Screen Usage

LCD HDMI Screen Usage

LCD DSI Screen Usage

DSI usage method

• After the image writing is completed, add the following command in /boot/config.txt

dtoverlay=vc4-kms-dsi-7inch

• Save and exit

Using TFT Screen with G2T

Precautions:

• Ensure that the upper computer is powered off before installing the expansion board.
• Avoid using the expansion board in a humid or dusty environment.
• When installing the screen, please note not to plug and unplug while powered on, pay attention to the direction of the screen cable to avoid damage.
• When installing the fan, please note the current and voltage specifications of the fan to avoid damage.
• Please note that UART1 is already enabled by default and does not need to be configured.
• Please flash the latest image such as mainsailos, not kernel upgrade.
• The Raspberry Pi can use all interfaces!!!
• Note: The system kernel version used by the Raspberry Pi must be greater than 5.17.x, execute the command uname -r to view the kernel version.

Raspberry Pi Pre-installed TFTV2 System Download Link

• System image suitable for Raspberry Pi 3B/3B+/4B/CM4/5B

https://cdn.mellow.klipper.cn/IMG/Beta/RPI-TFT-IMG-new.img.xz

Install Screen Driver

• Note that you can directly use the pre-installed system.
• Project address: FLY-TFT

Introduction

FLY-TFT-V2 is a TFT liquid crystal display based on st7796, supporting both capacitive and resistive touch screens, with a resolution of 320x480, using SPI interface

• You need to install KlipperScreen yourself.

System Installation

Precautions

Note: The system kernel version used by the Raspberry Pi must be greater than 5.17.x, execute the command uname -r to view the kernel version. Please flash the latest image such as mainsailos, not kernel upgrade.

• Use Raspberry Imager to install the latest MainsailOS
  1. Download and install Raspberry Imager
  2. Open Raspberry Imager
  3. Click CHOOSE DEVICE
  4. Choose the corresponding model according to your device
  5. Click CHOOSE OS
  6. Select Other specific-purpose OS
  7. Select 3D printing
  8. Select Mainsail OS
  9. Select the latest version. If your settings support 64-bit systems, select rpi64
  10. Click CHOOSE STORAGE
  11. Select your storage device, such as an SD card
  12. Click NEXT, wait for the installation to complete

Driver Installation

• Install FLY-TFT-V2 driver

git clone https://github.com/kluoyun/FLY-TFT.git
cd FLY-TFT
sudo chmod +x ./scripts/install.sh
./scripts/install.sh

Enable TFT Display

• Touch requires enabling I2C support, the corresponding configuration is dtparam=i2c_arm=on

1. After installing the driver, add the overlay support dtoverlay=fly-tft-v2 to the config.txt file
2. Open /boot/config.txt (for bookworm system it's /boot/firmware/config.txt)

   sudo nano /boot/config.txt

3. Add the following configuration at the end of the file

    dtoverlay=fly-tft-v2

• By default, the screen is displayed in landscape mode at 90 degrees. If you need to rotate the screen, use the following configuration

    dtoverlay=fly-tft-v2,r90  # Landscape orientation
    dtoverlay=fly-tft-v2,r270 # Landscape orientation (flipped)
    dtoverlay=fly-tft-v2,r0   # Portrait orientation
    dtoverlay=fly-tft-v2,r180 # Portrait orientation (flipped)

• Only one configuration can be added, multiple configurations cannot be added
• In normal cases, the touch direction of the TFT will automatically follow the display direction without modifying the touch configuration in the system

4. After adding to the end of the file, execute the command sudo reboot to restart the system

Use TFT

• Make sure the hardware connection is correct
• Installed drivers
• Added dtoverlay=fly-tft-v2 overlay support in the /boot/config.txt (for bookworm system it's /boot/firmware/config.txt) file
• Some systems may have a default fb0 device, FLY-TFT will be assigned to the fb1 device, you need to modify the configuration file to enable the fb1 device
• Execute the command ls /dev/fb* to view the devices, if two devices fb0 and fb1 appear, please execute the following command to enable the fb1 device (by default it is fb0)
• Execute the following command to modify the default configuration to the fb1 device

  sudo sed -i 's/\/dev\/fb0/\/dev\/fb1/g' /etc/X11/xorg.conf.d/99-fbdev.conf

Use KlipperScreen

• MainsailOS does not come with KlipperScreen installed by default, you need to install it manually
• Refer to KlipperScreen or use kiauh to install
• If KlipperScreen is successfully installed and step 5 is correctly completed, the KlipperScreen interface should now be displayed

All Available Configurations

• speed [requires parameter]: Set the maximum SPI clock frequency of the TFT, unit is Hz, default is 96000000 (if severe screen artifacts occur, reduce this value appropriately)

• Example: dtoverlay=fly-tft-v2,speed=80000000

• r0/r90/r180/r270 [optional][no parameter required]: Set the display and touch direction of the TFT, default is 90 degrees, selectable values are 0,90,180,270 (only one configuration can be added)

• Example: dtoverlay=fly-tft-v2,r90 or dtoverlay=fly-tft-v2,r180

• disable_touch [no parameter required]: Disable the touch function of the TFT, disabled by default

• Example: dtoverlay=fly-tft-v2,disable_touch

• invx,invy [no parameter required]: Set the touch direction of the TFT, invx is X-axis flip, invy is Y-axis flip

• Example: dtoverlay=fly-tft-v2,invx or dtoverlay=fly-tft-v2,invy or dtoverlay=fly-tft-v2,invx,invy

• swapxy [no parameter required]: Set the touch direction of the TFT, swap X-axis and Y-axis, i.e., landscape mode

  • Example: dtoverlay=fly-tft-v2,swapxy

Note: All parameters can be set simultaneously (optional parameters can only choose one), separate multiple parameters with commas, only one line can contain multiple parameters

Warning: Under normal circumstances, only the r0, r90, r180, r270 four parameters are used, other parameters are only used in special cases, especially invx, invy, swapxy

• Example: dtoverlay=fly-tft-v2,speed=80000000,r270