Difference between revisions of "1.28inch LCD Module"

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*Pixel size: 0.135(H)x0.135(V)mm
*Pixel size: 0.135(H)x0.135(V)mm
*Dimension: 40.4×37.5(mm) Φ37.5(mm)
*Dimension: 40.4×37.5(mm) Φ37.5(mm)
{|border=1; style="width:700px;text-align:center" align="center";
|-style="background:#0000ff; color:white;" align="center"
|VCC||3.3V/5V Power input
|DIN||SPI data input
|CLK||SPI clock input
|CS||Chip selection, low active
|DC||Data/Command control
==LCD and the controller==
==LCD and the controller==

Revision as of 07:34, 9 June 2022

1.28inch LCD Module
1.28inch LCD Module

1.28inch LCD, SPI interfaces





1.28inch LCD Display Module, IPS Screen, 65K RGB Colors, 240×240 Resolution, SPI Interface



  • Operating voltage: 3.3V/5V
  • Interface: SPI
  • LCD type: IPS
  • Controller: GC9A01
  • Resolution: 240(H)RGB x 240(V)
  • Display size: Φ32.4mm
  • Pixel size: 0.135(H)x0.135(V)mm
  • Dimension: 40.4×37.5(mm) Φ37.5(mm)

LCD and the controller

  • The driver used in this LCD is GC9A01, with a resolution of 240RGB×240 dots and 129600 bytes of GRAM inside. This LCD supports 12-bits/16-bits/18-bits data bus by MCU interface, which are RGB444, RGB565, RGB666.
  • For most LCD controllers, the communication method of the controller can be configured, they are usually using 8080 parallel interface, 3-line SPI, 4-line SPI, and other communication methods. This LCD uses a 4-line SPI interface for reducing GPIO and fast speed.LCD
  • If you are wondering which point is the first pixel of the screen (because the screen is round), you can understand it as a square screen with an inscribed circle drawn in it, and it only displays the content in this inscribed circle. The pixels in other locations are simply discarded (just like most round smartwatches on the market)

Working Protocol

0.96inch lcd module spi.png
Note: Different from the traditional SPI protocol, the data line from the slave to the master is hidden since the device only has display requirement.
RESX Is the reset pin, it should be low when powering the module and be higher at other times;;
CSX is slave chip select, when CS is low, the chip is enabled.
D/CX is data/command control pin, when DC = 0, write command, when DC = 1, write data
SDA is the data pin for transmitting RGB data, it works as the MOSI pin of SPI interface;
SCL worka s the SCLK pins of SPI interface.
SPI communication has data transfer timing, which is combined by CPHA and CPOL.
CPOL determines the level of the serial synchronous clock at idle state. When CPOL = 0, the level is Low. However, CPOL has little effect to the transmission.
CPHA determines whether data is collected at the first clock edge or at the second clock edge of serial synchronous clock; when CPHL = 0, data is collected at the first clock edge.
There are 4 SPI communication modes. SPI0 is commonly used, in which CPHL = 0, CPOL = 0.

Using Raspberry Pi

Hardware connection

Please connect the LCD to your Raspberry Pi by the 8PIn cable according to the table below

Connect to Raspberry Pi
LCD Raspberry Pi
BCM2835 Board
VCC 3.3V 3.3V
CS CE0 24
DC 25 22
RST 27 13
BL 18 12

The color of actual cable may be different with the figure here, please connect them according to the pins instead of color.


Enable SPI interface

  • Open terminal, use command to enter the configuration page
sudo raspi-config
Choose Interfacing Options -> SPI -> Yes  to enable SPI interface

RPI open spi.png
Reboot Raspberry Pi:

sudo reboot

Please make sure that SPI interface was not used by other devices

Install Libraries

  • Install BCM2835 libraries
wget http://www.airspayce.com/mikem/bcm2835/bcm2835-1.68.tar.gz
tar zxvf bcm2835-1.68.tar.gz 
cd bcm2835-1.68/
sudo ./configure
sudo make
sudo make check
sudo make install
#For more details, please refer to http://www.airspayce.com/mikem/bcm2835/
  • Install wiringPi libraries
sudo apt-get install wiringpi

