iotouch::ResistiveTouchInterrogator Class Reference

#include <ResistiveTouchScreen.h>

Inheritance diagram for iotouch::ResistiveTouchInterrogator:

Public Member Functions
	ResistiveTouchInterrogator (pinid_t xpPin, pinid_t xnPin, pinid_t ypPin, pinid_t ynPin)
TouchState	internalProcessTouch (float *ptrX, float *ptrY, const TouchOrientationSettings &rotation, const CalibrationHandler &calibrator) override

Detailed Description

This class handles the basics of a touch screen interface, capturing the values and converting them into a usable form, it is pure abstract and the sendEvent needs implementing with a suitable implemetnation for your needs. It is heavily based on the Adafruit TouchScreen library but modified to work with AnalogDevice so that it can work reliably across a wider range of devices.

Important notes

• all the GPIOs used must be OUTPUT capable, this matters on some boards such as ESP32
• Y+ and X- must be connected to ADC (analog input capable) pins.
• it uses taskManager and takes readings at the millisecond interval provided.

Member Function Documentation

internalProcessTouch()

TouchState iotouch::ResistiveTouchInterrogator::internalProcessTouch ( float *  ptrX, float *  ptrY, const TouchOrientationSettings &  settings, const CalibrationHandler &  calib  )

overridevirtual

called by the touch screen manager to get the latest touch information.

Parameters

ptrX	a pointer to be populated with the X position between 0 and 1
ptrY	a pointer to be popualted with the Y position between 0 and 1
rotation	the rotation of the display, one of the above.
calib	the calibration handler that can be used to adjust the values before returning from this method

Returns

the touch state after this call

Implements iotouch::TouchInterrogator.

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The documentation for this class was generated from the following files:

• src/ResistiveTouchScreen.h
• src/ResistiveTouchScreen.cpp