Arduino - Touch Screen TFT LCD Tutorial (First Review Before the Next Projects)

In this tutorial we will learn how to programming the TFT LCD Touch Screen. I used 2.8 TFT Touch Display ILI9325 Module and Arduino UnoR3 for this tutorial. The topics we will view in this tutorial, Required Libraries, Add Text, Text Color, Font Size, Print Text, Create Button, Button Click, Add Frame, Draw Rectangle and Background Color.

Required Hardware

Geekcreit® UNO R3 Board With 2.8 Inch TFT Touch Display Module - https://goo.gl/JZHV0n

Package included:

1 x 2.8 Inch TFT LCD Shield Touch Display Module

1 x UNO R3 ATmega328P Board with USB cable

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2.8 inch LCD TFT display

Bright, 4 white-LED backlight

Colorful, 18-bit 262,000 different shades

4-wire resistive touchscreen 240 x 320 pixels

No wiring, no soldering.

Simply plug it in and load library

On-board 3.3V 300mA LDO regulator

5V compatible, use with 3.3V or 5V logic

Support 2GB micro SD TF card

Size: 7.8 x 5.3cm

In this tutorial we will see the following topics

Required Libraries

Add Text Text Color

Font Size

Text Print

Insert Button

Button Click

Adding a Frame

Draw a Rectangle

Background Color

First we download the necessary library files - https://goo.gl/1Ri5KX

Then add the library files we downloaded to the "Arduino Library" folder Users -> YourUserName -> Documentation -> Arduino -> Libraries

Now, get the source code - https://goo.gl/1Ri5KX

If you are using the same display module, there are some fixed values and variables in the source code that the libraries use.

We will not change these values in next projects.

Of course, we will use our libraries first in every project.

Later, the pin definitions used by the LCD display.

Values found by screen calibration It will be enough to enter these values one time. (I will adjust the screen calibration)

Calibration of the Display

We will use the "touchscreendemo" example that comes with the library for calibration

File -> Examples -> TouchScreen -> touchscreendemo

Upload the example code to the Arduino

Then open the serial monitor

Click on the top left corner of the display and get the X and Y values

Then enter these values at these variables on the shared source code

X value = TS_MAXX

Y value = TS_MAXY

Click on the bottom right corner of the display and enter the values in the TS_MINX and TS_MINY variables

The display calibrated for shared source code and its ready to use

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