Please note that the following example is run on Raspberry Pi 4

Hardware Connection

• 15PIN Connector

Enable SPI & I2C Interface

• Open the Raspberry Pi terminal and input the following commands to enter the config interface:
  

sudo raspi-config

• Select Interface Options -> SPI -> Yes to enable the SPI interface

• Continue to enter the config interface:
  

sudo raspi-config

• Select Interface Options -> I2C -> Yes to enable the I2C interface

• Reboot the Raspberry Pi
  

sudo reboot

• Check /boot/config.txt, you can see "dtparam=i2c_arm=on" and "dtparam=spi=on" are written
  

more  /boot/config.txt

• To ensure that SPI is not occupied, it is recommended that other driver overlays be temporarily turned off. You can use ls /dev/spi* to check the SPI occupancy. The terminal output /dev/spidev0.0 and /dev/spidev0.1 indicates that the SPI situation is normal

ls /dev/spi* 

Python Environment

Install Libraries

• Install libraries:

sudo apt-get update
sudo apt-get install python3-pip
sudo apt-get install python3-pil
sudo apt-get install python3-numpy
sudo apt-get install python3-spidev

Demo Operations

• Download the following demo:

cd
wget https://files.waveshare.com/wiki/2inch%20Capacitive%20Touch%20LCD/2inch_Capacitive_Touch_LCD_Demo_Pi.zip

• Install decompression environment (optional, skip this step if you have used the command to unzip):

sudo apt-get install unzip

• Enter the file location, and execute the command to unzip:

unzip 2inch_Capacitive_Touch_LCD_RaspberryPi.zip -d ./2inch_Capacitive_Touch_LCD

• Enter Python file folder:

cd 2inch_Capacitive_Touch_LCD/Python

• Run the sample demo and you can see the LCD displays three pictures, and then input:

python 2inch_Capacitive_Touch_LCD.py

C Environment

Install Libraries

• Install libraries:

git clone https://github.com/WiringPi/WiringPi
cd WiringPi
./build
gpio -v

• Run gpio -v and version 2.70 will appear. If it does not appear, there is an installation error
• Download the demo file
• Enter the file directory, and run the demo

Demo Operations

• Download the demo

cd
wget https://files.waveshare.com/wiki/2inch%20Capacitive%20Touch%20LCD/2inch_Capacitive_Touch_LCD_Demo_Pi.zip

• Install decompression environment (optional, skip this step if you have used the command to unzip)

sudo apt-get install unzip

• Enter the file location, and execute the command to unzip

unzip 2inch_Capacitive_Touch_LCD_RaspberryPi.zip -d ./2inch_Capacitive_Touch_LCD

• Enter C file folder

cd 2inch_Capacitive_Touch_LCD/C

• Clean compilation files and compile again

sudo make clean
sudo make -j

• Successfully compiled, run the example demo to perform RGB refresh on the screen, and it will then enter the drawing function upon completion

sudo ./main

Hardware Connection

• 15PIN connector

Python Environment

Preparation

1. Install Thonny (Thonny installation package)
2. Press the "BOOTSEL" key on the Raspberry Pi Pico, and release it after powering
3. A new disk will appear on your computer, extract the (Raspberry Pi Pico firmware) and copy the firmware (suffix uf2) to that disk (the disk will automatically disappear if the copy is successful)
4. Open Thonny, click on "Python x.x.x" at the bottom right, and select "Configure interpreter"
5. Select "Interpreter" in the pop-up window -> select "MicroPython (Raspberry Pi Pico)" as the interpreter -> select "Auto-detect port" as the port
6.Click on "Stop", and the Shell window will show "MicroPython v1.20.0-50-g786013d46 on 2023-05-04; Raspberry Pi Pico with RP2040 Type "help()" for more information. " It means the connection is successful
The following is the procedure for points 4 and 5:

The successful connection is shown below:

Demo

• Download the Demo.
• Unzip the sample demo and open Thonny
• Open the sample file, the path is: 2inch_Capacitive_Touch_LCD_Demo_Pico/Python/2inch_Capacitive_Touch_LCD.py

• Run the demo to achieve the drawing board function on the screen

• If you want to run the demo automatically at power-on, change the file name to main.py