Tasmota/lib/lib_display/XPT2046_Touchscreen/XPT2046_Touchscreen.h

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/* Touchscreen library for XPT2046 Touch Controller Chip
* Copyright (c) 2015, Paul Stoffregen, paul@pjrc.com
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice, development funding notice, and this permission
* notice shall be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef _XPT2046_Touchscreen_h_
#define _XPT2046_Touchscreen_h_
#include "Arduino.h"
#include <SPI.h>
#if defined(__IMXRT1062__)
#if __has_include(<FlexIOSPI.h>)
#include <FlexIOSPI.h>
#endif
#endif
#if ARDUINO < 10600
#error "Arduino 1.6.0 or later (SPI library) is required"
#endif
class TS_Point {
public:
TS_Point(void) : x(0), y(0), z(0) {}
TS_Point(int16_t x, int16_t y, int16_t z) : x(x), y(y), z(z) {}
bool operator==(TS_Point p) { return ((p.x == x) && (p.y == y) && (p.z == z)); }
bool operator!=(TS_Point p) { return ((p.x != x) || (p.y != y) || (p.z != z)); }
int16_t x, y, z;
};
class XPT2046_Touchscreen {
public:
constexpr XPT2046_Touchscreen(uint8_t cspin, uint8_t tirq=255)
: csPin(cspin), tirqPin(tirq) { }
bool begin(SPIClass &wspi = SPI);
#if defined(_FLEXIO_SPI_H_)
bool begin(FlexIOSPI &wflexspi);
#endif
TS_Point getPoint();
bool tirqTouched();
bool touched();
void readData(uint16_t *x, uint16_t *y, uint8_t *z);
bool bufferEmpty();
uint8_t bufferSize() { return 1; }
void setRotation(uint8_t n) { rotation = n % 4; }
// protected:
volatile bool isrWake=true;
private:
void update();
uint8_t csPin, tirqPin, rotation=1;
int16_t xraw=0, yraw=0, zraw=0;
uint32_t msraw=0x80000000;
SPIClass *_pspi = nullptr;
#if defined(_FLEXIO_SPI_H_)
FlexIOSPI *_pflexspi = nullptr;
#endif
};
#ifndef ISR_PREFIX
#if defined(ESP8266)
#define ISR_PREFIX ICACHE_RAM_ATTR
#elif defined(ESP32)
// TODO: should this also be ICACHE_RAM_ATTR ??
#define ISR_PREFIX IRAM_ATTR
#else
#define ISR_PREFIX
#endif
#endif
#endif