUCH_STUDIO_MASKS needs to be enabled if using pin configurability .If not enabled
then, static pin mapping will work same as in the earlier versions of the libraries
5.8.2 Pin Configuration for QMatrix Acquisition Method
The QMatrix acquisition method libraries needs to be used after configuring X and YA and
YB lines on IO pins of the port as described in the configuration rules described in the
section below. The QTouch Studio Pin Configurator Wizard can be used to assign X, YA,
YB, SMP lines on the pins and rules are internally taken care in the Qtouch Studio Pin
Configurator Wizard.
The snippets can be taken from the QTouch Studio Pin Configurator Wizard and copied to
appropriate places in the main.c and touch_ config.h files in the example projects provided.
5.8.2.1
Configuration Rules:
1. The X lines can be configured on different ports up to a maximum of 3 ports
Ex: NUM_X_PORTS = 3 (maximum value supported). However the possible values
are NUM_X_PORTS = 1 or NUM_X_PORTS = 2 or NUM_X_PORTS = 3
2. The X lines can be configured on the three different ports.
3. The X lines can be configured on any pins of the ports selected above
Ex: X0 on PB2, X1 on PD5, X2 on PE0, X3 on PD1( when NUM_X_LINES= 4),
Provided that these pins do not conflict with the other pins for touch sensing or with the
host application usage.
4. The Y lines can be configured on the any of the pins of the ports selected
Ex: Any pins on the PORT_YA and PORT_YB selected.
Suppose, PORT_YA is D, and PORT_YB is C
Since, pin 5 and pin 1 PORTD are already used for X lines(X1, X3), the user can select
any of the remaining pins for Y0A lines. Suppose that Y0 is on pin2 and Y1 is on pin6
Hence, Y0A – PD2, Y0B – PC2, Y1A – PD6, Y1B – PC6,
5. All the Qmatrix usage Pins X lines,YA lines, YB lines and SMP line can be on same
port.Both YA and YB lines can share the same port. And the YA and YB need not be on
same corresponding pins of the ports.The Macro SHARED_YAYB should be defined as 1
if YA and YB are on same port else should be defined as 0.
6. The PORT_YB is fixed for each device and should be same as the PORT on which the
ADC input pins are available.
7. The SMP pin can be configured on any of the IO PORT pins available.
Ex:
PORT_SMP = D
SMP_PIN = 7 as this pin is not being used by touch sensing.
Note:
?
Please take care that the touch sensing pins do not conflict with other IO pins used by host
application
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