I have have had my display for a little while now, but never tried the touch.
So thought I should try mine. It appears to work.
So far I just tried it with the polling, which worked, so had a little fun and
did a quick and dirty conversion of the Adafruit GFX example touchpaint
that they have for several of their displays.
In this case I started from their ILI9341 library....
/***************************************************
This is our touchscreen painting example for the Adafruit ILI9341 Shield
----> http://www.adafruit.com/products/1651
Check out the links above for our tutorials and wiring diagrams
These displays use SPI to communicate, 4 or 5 pins are required to
interface (RST is optional)
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
Written by Limor Fried/Ladyada for Adafruit Industries.
MIT license, all text above must be included in any redistribution
****************************************************/
REDIRECT_STDOUT_TO(Serial)
#include "Arduino_GigaDisplay_GFX.h"
#include "Arduino_GigaDisplayTouch.h"
GigaDisplay_GFX display;
Arduino_GigaDisplayTouch touchDetector;
#include "Arduino_GigaDisplay_GFX.h"
#define GC9A01A_CYAN 0x07FF
#define GC9A01A_RED 0xf800
#define GC9A01A_BLUE 0x001F
#define GC9A01A_GREEN 0x07E0
#define GC9A01A_MAGENTA 0xF81F
#define GC9A01A_WHITE 0xffff
#define GC9A01A_BLACK 0x0000
#define GC9A01A_YELLOW 0xFFE0
// The buffer used to rotate and resize the frame
// Size of the color selection boxes and the paintbrush size
#define BOXSIZE 80
#define PENRADIUS 5
int oldcolor, currentcolor;
void setup(void) {
// while (!Serial); // used for leonardo debugging
Serial.begin(9600);
Serial.println(F("Touch Paint!"));
display.begin();
if (touchDetector.begin()) {
Serial.print("Touch controller init - OK");
} else {
Serial.print("Touch controller init - FAILED");
while (1)
;
}
display.fillScreen(GC9A01A_BLACK);
// make the color selection boxes
display.fillRect(0, 0, BOXSIZE, BOXSIZE, GC9A01A_RED);
display.fillRect(BOXSIZE, 0, BOXSIZE, BOXSIZE, GC9A01A_YELLOW);
display.fillRect(BOXSIZE * 2, 0, BOXSIZE, BOXSIZE, GC9A01A_GREEN);
display.fillRect(BOXSIZE * 3, 0, BOXSIZE, BOXSIZE, GC9A01A_CYAN);
display.fillRect(BOXSIZE * 4, 0, BOXSIZE, BOXSIZE, GC9A01A_BLUE);
display.fillRect(BOXSIZE * 5, 0, BOXSIZE, BOXSIZE, GC9A01A_MAGENTA);
// select the current color 'red'
display.drawRect(0, 0, BOXSIZE, BOXSIZE, GC9A01A_WHITE);
currentcolor = GC9A01A_RED;
}
void loop() {
uint8_t contacts;
GDTpoint_t points[5];
contacts = touchDetector.getTouchPoints(points);
if (contacts == 0) return;
// Retrieve a point
int touch_x = points[0].x;
int touch_y = points[0].y;
/*
Serial.print("X = "); Serial.print(touch_x);
Serial.print("\tY = "); Serial.print(touch_y);
Serial.print("\tPressure = "); Serial.println(p.z);
*/
// Scale from ~0->4000 to display.width using the calibration #'s
// touch_x = map(touch_x, TS_MINX, TS_MAXX, 0, display.width());
// touch_y = map(touch_y, TS_MINY, TS_MAXY, 0, display.height());
/*
Serial.print("("); Serial.print(touch_x);
Serial.print(", "); Serial.print(touch_y);
Serial.println(")");
*/
if (touch_y < BOXSIZE) {
oldcolor = currentcolor;
if (touch_x < BOXSIZE) {
currentcolor = GC9A01A_RED;
display.drawRect(0, 0, BOXSIZE, BOXSIZE, GC9A01A_WHITE);
} else if (touch_x < BOXSIZE * 2) {
currentcolor = GC9A01A_YELLOW;
display.drawRect(BOXSIZE, 0, BOXSIZE, BOXSIZE, GC9A01A_WHITE);
} else if (touch_x < BOXSIZE * 3) {
currentcolor = GC9A01A_GREEN;
display.drawRect(BOXSIZE * 2, 0, BOXSIZE, BOXSIZE, GC9A01A_WHITE);
} else if (touch_x < BOXSIZE * 4) {
currentcolor = GC9A01A_CYAN;
display.drawRect(BOXSIZE * 3, 0, BOXSIZE, BOXSIZE, GC9A01A_WHITE);
} else if (touch_x < BOXSIZE * 5) {
currentcolor = GC9A01A_BLUE;
display.drawRect(BOXSIZE * 4, 0, BOXSIZE, BOXSIZE, GC9A01A_WHITE);
} else if (touch_x < BOXSIZE * 6) {
currentcolor = GC9A01A_MAGENTA;
display.drawRect(BOXSIZE * 5, 0, BOXSIZE, BOXSIZE, GC9A01A_WHITE);
}
if (oldcolor != currentcolor) {
if (oldcolor == GC9A01A_RED)
display.fillRect(0, 0, BOXSIZE, BOXSIZE, GC9A01A_RED);
if (oldcolor == GC9A01A_YELLOW)
display.fillRect(BOXSIZE, 0, BOXSIZE, BOXSIZE, GC9A01A_YELLOW);
if (oldcolor == GC9A01A_GREEN)
display.fillRect(BOXSIZE * 2, 0, BOXSIZE, BOXSIZE, GC9A01A_GREEN);
if (oldcolor == GC9A01A_CYAN)
display.fillRect(BOXSIZE * 3, 0, BOXSIZE, BOXSIZE, GC9A01A_CYAN);
if (oldcolor == GC9A01A_BLUE)
display.fillRect(BOXSIZE * 4, 0, BOXSIZE, BOXSIZE, GC9A01A_BLUE);
if (oldcolor == GC9A01A_MAGENTA)
display.fillRect(BOXSIZE * 5, 0, BOXSIZE, BOXSIZE, GC9A01A_MAGENTA);
}
}
if (((touch_y - PENRADIUS) > BOXSIZE) && ((touch_y + PENRADIUS) < display.height())) {
display.fillCircle(touch_x, touch_y, PENRADIUS, currentcolor);
}
}
