UTOUCH what am i missing

Projects Programming
1

Hi
Trying to get this working but i only receve x319 y239 from serial and touchscreen don`t react on touch.
Any advice??
pins are all digital.

//TOUCH//  
#include <UTouch.h>
UTouch  myTouch( 6, 5, 4, 3, 2);

int x, y;

void setup()
{
  Serial.begin(9600);

  myTouch.InitTouch(LANDSCAPE);
  myTouch.setPrecision(PREC_LOW);

}
void loop()
{
  if (myTouch.dataAvailable())
    delay(100);
  {

    myTouch.read();
    x=myTouch.getX();
    y=myTouch.getY();
    Serial.print("x: ");
    Serial.print(x);
    Serial.print(" y: ");
    Serial.println(y);
    delay(100);
  }
}
2 
  if (myTouch.dataAvailable())
    delay(100);
  {

    myTouch.read();
    x=myTouch.getX();
    y=myTouch.getY();

You're reading data whether or not there's data to read - is that intentional?

3

No Awol, this is taken out of the original example, so instead of floading serial with data it prints only when touched

4

Magic things just happend...
for some reason this started to print correct data

//TOUCH//  
#include <UTouch.h>
UTouch  myTouch( 6, 5, 4, 3, 2);

int x, y;

void setup()
{
  Serial.begin(9600);

  myTouch.InitTouch(LANDSCAPE);
  myTouch.setPrecision(PREC_LOW);

}
void loop()
{
  if (myTouch.dataAvailable())
    
  { 
    myTouch.read();   
    x=myTouch.getX();
    y=myTouch.getY();
    Serial.print("x: ");
    Serial.print(x);
    Serial.print(" y: ");
    Serial.println(y);
    delay(100);
  }
}
5

An IF statement will do whatever comes immediately after it.

So,

if (myTouch.dataAvailable())
delay(100); <= this is the first thing the compiler sees after the IF statement

{ <= from here down, is not governed by the IF statement
myTouch.read();
x=myTouch.getX();
y=myTouch.getY();
Serial.print("x: ");
Serial.print(x);
Serial.print(" y: ");
Serial.println(y);
delay(100);
}

However with this,

if (myTouch.dataAvailable())

{ <= this is what the compiler sees after the IF statement, so it will do everything in the brackets
myTouch.read();
x=myTouch.getX();
y=myTouch.getY();
Serial.print("x: ");
Serial.print(x);
Serial.print(" y: ");
Serial.println(y);
delay(100);
}

6

aaa:)
another great lesson.

7

ok, while the previous code for the touch it self works fine, it don`t make much effect while the screen is running.
Am i having conflict here??

#include <SPI.h> 
#include <ILI9341_due_gText.h>
#include <ILI9341_due.h>

#include "fonts\Arial_bold_14.h"

#include <UTouch.h>
UTouch  myTouch( 6, 5, 4, 3, 2);

#define TFT_CS 53
#define TFT_DC 9
#define TFT_RESET 8
ILI9341_due myTFT(TFT_CS, TFT_DC, TFT_RESET);

int x, y;

void setup()
{
  Serial.begin(9600);

  myTouch.InitTouch(LANDSCAPE);
  myTouch.setPrecision(PREC_LOW);

  bool result = myTFT.begin();

  Serial.print("TFT begin successful: ");
  Serial.println(result ? "YES" : "NO");

  myTFT.fillScreen(ILI9341_BLUE);
  myTFT.setRotation(iliRotation270);

  ILI9341_due_gText t1(&myTFT);
  t1.defineArea(100, 110, 220, 130);
  t1.selectFont(Arial_bold_14);
  t1.setFontLetterSpacing(5);
  t1.setFontColor(ILI9341_WHITE, ILI9341_BLUE);
  t1.drawString("Hello World", gTextAlignMiddleCenter);
}

void loop()
{

  {
    if (myTouch.dataAvailable())

    { 
      myTouch.read();   
      x=myTouch.getX();
      y=myTouch.getY();
      Serial.print("x: ");
      Serial.print(x);
      Serial.print(" y: ");
      Serial.println(y);
      delay(100);
    }
  }
}
8

You need to clean up your code.

void loop()
{
    if (myTouch.dataAvailable())
    { 
      myTouch.read();   
      x=myTouch.getX();
      y=myTouch.getY();
      Serial.print("x: ");
      Serial.print(x);
      Serial.print(" y: ");
      Serial.println(y);
      delay(100);
    }
}
9

Isnt that the case to share spi?

10

UTouch doesn't use SPI, it just needs those 5 pins that you set in the constructor.

BTW, that library requires you to calibrate the touch pad. Were you able to do so?

11

i didnt have to do it to use without the tft. as soon as you ad utouch to the spi screen y axis has no responze and x someimes print 155 no matter where you touch. So wired

12

I went thru and tried to get some answer and when myTFT.begin(); is in the code than the touch starts to be inoperative.