Template: 3.2inch HDMI LCD H User Manual

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Work with Windows PC

To use with Windows PC, the display supports Windows 11, 10, 8.1, 8 and Windows 7

  • Connect the Only Power interface to the USB port of PC
  • Connect the Display interface to the HDMI port of PC

Note: This display is a portrait mode by default, resolution is 480 x 800. You can change the orientation by software.

Work with Raspberry Pi

To use display with the Raspberry Pi, this LCD can support Raspberry Pi OS / Ubuntu / Kali and Retropie systems, you need to configure the resolution manually.

  • Download the newest image from Raspberry Pi website.
  • Unzip the image archive and get the .img file.
  • Format the SD card by the SDFormatter software
  • User the Win32DiskImager software, write the .img file to the SD card.
  • After writing, modify the config.txt file:
hdmi_group=2
hdmi_mode=87
hdmi_timings=480 0 50 20 50 800 0 19 20 20 0 0 0 60 0 38000000 6
  • Save and eject the sd card.
  • Insert the SD card to Raspberry Pi
  • Connect the Only Power interface to the USB port of Raspberry Pi
  • Connect the Display interface to the HDMI port of Raspberry Pi
  • Waiting for a moment, and the display lights and works.

Note: This display is a portrait mode by default, resolution is 480 x 800. You can change the orientation by software.

Orientation

Windows PC

  • Right-click and choose the Display setting
W-R-3.png
  • Click the Identify to detect the display
    • Choose the display, set the display mode to extend and change the orientation
W-R-2.png

Raspberry Pi

Update software version

Raspberry Pi OS Bullseye branch needs to update the software version, and this step can be omitted for other systems.

sudo apt-get update
sudo apt-get full-upgrade

Raspberry Pi OS and Kali display rotation

First check whether the KMS or FKMS driver is loaded on the system you are using.

Check method: In /boot/config.txt, check whether the line dtoverlay=vc4-kms-v3d or dtoverlay=vc4-fkms-v3d is turned on.

With KMS or FKMS driver loaded

Use the following command for display rotation:

sudo nano /etc/xdg/lxsession/LXDE-pi/autostart
#Enter the command corresponding to the display rotation angle at the end of the autostart file, and it will take effect after rebooting the system.
#0: rotate 0 degrees; 1: rotate 270 degrees; 2: rotate 180 degrees; 3: rotate 90 degrees
xrandr -o 1
No KMS or FKMS driver loaded

Use the following command for display rotation:

sudo nano /boot/config.txt
#Enter the command corresponding to the display rotation angle at the end of the config.txt file, and it will take effect after rebooting the system.
#0: rotate 0 degrees; 1: rotate 90 degrees; 2: rotate 180 degrees; 3: rotate 270 degrees
display_rotate=3

Ubuntu display rotation

First check whether the KMS or FKMS driver is loaded on the system you are using.

Check method: In /boot/firmware/config.txt, check whether the line dtoverlay=vc4-kms-v3d or dtoverlay=vc4-fkms-v3d is turned on.

With KMS or FKMS driver loaded

Use the following methods for display rotation.

Note: For different versions of Ubuntu systems, the interface may be different. Generally, you can find the Displays application and rotate it.

GPIO-HDMI-Manual-01.png

GPIO-HDMI-Manual-02.png

GPIO-HDMI-Manual-03.png

Execute the command to rotate the Ubuntu login interface. If the Ubuntu login interface is not opened, this step can be omitted:

#For 32-bit systems, execute the following command, replace your_user with the currently logged in user name
sudo cp /home/<your_user>/.config/monitors.xml /var/lib/lightdm/.config
#For 64-bit systems, execute the following command, replace your_user with the currently logged in user name
sudo cp /home/<your_user>/.config/monitors.xml /var/lib/gdm3/.config
sudo chown gdm:gdm /var/lib/gdm3/.config/monitors.xml

Execute the following command to rotate the command line display during startup:

sudo nano /boot/firmware/cmdline.txt
#Add the following code at the end to rotate the command line
#rotate 0 degrees
fbcon=rotate:0 video=HDMI-A-1:[email protected],rotate=0
#Rotate 90 degrees
fbcon=rotate:3 video=HDMI-A-1:[email protected],rotate=90
#rotate 180 degrees
fbcon=rotate:2 video=HDMI-A-1:[email protected],rotate=0
#rotate 270 degrees
fbcon=rotate:1 video=HDMI-A-1:[email protected],rotate=270
No KMS or FKMS driver loaded

Rotation is relatively simple, just use the following command to display rotation:

sudo nano /boot/firmware/config.txt
#Enter the command corresponding to the display rotation angle at the end of the config.txt file, and it will take effect after rebooting the system.
#0: rotate 0 degrees; 1: rotate 90 degrees; 2: rotate 180 degrees; 3: rotate 270 degrees
display_rotate=3

Use with Jetson Nano

1) Connect the Only Power port of the LCD to the USB port of the PC.
2) Connect the Display port of the LCD to the HDMI port of the PC.

Others

Control Backlight

The brightness can be adjusted by the buttons on the side。

3.2H-2.jpg