I used this code here, but i just tried to see how it works, I took it from paint
code that i used to experiment:
#include "TFTLCD.h"
#include "TouchScreen.h"
#define YP A1 // must be an analog pin, use "An" notation!
#define XM A2 // must be an analog pin, use "An" notation!
#define YM 1 // can be a digital pin
#define XP 2 // can be a digital pin
#define TS_MINX 150
#define TS_MINY 120
#define TS_MAXX 920
#define TS_MAXY 940
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
#define LCD_RESET A5
// 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);
void setup(void) {
pinMode(13, OUTPUT);
tft.initDisplay();
tft.fillScreen(BLACK);
pinMode(13, OUTPUT);
}
#define MINPRESSURE 10
#define MAXPRESSURE 1000
void loop()
{
tft.fillRect(50,50,50,50,BLUE);
if (p.y > 50 && p.y < 50 && p.x > 50 && p.x < 50){
//toggle the state of the LED
if (LED_3_State == HIGH){
digitalWrite(13, RELAY_ON);
Tft.fillCircle(219, 120, 16,GREEN);
LED_3_State = LOW;
}
i found some examples in other codes , it was just to see, to try to learn how it works
Code that goes with the library as example (it is just paint)
#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
#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);
if (identifier == 0x9325) {
Serial.println("Found ILI9325");
} else if (identifier == 0x9328) {
Serial.println("Found ILI9328");
} else {
Serial.print("Unknown driver chip ");
Serial.println(identifier, HEX);
while (1);
}
*/
tft.initDisplay();
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);
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, 0, tft.width());
p.y = map(p.y, TS_MINY, TS_MAXY, 0, tft.height());
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);
}
}
}
So i tries with other libraries but id doesen t work just with this one, Paint doesen t work good , X Coordinate is inverted.
I tried to figure it out how it works via paint but i block.