TFT touch screen text highlighted

Projects Programming
1

Hello all, I need some help with learning to program the TFT touch screen. I have a SSD1289 screen with a shield for the Mega 2560. The UTFT and Utouch libraries have been installed and the example sketch works ok. I have also run the calibration sketch and updated the configuration file.
My program is below, which is a very basic one. First page has a blue button which when pressed will then display the power page. On the power page there is a title and home text. The home text if operated will take me back to the first page.
I have two problems. The first is when I go to the power Page the text is still highlighted blue. Even though I have cleared the screen. How can I stop the text being highlighted.
The other problem is the touch can be out by a long way on some uploads. Where the button is top left I sometimes have to touch center of screen to change pages. If I upload the sketch a few times this on some occasions it all works ok. I am running on USB so is this a power issue or known problem with these screens.
Any help would be great thanks

#include <UTFT.h>
#include <UTouch.h>

UTFT    myGLCD(SSD1289,38,39,40,41);

UTouch  myTouch( 6, 5, 4, 3, 2);

// Declare which fonts we will be using
extern uint8_t SmallFont[];
extern uint8_t BigFont[];
extern uint8_t SevenSegNumFont[];

int x, y;
char currentPage;

void setup(){
  myGLCD.InitLCD();
  myGLCD.clrScr();
  myTouch.InitTouch();
  myTouch.setPrecision(PREC_MEDIUM);
  myGLCD.setBackColor(0, 0, 255);
  drawHomePage();  
  currentPage = '0';
}

void loop(){
  if (currentPage == '0'){
    if (myTouch.dataAvailable()){
      myTouch.read();
      x=myTouch.getX();
      y=myTouch.getY();
          if ((y>=10) && (y<=60) && (x>=10) && (x<=60)) { //button pressed
            myGLCD.clrScr();
            powerPageDraw(); 
            currentPage = '1';
         }
      }
    }
  // POWER PAGE 
  if (currentPage == '1'){
     if(myTouch.dataAvailable()){
      myTouch.read();
      x=myTouch.getX();
      y=myTouch.getY();
        if ((x>=10) && (x<=60) && (y>=10) && (y<=20)) {
        currentPage = '0';
        drawHomePage();
      }
    }
  }
}

void powerPageDraw(){
  myGLCD.clrScr ();
  myGLCD.setColor(255, 255, 255); //set color to white
  myGLCD.setFont(SmallFont);
  myGLCD.print("Home",10, 10);
  myGLCD.print("Power Supplies",60, 10);
}

void drawHomePage(){
  myGLCD.clrScr ();
  myGLCD.setColor(0, 0, 255);
  myGLCD.fillRoundRect (10, 10, 60, 60);
}
2 
  myGLCD.setColor(255, 255, 255); //set color to white

We can see that the function sets the color to white. The comment is useless. But, the color of WHAT? That would be useful information.

Similarly, what, exactly, do these do?

  myTouch.setPrecision(PREC_MEDIUM);
  myGLCD.setBackColor(0, 0, 255);
3

set color to white is to set the text color to white.

setBackColor should set the background color to black on setup.

As for the setPrecision I don't know yet. this was is part of a tutorial I was following and I did not remove this.

4

Paul thanks for pointing this out. I released the background color was wrong. Changed this to

myGLCD.setBackColor(0, 0, 0);

Now blue highlight has gone.

Also commented out the following

myTouch.setPrecision(PREC_MEDIUM);

and so far the screen has behaved correct on each upload.

thanks

5

After 5 uploads the screen is still playing up. Can take 2 or 3 loads of the same sketch to get the touch to work in the correct place.

Not sure yet if this is a program error or the way its flashing to the arduino