Template: 1.44inch LCD HAT User Manual
Working with Raspberry Pi
Enable SPI interface
- Open terminal, use command to enter the configuration page
sudo raspi-config Choose Interfacing Options -> SPI -> Yes to enable SPI interface
Reboot Raspberry Pi:
sudo reboot
Please make sure the SPI is not occupied by other devices, you can check in the middle of /boot/config.txt
Install Library
If you use the bookworm system, you can only use lgpio library, bcm2835 and wiringPi can't be installed and used.
BCM2835
#Open the Raspberry Pi terminal and run the following command wget http://www.airspayce.com/mikem/bcm2835/bcm2835-1.71.tar.gz tar zxvf bcm2835-1.71.tar.gz cd bcm2835-1.71/ sudo ./configure && sudo make && sudo make check && sudo make install # For more, you can refer to the official website at: http://www.airspayce.com/mikem/bcm2835/
WiringPi
#Open the Raspberry Pi terminal and run the following command cd sudo apt-get install wiringpi #For Raspberry Pi systems after May 2019 (earlier than that can be executed without), an upgrade may be required: wget https://project-downloads.drogon.net/wiringpi-latest.deb sudo dpkg -i wiringpi-latest.deb gpio -v # Run gpio -v and version 2.52 will appear, if it doesn't it means there was an installation error # Bullseye branch system using the following command: git clone https://github.com/WiringPi/WiringPi cd WiringPi . /build gpio -v # Run gpio -v and version 2.70 will appear, if it doesn't it means there was an installation error
lgpio
#Open the Raspberry Pi terminal and run the following command wget https://github.com/joan2937/lg/archive/master.zip unzip master.zip cd lg-master sudo make install # You can refer to the official website for more: https://github.com/gpiozero/lg
Python
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 spidev
Download Examples
Open the Raspberry Pi terminal and run the following command:
sudo apt-get install p7zip-full -y wget https://files.waveshare.com/upload/f/fa/1.44inch-LCD-HAT-Code.7z 7z x 1.44inch-LCD-HAT-Code.7z sudo chmod 777 -R 1.44inch-LCD-HAT-Code cd 1.44inch-LCD-HAT-Code/RaspberryPi/
Test Program
C codes
cd c sudo make clean make sudo ./main
For Raspberry Pi 4B and the system later than raspbian_lite-2019-06-20, you need to set it as follows, and the key can be input normally.
sudo nano /boot/config.txt #Add the following: gpio=6,19,5,26,13,21,20,16=pu
python
cd python sudo python main.py sudo python key_demo.py
FBCP Driver
The Framebuffer uses a memory area to store the display content and changes the data in the memory to change the display content.
There is an open-source project on github: fbcp-ili9341. Compared with other fbcp projects, this project uses partial refresh and DMA to achieve a refresh rate of up to 60fps.
Compile and Run
sudo apt-get install cmake -y cd ~ wget https://files.waveshare.com/upload/1/18/Waveshare_fbcp.zip unzip Waveshare_fbcp.zip cd Waveshare_fbcp mkdir build cd build
If you are using 1.44inch_LCD_HAT:
cmake -DSPI_BUS_CLOCK_DIVISOR=20 -DWAVESHARE_1INCH44_LCD_HAT=ON -DBACKLIGHT_CONTROL=ON -DSTATISTICS=0 ..
If you are using 1.3inch_LCD_HAT:
cmake -DSPI_BUS_CLOCK_DIVISOR=20 -DWAVESHARE_1INCH3_LCD_HAT=ON -DBACKLIGHT_CONTROL=ON -DSTATISTICS=0 ..
Then
make -j sudo ./fbcp
Auto-start when Power on
sudo cp ~/waveshare_fbcp/build/fbcp /usr/local/bin/fbcp sudo nano /etc/rc.local
And then add fbcp& before exit 0, as the picture below.
Set the Display Resolution
Set the user interface display size in the /boot/config.txt file.
sudo nano /boot/config.txt
Then add the following lines at the end of the config.txt.
hdmi_force_hotplug=1 hdmi_cvt=300 300 60 1 0 0 0 hdmi_group=2 hdmi_mode=87 display_rotate=0
【Note】If you are using Raspberry Pi 4B, you need to comment out the following lines on the [pi4] part. The modification is as below:
[pi4] # Enable DRM VC4 V3D driver on top of the dispmanx display stack #dtoverlay=vc4-fkms-v3d #max_framebuffers=2
And then reboot the system
sudo reboot
The final display effect is scaled and displayed on the 1.3-inch LCD in proportion. The setting of the resolution here should be slightly larger than the LCD resolution, the too high resolution will cause the font display to be blurred.
After rebooting the system, the Raspberry Pi OS user interface will be displayed.
Analog Mouse
There is a joystick and three buttons on the panel of the module, which we can use to control the mouse of the Raspberry Pi.
- Install the library, then download and run the demo.
#python2 sudo apt-get install python-xlib sudo pip install PyMouse wget https://files.waveshare.com/upload/d/d3/Mouse.7z 7z x Mouse.7z sudo python mouse.py #python3 sudo apt-get install python3-xlib sudo pip3 install PyMouse sudo pip3 install unix sudo pip3 install PyUserInput wget https://files.waveshare.com/upload/d/d3/Mouse.7z 7z x Mouse.7z sudo python3 mouse.py
- 【Note】The mouse.py needs to run under the graphical interface, which will not run under the SSH login. You can skip this step directly, the Pi will run the demo automatically by booting up.
- If you are using the Raspberry PI 4B and the version of your image is after raspbian_lite-2019-06-20, you need to set it as below:
sudo nano /boot/config.txt
And then add the following line at the end of the config.txt.
gpio=6,19,5,26,13,21,20,16=pu
Use the joystick to move up, down, left, and right, you can see that the mouse is moving.
- Set the auto-start when power on
Be careful not to add it to /etc/rc.local, because rc.local will be executed before the system enters the desktop, and if the PyMouse module runs on the command line interface, it will report an error that there is no mouse event, so we need to execute the following:
cd .config/ mkdir autostart cd autostart/ sudo nano local.desktop
And then add the following lines at the end of the local.desktop
#python2 [Desktop Entry] Type=Application Exec=python /home/pi/mouse.py #python3 [Desktop Entry] Type=Application Exec=python3 /home/pi/mouse.py
Reboot the system, you can use the buttons to control the mouse.
sudo reboot