2.4 inch Dokunmatik TFT Ekran

// 2.4inch Dokunmatik TFT Paint Uygulaması
// Proje Hocam - 2017
 
#include <Adafruit_GFX.h>    // GFX Kütüphanesi
#include <Adafruit_TFTLCD.h> // TFT Kütüphanesi
#include <TouchScreen.h>     // Dokunmatik Ekran Kütüphanesi
 
#if defined(__SAM3X8E__)
    #undef __FlashStringHelper::F(string_literal)
    #define F(string_literal) string_literal
#endif
 
#ifndef USE_ADAFRUIT_SHIELD_PINOUT 
// #error "This sketch is intended for use with the TFT LCD Shield. Make sure that USE_ADAFRUIT_SHIELD_PINOUT is #defined in the Adafruit_TFTLCD.h library file."
#endif
 
#define YP A2  // must be an analog pin, use "An" notation!
#define XM A3  // must be an analog pin, use "An" notation!
#define YM 8   // can be a digital pin
#define XP 9   // can be a digital pin
 
#ifdef __SAM3X8E__
  #define TS_MINX 125
  #define TS_MINY 170
  #define TS_MAXX 880
  #define TS_MAXY 940
#else
  #define TS_MINX  180
  #define TS_MINY  160
  #define TS_MAXX  880
  #define TS_MAXY  920
#endif
 
// For better pressure precision, we need to know the resistance
// between X+ and X- Use any multimeter to read it
// For the one we're using, its 300 ohms across the X plate
TouchScreen ts = TouchScreen(XP, YP, XM, YM, 300);
 
#define LCD_CS A3
#define LCD_CD A2
#define LCD_WR A1
#define LCD_RD A0
#define LCD_RESET A4
 
// Assign human-readable names to some common 16-bit color values:
#define BLACK   0x0000
#define BLUE    0x001F
#define RED     0xF800
#define GREEN   0x07E0
#define CYAN    0x07FF
#define MAGENTA 0xF81F
#define YELLOW  0xFFE0
#define WHITE   0xFFFF
 
 
Adafruit_TFTLCD tft(LCD_CS, LCD_CD, LCD_WR, LCD_RD, LCD_RESET);
//Adafruit_TFTLCD tft;
 
 
#define BOXSIZE   40
#define PENRADIUS  4
int oldcolor, currentcolor,swapxy;
 
void setup(void) {
  Serial.begin(9600);
  Serial.println(F("Paint!"));
 
  tft.reset();
 
  uint16_t identifier = 0x9341;
   
  if(identifier == 0x9325) {
    Serial.println(F("Found ILI9325 LCD driver"));
  } else if(identifier == 0x9341) {
    Serial.println(F("Found ILI9341 LCD driver"));
  } else if(identifier == 0x7575) {
    Serial.println(F("Found HX8347G LCD driver"));
  } else {
    Serial.print(F("Unknown LCD driver chip: "));
    Serial.println(identifier, HEX);
    return;
  }
 
  tft.begin(identifier);
 
  tft.fillScreen(BLACK);
 
  tft.fillRect(0, 0, BOXSIZE, BOXSIZE, RED);
  tft.fillRect(BOXSIZE, 0, BOXSIZE, BOXSIZE, YELLOW);
  tft.fillRect(BOXSIZE*2, 0, BOXSIZE, BOXSIZE, GREEN);
  tft.fillRect(BOXSIZE*3, 0, BOXSIZE, BOXSIZE, CYAN);
  tft.fillRect(BOXSIZE*4, 0, BOXSIZE, BOXSIZE, BLUE);
  tft.fillRect(BOXSIZE*5, 0, BOXSIZE, BOXSIZE, MAGENTA);
  // tft.fillRect(BOXSIZE*6, 0, BOXSIZE, BOXSIZE, WHITE);
  
  tft.drawRect(0, 0, BOXSIZE, BOXSIZE, WHITE);
  currentcolor = RED;
  
  pinMode(13, OUTPUT);
}
 
#define MINPRESSURE 10
#define MAXPRESSURE 1000
 
void loop()
{
  digitalWrite(13, HIGH);
  TSPoint p = ts.getPoint();
  digitalWrite(13, LOW);
 