For the version of the Raspberry Pi system after May 2019 (the OS version earlier than this date doesn't need to be executed), an upgrade may be required:

wget https://project-downloads.drogon.net/wiringpi-latest.deb
sudo dpkg -i wiringpi-latest.deb
gpio -v
#You will get 2.52 information if you install it correctly
  • Install Python libraries
sudo apt-get update
sudo apt-get install python-pip
sudo apt-get install python-pil
sudo apt-get install python-numpy
sudo pip install RPi.GPIO
sudo pip install spidev
sudo apt-get update
sudo apt-get install python3-pip
sudo apt-get install python3-pil
sudo apt-get install python3-numpy
sudo pip3 install RPi.GPIO
sudo pip3 install spidev

Download Examples

Open Raspberry Pi terminal and run the following command

sudo apt-get install p7zip-full
sudo wget  https://www.waveshare.net/w/upload/a/a8/LCD_Module_RPI_code.7z
7z x LCD_Module_RPI_code.7z -O./LCD_Module_code
cd LCD_Module_code/RaspberryPi/

Run the demo codes

Please go into the RaspberryPi directory (demo codes) first and run the commands in terminal

C codes

  • Re-compile the demo codes
cd c
sudo make clean
sudo make -j 8

This examples are made for multi-dusplay, you can input the type of the LCD when using.

sudo ./main <<type of LCD>>

Use the command according to LCD::

sudo ./main 0.96
sudo ./main 1.14
sudo ./main 1.28
sudo ./main 1.3
sudo ./main 1.54
sudo ./main 1.8
sudo ./main 2


  • Enter the python directory and run ls -al
cd python/examples
ls -l

LCD rpi python examples.png
You can check all the files which are listed in type:

0inch96_LCD_test.py     0.96inch LCD example
1inch14_LCD_test.py 1.14inch LCD example
1inch28_LCD_test.py 1.28inch LCD example
1inch3_LCD_test.py 1.3inch LCD example
1inch54_LCD_test.py 1.54inchLCD example
1inch8_LCD_test.py 1.8inch LCD example
2inch_LCD_test.py 2inch LCD example
  • Run the example
# python2
sudo python 0inch96_LCD_test.py
sudo python 1inch14_LCD_test.py
sudo python 1inch28_LCD_test.py
sudo python 1inch3_LCD_test.py
sudo python 1inch54_LCD_test.py
sudo python 1inch8_LCD_test.py
sudo python 2inch_LCD_test.py
# python3
sudo python3 0inch96_LCD_test.py
sudo python3 1inch14_LCD_test.py
sudo python3 1inch28_LCD_test.py
sudo python3 1inch3_LCD_test.py
sudo python3 1inch54_LCD_test.py
sudo python3 1inch8_LCD_test.py
sudo python3 2inch_LCD_test.py

The examples are tested in Arduino UNO, if you want to use other versions of the Arduino, you need to change the connection according to the actual boards.

Using Arduino UNO

Hardware Connection

Arduino UNO连接引脚对应关系
CS D10

LCD driver hat to arduino connet.png

Run the example

Download the demo codes and unzip it. The Arduino project is located in ~/Arduino/…
LCD arduino cede1.png

Run the project according to the actual display type
1.28inch LCD Arduino.png
For examples: 1.54inch LCD Module. Enter the LCD_1inch54 directory and run the LCD_1inch54.ino file
Run the project and choose Arduino UNO as Board
LCD arduino cede3.png
Select the COM Port according to your Device Manager
LCD arduino cede4.png
Compile and download it to your board
LCD arduino cede5.png

Using STM32

Hardware Coonnection

The examples are based on STM32F103RBT6 as well as the connection table. If you want to use other MCU, you need to port the project and change the connection according to the actual hardware.

Connect to STM32F103RBT6
VCC 3.3V

Use Waveshare XNUCLEO-F103RB as examples

About the examples

The examples use HAL libraries. Download demo codes, unzip, and find the STM32 projects. Open LCD_demo.uvprojx which is located in STM32\STM32F103RBT6\MDK-ARM directory by Keil project

Open main.c file, you can configure the types for actual displays, recompile the project and download it to your board.

LCD_0in96_test()    0.96inch LCD example
LCD_1in14_test() 1.14inch LCD example
LCD_1in28_test() 1.28inch LCD example
LCD_1in3_test() 1.3inch LCD example
LCD_1in54_test() 1.54inch LCD example
LCD_1in8_test() 1.8inch LCD example
LCD_2in_test() 2inchLCDexample



demo codes

3D Drawing



If you require technical support, please go to the Support page and open a ticket.