UCTRONICS_LCD35_RPI (SKU: U4703)

This driver is used for UCTRONICS LCD35 with SPI interface

Revision History:

• 2018/05/30 : Add support rotate 0/ 90/ 180/ 270 degree for Pi3B and Pi3B+
• 2018/05/30 ：Optimize the bug of making kernel panic
• 2018/06/01 : Add support rotate 0/ 90/ 180/ 270 degree for Pi zero and Pi B+

Any problems, please refer to our troubleshootings

• https://github.com/UCTRONICS/UCTRONICS_LCD35_RPI/blob/master/Troubleshooting.md

Easy Install

wget https://raw.githubusercontent.com/UCTRONICS/UCTRONICS_LCD35_RPI/master/install

sudo chmod +x install

sudo ./install 

Detail operations

Step1: Expand the sd card first

sudo raspi-config choose Advanced Operations -> Expand Filesystem 

sudo reboot

Step2: Update your raspberry pi system

 sudo apt-get update

Step3: Download the driver package

 sudo git clone https://github.com/UCTRONICS/UCTRONICS_LCD35_RPI.git

Step4: Come in the UCTRONICS_LCD35_RPI

 cd UCTRONICS_LCD35_RPI

Step5: Get run permissions

 sudo chmod 777 UCTRONICS_LCD_backup

 sudo chmod 777 UCTRONICS_LCD35_install

 sudo chmod 777 UCTRONICS_LCD_restore

 sudo chmod 777 UCTRONICS_LCD_hdmi

Step6: backup data

 sudo ./UCTRONICS_LCD_backup

Step7: install the LCD35 driver

 sudo ./UCTRONICS_LCD35_install

wait a while the system will be installed and restarted automatically.

Reuse the pre-installation system

 sudo ./UCTRONICS_LCD_restore

display on hdmi

   sudo ./UCTRONICS_LCD_hdmi

Add more functions for the LCD :

NO1. Install calibration software for calibration

  cd UCTRONICS_LCD35_RPI

  sudo unzip Xinput-calibrator_0.7.5-1_armhf.zip 

  cd xinput-calibrator_0.7.5-1_armhf/

  sudo dpkg -i -B xinput-calibrator_0.7.5-1_armhf.deb

NO2. Install virtual keyboard

• 1. Execute the following commands to install the corresponding software

     sudo apt-get update

     sudo apt-get install matchbox-keyboard

     sudo nano /usr/bin/toggle-matchbox-keyboard.sh

• 2. Copy the following contents to toggle box - keyboard. Sh, save the exit

     #!/bin/bash
     #This script toggle the virtual keyboard
     PID=`pidof matchbox-keyboard`
     if [ ! -e $PID ]; then
     killall matchbox-keyboard
     else
     matchbox-keyboard -s 50 extended&
     fi

• 3. Execute the following command

     sudo chmod +x /usr/bin/toggle-matchbox-keyboard.sh

     sudo mkdir /usr/local/share/applications

     sudo nano /usr/local/share/applications/toggle-matchbox-keyboard.desktop

• 4. Copy the following contents to toggle - matchbox - keyboard. Desktop, save exit

     [Desktop Entry]
     Name=Toggle Matchbox Keyboard 
     Comment=Toggle Matchbox Keyboard` 
     Exec=toggle-matchbox-keyboard.sh
     Type=Application
     Icon=matchbox-keyboard.png
     Categories=Panel;Utility;MB
     X-MB-INPUT-MECHANSIM=True

• 5. To perform the following command, note that this step must use the "PI" user permission, and if the administrator privileges are used, the file will not be found

     nano ~/.config/lxpanel/LXDE-pi/panels/panel

  • 6. Find similar commands (different versions of ICONS may differ)

       Plugin {
       type = launchbar
       Config {
       Button {
       id=lxde-screenlock.desktop
       }
       Button {
       id=lxde-logout.desktop 
       }
       }

• 7. Add the following code to add a Button item

     Button {
     id=/usr/local/share/applications/toggle-matchbox-keyboard.desktop
     }

• 8. To restart the system with the following command, you can see a virtual keyboard icon in the top left corner

     sudo reboot

Add new ICON to desktop ?

If it's just a folder, add it directly to the desktop

If it is an executable, follow this steps:

• step1: choose the Directory Tree -> / -> usr -> share ->applications folder

• Step2: choose a icon you want to link

• Step3: choose edit -> create link... ->Desktop ->OK

Rotate the screen to 0/90/180/270 degree

cd ~UCTRONICS_LCD35_RPI

• For rotate 0 ：

           sudo chmod +x UCTRONICS_LCD35_install
           sudo ./UCTRONICS_LCD35_install 

• For rotate 90 ：

          sudo chmod +x UCTRONICS_LCD35_rotation_90_install 
          sudo ./UCTRONICS_LCD35_rotation_90_install 

  For rotate 180 ：

          sudo chmod +x UCTRONICS_LCD35_rotation_180_install 
          sudo ./UCTRONICS_LCD35_rotation_180_install

  For rotate 270 ：

          sudo chmod +x UCTRONICS_LCD35_rotation_270_install 
          sudo ./UCTRONICS_LCD35_rotation_270_install

Rotation =0

Rotation =180