  // if sharing pins, you'll need to fix the directions of the touchscreen pins
  //pinMode(XP, OUTPUT);
  pinMode(XM, OUTPUT);
  pinMode(YP, OUTPUT);
  //pinMode(YM, OUTPUT);
 
  // we have some minimum pressure we consider 'valid'
  // pressure of 0 means no pressing!
 
  if (p.z > MINPRESSURE && p.z < MAXPRESSURE) {
 
//need to reverse xy for some reason:
    swapxy=p.y;
    p.y=p.x;
    p.x=swapxy;
     
     
    Serial.print("X = "); Serial.print(p.x);
    Serial.print("\tY = "); Serial.print(p.y);
    Serial.print("\tPressure = "); Serial.println(p.z);
     
     
    if (p.y < (TS_MINY+15)) {
      Serial.println("erase");
      // press the bottom of the screen to erase 
      tft.fillRect(0, BOXSIZE, tft.width(), tft.height()-BOXSIZE, BLACK);
    }
     
    // scale from 0->1023 to tft.width
    p.x = map(p.x, TS_MINX, TS_MAXX,0, tft.width());
    p.y = map(p.y, TS_MINY, TS_MAXY,0, tft.height());
     
    Serial.print("("); Serial.print(p.x);
    Serial.print(", "); Serial.print(p.y);
    Serial.println(")");
     
 
    //Code below to fix the bug of inverted coordinates
   // p.x = map(p.x, TS_MINX, TS_MAXX, tft.width(),0 );
   // p.y = map(p.y, TS_MAXY, TS_MINY, 0, tft.height() );
   //p.y = map(p.y, TS_MINY, TS_MAXY, tft.height(), 0);
     
    //Correct offset of touch. Manual calibration
    
    if (p.y < BOXSIZE) {
       oldcolor = currentcolor;
 
       if (p.x < BOXSIZE) { 
         currentcolor = RED; 
         tft.drawRect(0, 0, BOXSIZE, BOXSIZE, WHITE);
       } else if (p.x < BOXSIZE*2) {
         currentcolor = YELLOW;
         tft.drawRect(BOXSIZE, 0, BOXSIZE, BOXSIZE, WHITE);
       } else if (p.x < BOXSIZE*3) {
         currentcolor = GREEN;
         tft.drawRect(BOXSIZE*2, 0, BOXSIZE, BOXSIZE, WHITE);
       } else if (p.x < BOXSIZE*4) {
         currentcolor = CYAN;
         tft.drawRect(BOXSIZE*3, 0, BOXSIZE, BOXSIZE, WHITE);
       } else if (p.x < BOXSIZE*5) {
         currentcolor = BLUE;
         tft.drawRect(BOXSIZE*4, 0, BOXSIZE, BOXSIZE, WHITE);
       } else if (p.x < BOXSIZE*6) {
         currentcolor = MAGENTA;
         tft.drawRect(BOXSIZE*5, 0, BOXSIZE, BOXSIZE, WHITE);
       }
 
       if (oldcolor != currentcolor) {
          if (oldcolor == RED) tft.fillRect(0, 0, BOXSIZE, BOXSIZE, RED);
          if (oldcolor == YELLOW) tft.fillRect(BOXSIZE, 0, BOXSIZE, BOXSIZE, YELLOW);
          if (oldcolor == GREEN) tft.fillRect(BOXSIZE*2, 0, BOXSIZE, BOXSIZE, GREEN);
          if (oldcolor == CYAN) tft.fillRect(BOXSIZE*3, 0, BOXSIZE, BOXSIZE, CYAN);
          if (oldcolor == BLUE) tft.fillRect(BOXSIZE*4, 0, BOXSIZE, BOXSIZE, BLUE);
          if (oldcolor == MAGENTA) tft.fillRect(BOXSIZE*5, 0, BOXSIZE, BOXSIZE, MAGENTA);
       }
    }
    if (((p.y-PENRADIUS) > BOXSIZE) && ((p.y+PENRADIUS) < tft.height())) {
      tft.fillCircle(p.x, p.y, PENRADIUS, currentcolor);
    }
  }
}