2.4inch LCD Display RTS

I. Introduction

1.1 Product Overview

This 2.4-inch resistive touch screen integrates display and touch functions. It employs the ILI9431 display driver chip and the XPT2046 touch controller chip, ensuring stable and reliable touch input while maintaining excellent display quality. The board's form factor matches the screen's dimensions, resulting in a compact structure ideal for integration into small devices with space constraints. The control interface uses a 1.25mm pitch 12-pin connector, facilitating system cabling and modular assembly, balancing connection stability with manufacturing convenience, providing an intuitive display and operational experience for devices.

1.2 Product Features

  • 2.4-inch LCD resistive touch screen, 320×240 resolution
  • Resistive touch controller chip XPT2046 enables touch interaction, allowing users to input and control directly on the screen
  • SPI communication interface
  • Built-in ILI9341 controller

1.3 Product Specifications

Dimensions

63mm(Length) ×44mm(width)

Resolution

320 × 240

Communication Interface

SPI

Active Area

48.96mm × 36.72mm

Display Color

RGB 262K

Display Driver Chip

ILI9341

Touch Controller Chip

XPT2046

Supply Voltage

3.3V / 5V

1.4 Module Resources

① LCD screen connector
②Control interface: 12-pin 1.25mm pitch connector

③M2.5 SMT brass standoff

I. Usage

2.1 Hardware Description

2.1.1 Interface Definition

Pin Name

Description

VCC

Power positive

GND

Power ground

MOSI

SPI data input

MISO

SPI data output

CLK

SPI clock signal

LCD_CS

LCD chip select

LCD_DC

LCD data/command select

LCD_RST

LCD reset signal

LCD_BL

LCD backlight control

TP_CS

Touch panel chip select

TP_BUSY

Touch panel busy signal

TP_IRQ

Touch panel interrupt

2.2 Arduino Demo Code

2.2.1 Connecting to Arduino UNO

Connect the module to an Arduino UNO according to the table below.

Module Pin

Arduino UNO

Description

5V

5V

Power Positive

GND

GND

Power Ground

CLK

D13

SPI Clock Signal

MISO

D12

SPI Data Output

MOSI

D11

SPI Data Input

LCD_CS

D10

LCD Chip Select

LCD_BL

D9

LCD Backlight Control

LCD_DC

D8

LCD Data/Command Select

LCD_RST

D7

LCD Reset Signal

TP_CS

D5

Touch Panel Chip Select

TP_IRQ

D4

Touch Panel Interrupt

TP_BUSY

D3

Touch Panel Busy Signal

2.2.2 Program Download

Select the board model and port number as shown in the figures below:

After selection, click Compile, then upload the code to the Arduino UNO.You will see the screen display lines, rectangles, filled blocks, circles, and characters, then enter the touch function display interface, as shown below.
  • The "CALIB" button is used for screen calibration. The screen calibration parameters are pre-filled in the TP_Init() function. Users can update the values of tp_dev.xfac and tp_dev.yfac based on their own calibration results. After successful calibration, the message "Touch screen calibration confirmed!" will appear on the screen. If calibration fails, the process will restart. If the user does not perform the calibration operation within 10 seconds, the calibration process will automatically exit.
  • The "Clear" button is used to clear the screen drawing board content, erasing all content drawn by the user on the drawing board.
  • The red, green, blue, black, and yellow square buttons are used for the pen color. The default pen color is black. If the user wants to change the color, they can press the corresponding color square button and then draw.

III. Related Links

  • Demo
  • SCH