146 lines
4.8 KiB
C++
146 lines
4.8 KiB
C++
/***************************************************
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This is our touchscreen painting example for the Adafruit ILI9341 Breakout
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----> http://www.adafruit.com/products/1770
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Check out the links above for our tutorials and wiring diagrams
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These displays use SPI to communicate, 4 or 5 pins are required to
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interface (RST is optional)
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Adafruit invests time and resources providing this open source code,
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please support Adafruit and open-source hardware by purchasing
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products from Adafruit!
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Written by Limor Fried/Ladyada for Adafruit Industries.
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MIT license, all text above must be included in any redistribution
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****************************************************/
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/** NOT FOR USE WITH THE TOUCH SHIELD, ONLY FOR THE BREAKOUT! **/
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#include <Adafruit_GFX.h> // Core graphics library
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#include <SPI.h>
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#include <Adafruit_ILI9341_STM.h>
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#include "TouchScreen.h"
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// These are the four touchscreen analog pins
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#define YP A2 // must be an analog pin, use "An" notation!
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#define XM A3 // must be an analog pin, use "An" notation!
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#define YM 5 // can be a digital pin
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#define XP 4 // can be a digital pin
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// This is calibration data for the raw touch data to the screen coordinates
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#define TS_MINX 150
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#define TS_MINY 120
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#define TS_MAXX 920
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#define TS_MAXY 940
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#define MINPRESSURE 10
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#define MAXPRESSURE 1000
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// The display uses hardware SPI, plus #9 & #10
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#define TFT_CS 10
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#define TFT_DC 9
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Adafruit_ILI9341_STM tft = Adafruit_ILI9341_STM(TFT_CS, TFT_DC);
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// For better pressure precision, we need to know the resistance
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// between X+ and X- Use any multimeter to read it
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// For the one we're using, its 300 ohms across the X plate
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TouchScreen ts = TouchScreen(XP, YP, XM, YM, 300);
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// Size of the color selection boxes and the paintbrush size
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#define BOXSIZE 40
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#define PENRADIUS 3
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int oldcolor, currentcolor;
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void setup(void) {
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// while (!Serial); // used for leonardo debugging
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Serial.begin(9600);
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Serial.println(F("Touch Paint!"));
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tft.begin();
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tft.fillScreen(ILI9341_BLACK);
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// make the color selection boxes
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tft.fillRect(0, 0, BOXSIZE, BOXSIZE, ILI9341_RED);
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tft.fillRect(BOXSIZE, 0, BOXSIZE, BOXSIZE, ILI9341_YELLOW);
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tft.fillRect(BOXSIZE*2, 0, BOXSIZE, BOXSIZE, ILI9341_GREEN);
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tft.fillRect(BOXSIZE*3, 0, BOXSIZE, BOXSIZE, ILI9341_CYAN);
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tft.fillRect(BOXSIZE*4, 0, BOXSIZE, BOXSIZE, ILI9341_BLUE);
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tft.fillRect(BOXSIZE*5, 0, BOXSIZE, BOXSIZE, ILI9341_MAGENTA);
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// select the current color 'red'
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tft.drawRect(0, 0, BOXSIZE, BOXSIZE, ILI9341_WHITE);
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currentcolor = ILI9341_RED;
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}
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void loop()
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{
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// Retrieve a point
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TSPoint p = ts.getPoint();
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/*
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Serial.print("X = "); Serial.print(p.x);
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Serial.print("\tY = "); Serial.print(p.y);
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Serial.print("\tPressure = "); Serial.println(p.z);
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*/
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// we have some minimum pressure we consider 'valid'
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// pressure of 0 means no pressing!
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if (p.z < MINPRESSURE || p.z > MAXPRESSURE) {
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return;
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}
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// Scale from ~0->1000 to tft.width using the calibration #'s
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p.x = map(p.x, TS_MINX, TS_MAXX, 0, tft.width());
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p.y = map(p.y, TS_MINY, TS_MAXY, 0, tft.height());
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/*
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Serial.print("("); Serial.print(p.x);
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Serial.print(", "); Serial.print(p.y);
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Serial.println(")");
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*/
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if (p.y < BOXSIZE) {
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oldcolor = currentcolor;
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if (p.x < BOXSIZE) {
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currentcolor = ILI9341_RED;
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tft.drawRect(0, 0, BOXSIZE, BOXSIZE, ILI9341_WHITE);
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} else if (p.x < BOXSIZE*2) {
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currentcolor = ILI9341_YELLOW;
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tft.drawRect(BOXSIZE, 0, BOXSIZE, BOXSIZE, ILI9341_WHITE);
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} else if (p.x < BOXSIZE*3) {
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currentcolor = ILI9341_GREEN;
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tft.drawRect(BOXSIZE*2, 0, BOXSIZE, BOXSIZE, ILI9341_WHITE);
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} else if (p.x < BOXSIZE*4) {
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currentcolor = ILI9341_CYAN;
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tft.drawRect(BOXSIZE*3, 0, BOXSIZE, BOXSIZE, ILI9341_WHITE);
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} else if (p.x < BOXSIZE*5) {
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currentcolor = ILI9341_BLUE;
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tft.drawRect(BOXSIZE*4, 0, BOXSIZE, BOXSIZE, ILI9341_WHITE);
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} else if (p.x < BOXSIZE*6) {
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currentcolor = ILI9341_MAGENTA;
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tft.drawRect(BOXSIZE*5, 0, BOXSIZE, BOXSIZE, ILI9341_WHITE);
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}
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if (oldcolor != currentcolor) {
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if (oldcolor == ILI9341_RED)
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tft.fillRect(0, 0, BOXSIZE, BOXSIZE, ILI9341_RED);
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if (oldcolor == ILI9341_YELLOW)
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tft.fillRect(BOXSIZE, 0, BOXSIZE, BOXSIZE, ILI9341_YELLOW);
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if (oldcolor == ILI9341_GREEN)
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tft.fillRect(BOXSIZE*2, 0, BOXSIZE, BOXSIZE, ILI9341_GREEN);
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if (oldcolor == ILI9341_CYAN)
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tft.fillRect(BOXSIZE*3, 0, BOXSIZE, BOXSIZE, ILI9341_CYAN);
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if (oldcolor == ILI9341_BLUE)
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tft.fillRect(BOXSIZE*4, 0, BOXSIZE, BOXSIZE, ILI9341_BLUE);
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if (oldcolor == ILI9341_MAGENTA)
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tft.fillRect(BOXSIZE*5, 0, BOXSIZE, BOXSIZE, ILI9341_MAGENTA);
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}
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}
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if (((p.y-PENRADIUS) > BOXSIZE) && ((p.y+PENRADIUS) < tft.height())) {
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tft.fillCircle(p.x, p.y, PENRADIUS, currentcolor);
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}
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}
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