Sample Touch Keypad code for use with HXD8357D controller

Using Arduino Displays
#1

Hello Everyone,

Does anyone know of sample code that can be adapted to use with the HXD8357D controller? I purchased the Adafruit 3.5" TFT 320x480 + Touchscreen Breakout Board w/MicroSD Socket - HXD8357D and hoped I could find a keypad (0 - 9) that I liked, adapt it, and go from there, but no luck so far.

Failing that is there a good tutorial (read "for beginners") which outlines how to devlope touch screen interfaces?

Thanks in advance,

Zeus

#2

What library are you using to control the display?

#3

Good question. The following is directly from the code I was trying to use.

#include <SPI.h>
#include <Wire.h>
#include “Adafruit_GFX.h”
//#include “Adafruit_ILI9341.h”
#include “Adafruit_HX8357.h”
#include <SoftwareSerial.h>

#4

Hmmm, I was hoping it was the UTFT library.

Well you can create your own keypad with what you are give from the library.

This is not from the library you are using but you should be able to see how to make a keypad.

#include <Wire.h>
#include <ITDB02_Touch.h>
#include <ITDB02_Graph16.h>
#include <TFT_Extension_old.h>

// Declare which fonts we will be using
extern uint8_t SmallFont[];
extern uint8_t BigFont[];
//myGLCD(RS,WR,CS,RST,ALE,mode);
ITDB02 myGLCD(A1,A2,A0,A3,A5,ITDB32S);   //
ITDB02_Touch  myTouch(13,10,11,12,A4);

TFT_Extension_old myTFT(&myGLCD, &myTouch, LANDSCAPE);
char * text[4][3] = { 
  {"1","2","3"},
  {"4","5","6"},
  {"7","8","9"},
  {"*","0","#"}
};

char Pass[5];
char master[5] = "2651";
int Pcount=0;
int XC,YC;
int PassCounter=0;
byte orient = LANDSCAPE;

void setup()
{
  myGLCD.InitLCD(LANDSCAPE);
  myGLCD.setFont(SmallFont);
  myTouch.InitTouch(LANDSCAPE);
  myTouch.setPrecision(PREC_LOW);
  for(int line = 0; line <= 239; line++) // custom background color
  {
    myGLCD.setColor(0, 0, line);//text color White  
    myGLCD.drawLine(0, line, 319, line);
  }
  PassWord_makeButton();
  PassWord_buttonText();
  //RUN();
}

void loop()
{
  GetNum();
}

void RUN() 
{
  //  while(1) // Not using the Loop() function,
  //  {
  //    myTouch.read();
  //    int tx = myTouch.TP_X;
  //    int ty = myTouch.TP_Y;
  //    XC= constrain (map(tx, 205, 3900,0,239),0,239);
  //    YC= constrain (map(ty, 300, 3850,0,319),0,319);
  //    GetNum();
  //  }
}

void PassWord_makeButton()
{
  for(int y = 0; y < 300;y+=100)
  {
    for(int x = 0; x < 200; x+=50)
    {
      drawButton(20+x, 90+y, 50+x, 30+y); // this will draw the button on the screen by so many pixels 
    }
  }
  return;
}

void drawButton(int x1, int y1,int x2, int y2)
{
  myGLCD.setColor(170,170,170); // grey
  myGLCD.fillRoundRect(y1-3, x1+3, y2-3, x2+3);//Button Shading  

  myGLCD.setColor(255, 255, 255); // white
  myGLCD.fillRoundRect(y1, x1, y2, x2);// outter button color

  myGLCD.setColor(200,0,0); // red
  myGLCD.fillRoundRect(y1-5, x1+5, y2+5, x2-5);//inner button color
  return;
}

void PassWord_buttonText()
{ 
  myGLCD.setFont(BigFont);
  myGLCD.setBackColor(200, 0, 0);
  myGLCD.setColor(255,255,255);
  for(int tr = 0; tr < 300; tr+=100)
  {
    for(int tc = 0; tc < 200; tc+=50)
    {
      char *myText = text[tc/50][tr/100];
      myGLCD.print(myText, 52+tr, 27+tc, 0); //this will print the number into the center of the buttons
    }
  } 
}

void GetNum() 
{
  char *myText;
  for(int tr = 0; tr < 300; tr+=100)
  {
    for(int tc = 0; tc < 200; tc+=50)
    {
      myText = text[tc/50][tr/100];
      if(myTFT.TouchButton(90+tr, 20+tc, 30+tr, 50+tc)) // this check to see if any of the buttons were pressed, then it sends the corresponding number to the "check" function
        check(*myText);
    }
  }
}


void check(char pass) 
{
  myGLCD.setFont(BigFont);
  Pass[Pcount] = pass;  //store incoming numbers in an array
  myGLCD.print(Pass,CENTER, 1); // show the password as it is being entered

  if(Pcount == 3)// only when the array is filled, does it check the numbers
  {
    delay(1000);
    if(!strcmp(Pass, master)) // compare the password to the master password
    {
      myGLCD.print("GOOD",CENTER, 1);
      delay(1000);
      myGLCD.print("    ",CENTER, 1);
    }
    else
    {
      myGLCD.print("FAIL",CENTER, 1);
      delay(1000);
      myGLCD.print("    ",CENTER, 1);
    }
    clearPassword(); // Clear the password
  }
  
  Pcount++;
  if(Pcount > 3) // this ensure the count does not exceed the maximum lenght of the password
  {
    Pcount = 0; 
    PassCounter = 0;
  }
}

void clearPassword()
{
  byte i = 3;
  while(i != 0)
    Pass[i--] = NULL;
}
//boolean TouchButton(int x1, int y1, int x2, int y2, int xc, int yc){
//  if (orient==LANDSCAPE)
//  {
//    xc = xc ^ yc;
//    yc = xc ^ yc;
//    xc = xc ^ yc;
//  }
//
//  if (x1>x2)
//  {
//    x1 = x1 ^ x2;
//    x2 = x1 ^ x2;
//    x1 = x1 ^ x2;
//  }
//  if (y1>y2)
//  {
//    y1 = y1 ^ y2;
//    y2 = y1 ^ y2;
//    y1 = y1 ^ y2;
//  }
//
//  if(xc >= x1 && xc <= x2 && yc >= y1 && yc <= y2) return true;
//  return false;
//}
#5

Thank you, most kind. I will have to spend some time with it, but I will let you know how I make out soon.

#6