#include "TFTLCD.h"
#include "TouchScreen.h"
//Duemilanove/Diecimila/UNO/etc ('168 and '328 chips) microcontoller:
#define YP A1 // must be an analog pin, use "An" notation!
#define XM A2 // must be an analog pin, use "An" notation!
#define YM 7 // can be a digital pin
#define XP 6 // can be a digital pin
#define TS_MINX 150
#define TS_MINY 120
#define TS_MAXX 920
#define TS_MAXY 940
// 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
// optional. (optional means, that you can just connect the LCD_RESET pin to the RESET of your arduino. it works, without changing the code. I need the A4 pin, so I changed this to #define LCD_RESET A6 , because it has to have a value and there are no pins left. it works like this.
#define LCD_RESET A4
// Color definitions
#define BLACK 0x0000
#define BLUE 0x001F
#define RED 0xF800
#define GREEN 0x07E0
#define CYAN 0x07FF
#define MAGENTA 0xF81F
#define YELLOW 0xFFE0
#define WHITE 0xFFFF
TFTLCD tft(LCD_CS, LCD_CD, LCD_WR, LCD_RD, LCD_RESET);
#define BOXSIZE 40
#define PENRADIUS 3
int oldcolor, currentcolor;
void setup(void) {
Serial.begin(9600);
Serial.println("Paint!");
tft.reset();
uint16_t identifier = tft.readRegister(0x0);
tft.initDisplay();
tft.fillScreen(BLACK);
tft.fillRect(0, 320-BOXSIZE, BOXSIZE, 320,MAGENTA );
tft.fillRect(BOXSIZE, 320-BOXSIZE, BOXSIZE, 320,BLUE );
tft.fillRect(BOXSIZE*2, 320-BOXSIZE, BOXSIZE, 320,CYAN );
tft.fillRect(BOXSIZE*3, 320-BOXSIZE, BOXSIZE, 320, GREEN);
tft.fillRect(BOXSIZE*4, 320-BOXSIZE, BOXSIZE, 320, YELLOW);
tft.fillRect(BOXSIZE*5, 320-BOXSIZE, BOXSIZE, 320, RED);
// 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);
Point p = ts.getPoint();
digitalWrite(13, LOW);
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) {
if (p.y < (TS_MINY-5)) {
Serial.println("erase");
// press the bottom of the screen to erase
tft.fillRect(0, BOXSIZE, tft.width(), tft.height()-BOXSIZE, BLACK);
}
// turn from 0->1023 to tft.width
p.x = map(p.x, TS_MINX, TS_MAXX, tft.width(), 0);
p.y = map(p.y, TS_MINY, TS_MAXY, tft.height(), 0);
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,MAGENTA );
// if (oldcolor == YELLOW) tft.fillRect(BOXSIZE, 0, BOXSIZE, BOXSIZE,BLUE );
// if (oldcolor == GREEN) tft.fillRect(BOXSIZE*2, 0, BOXSIZE, BOXSIZE,CYAN );
// if (oldcolor == CYAN) tft.fillRect(BOXSIZE*3, 0, BOXSIZE, BOXSIZE, GREEN);
// if (oldcolor == BLUE) tft.fillRect(BOXSIZE*4, 0, BOXSIZE, BOXSIZE, YELLOW);
// if (oldcolor == MAGENTA) tft.fillRect(BOXSIZE*5, 0, BOXSIZE, BOXSIZE, RED);
// }
}
if (((p.y-PENRADIUS) > BOXSIZE) && ((p.y+PENRADIUS) < tft.height())) {
tft.fillCircle(240-p.x, 320-p.y, PENRADIUS, currentcolor);
}
}
}
this code is working with my arduino due and uno, if i use the shield. the library is TFTLCD (posted).
there is one seller on ebay writing that this shield doesnt work with mega, because of different pins! so test it with an uno, if you can. good luck!
