Raspberry LCD 3.5
3.5 inch Touch Screen TFT LCD Designed for Raspberry Pi
The RPi LCD can be driven in two ways: Method 1. install driver to your Raspbian OS. Method 2. use the Ready-to-use image file of which LCD driver was pre-installed.
Method 1. Driver installation
1. Configure your Pi:
2. Copy the driver(choose the driver according to your OS)into your OS then Run the following commands:
tar xvf LCD-show-*.tar.gz cd LCD-show/
Install the driver and it toggles the mode to LCD display:Note: Net work connection is required while installing driver to your Pi, or else the touch won't work properly.
chmod +x LCD35-show ./LCD35-show
Note: this LCD won't work after apt-get upgrade, in such cases, please edit the config.txt file in the SD card and remove this statement:
3. After system rebooting, the RPi LCD is ready to use.
Method 2. Using Ready-to-use image
The image file with pre-installed driver is located in the IMAGE directory of the CD, or you can download it from#Image. Extract the .7z file and you will get an .img file. Write the image to your micro SD card (How to write an image to a micro SD card for your Pi? SeeRPi Image Installation Guidesfor more details). Then insert the card to your Pi, power up and enjoy it.
Toggle between LCD and HDMI display
Once this LCD is enabled, meanwhile the default settings for HDMI are changed. If you want to use another HDMI monitor, please run the following command:
cd LCD-show/ ./LCD-hdmi
This toggles the mode to LCD display:
Screen orientation settings
After touch driver installed, the screen orientation can be set by these commands:
cd LCD-show/ ./LCD35-show 0
cd LCD-show/ ./LCD35-show 90
cd LCD-show/ ./LCD35-show 180
cd LCD-show/ ./LCD35-show 270
Touch screen calibration
This LCD can be calibrated using a program called xinput_calibrator which is pre-installed on the CD image. However, it was not pre-installed on original Raspbian OS. So in this case, you should get and install the program manually with
sudo apt-get install -y xinput-calibrator
Enter the following commands for touch screen calibration:
sudo DISPLAY=:0.0 xinput_calibrator
or select Menu -> Preferences -> Calibrate Touchscreen.
After running these commands, there will be a prompt for four-point calibration shown in the LCD screen. Click the points one by one to finish the touch calibration. Then, the new calibration data will be displayed in the terminal, as shows below. Please get these data for future use.
Doing dynamic recalibration: Setting new calibration data: 3919, 208, 236, 3913
Enter the following command to edit 99-calibration.conf:
sudo nano /etc/X11/xorg.conf.d/99-calibration.conf
Then, the old calibration data will be displayed in the terminal:
Section "InputClass" Identifier "calibration" MatchProduct "ADS7846 Touchscreen" Option "Calibration" "160 3723 3896 181" Option "SwapAxes" "1" EndSection
Modify the calibration data to the new calibration data displayed above):
Section "InputClass" Identifier "calibration" MatchProduct "ADS7846 Touchscreen" Option "Calibration" "3919 208 236 3913" Option "SwapAxes" "1" EndSection
Press the keys Ctrl+X, and select the option Y to save the modification.
The modification will be valid after rebooting the system. Enter the following command for system reboot:
Notices: In case of inaccurate touch, please perform screen calibration again and reboot the system.
How to work with a camera
1. Select "Enable Camera" -> "<YES>"
2. Copy theCamera driverto the OS of Pi then:
unzip camera.zip cd camera sudo chmod 777 Camera sudo cp update\ camera/95-stmpe.rules /etc/udev/rules.d/
3. Create a file called wheezy.list.
sudo nano /etc/apt/sources.list.d/wheezy.list
deb http://archive.raspbian.org/raspbian wheezy main
Exit with save.
4. Create a file called 10defaultRelease.
sudo nano /etc/apt/apt.conf.d/10defaultRelease
Exit with save.
5. Create a file called libsdl.
sudo nano /etc/apt/preferences.d/libsdl
Package: libsdl1.2debian Pin: release n=jessie Pin-Priority: -10 Package: libsdl1.2debian Pin: release n=wheezy Pin-Priority: 900
Exit with save.
6. Last, execute the commands:
sudo apt-get update sudo apt-get -y --force-yes install libsdl1.2debian/wheezy sudo apt-get install evtest tslib libts-bin xinput sudo apt-get install python-pip sudo apt-get install python2.7-dev sudo pip install picamera==1.10 sudo reboot sudo TSLIB_FBDEVICE=/dev/fb1 TSLIB_TSDEVICE=/dev/input/touchscreen ts_calibrate
Camera will be enabled by the steps above.
Description: if you felt hard to install driver, try the image with driver pre-installed.
The drivers are not available for NOOBS or any system installed by NOOBS.
If the touch screen doesn't work properly, please install the driver: LCD-show-170703.tar.gz, but not LCD-show-161112.tar.gz.
LCD Panel Dimension
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