lcdgfx v1.3.0 ships a templated XPT2046 resistive-touch driver in src/touch/xpt2046.h. The driver is transport-agnostic: any class exposing begin(), end(), and transfer(uint8_t) works.

Wiring

XPT2046	MCU pin (typical)
`T_CLK`	SPI SCK
`T_DIN`	SPI MOSI
`T_DO`	SPI MISO
`T_CS`	any GPIO
`T_IRQ`	any GPIO (optional, falling-edge)

T_CS may safely be the same physical CS as a non-XPT slave on the same bus as long as you select only one device at a time. The driver uses 2.5 MHz SPI mode 0.

Minimal example

#include "lcdgfx_xpt2046.h"   // pulled in by lcdgfx_gui.h
LcdGfxXpt2046<SPI> touch(/*cs*/ 8, /*irq*/ 9);
void setup() {
    touch.begin();
    touch.setCalibration({ /*ax*/ 0.072f, /*bx*/ -16.0f,
                           /*ay*/ 0.085f, /*by*/ -12.0f,
                           /*swap*/ false, /*invert_x*/ false,
                           /*invert_y*/ false,
                           /*w*/ 240, /*h*/ 320 });
}
void loop() {
    if (touch.isPressed()) {
        int16_t x, y;
        if (touch.read(x, y)) menu.onTouch(x, y);
    }
}

TouchCalibration performs a per-axis affine transform (`x' = ax * raw + bx`) followed by optional axis swap, axis invert, and output clamping. A 3-point or 5-point calibration helper is not shipped — pick three on-screen targets, record the raw samples, and solve for ax/bx.

See examples/gui/touch_demo for a full sketch.