7inch DSI LCD
Contents
Introduction
7inch Capacitive Touch Display for Raspberry Pi, 800×480, TFT Wide Angle, MIPI DSI Interface
Features
- 7inch TFT screen. 800x480 hardware resolution
- Capacitive touch panel, support 5-point touch
- Supports Pi 4B/3B+/3A+/3B/2B/B+/A+. Another adapter board is required for CM3/3+
- DSI interface, refresh rate up to 60Hz.
- Supports Raspbian/Ubuntu/Kali and WIN 10 IoT, driver-free.
- Support backlight adjusts by software.
User guide
Hardware connection
1) Connect the DSI interface of 7inch DSI LCD to the DSI interface of Raspberry Pi.
2) Use the 2PIN power cable to connect the power interface of the LCD to the 40PIN GPIO interface of the Raspberry Pi, as below:
3) For easy use, you can fix the Raspberry Pi on the backside of the 7inch DSI LCD with screws
Software setting
1) Download image (Raspbian, Ubuntu, Kali, or WIN 10 IOT) from the Raspberry Pi website. https://www.raspberrypi.org/downloads/
2) Download the compressed file to the PC, and unzip it to get the .img file.
3) Connect the TF card to the PC, use SDFormatter.exe software to format the TF card.
4) Open the Win32DiskImager.exe software, select the system image downloaded in step 2, and click‘Write’ to write the system image.
5) After the image has finished writing, save, and quit the TF card safely.
6) Power on the Raspberry Pi and wait for a few seconds until the LCD displays normally. And the touch function can also work after the system starts.
【Note】
- On December 2, 2021, the Raspberry Pi OS was divided into two branches, the Buster branch and the Bullseye branch. The Buster branch is a continuation of the old system and is more stable. The Bullseye branch added some new features, using open source libraries and new interfaces. Since the current Bullseye branch has just been released shortly, it is not stable yet. If you are an industrial user, it is strongly recommended to use the Buster branch.
- If you are using the Buster branch system, the DSI LCD can work with Raspberry Pi directly after connecting and powering on. But if you are using the Bullseye branch system, you need to modify the config.txt as below:
Open the config.txt file in the root directory of the TF card(/boot), comment out the following lines:
#camera_auto_detect=1 #dtoverlay=vc4-kms-v3d
Add the following lines under [all]:
dtoverlay=vc4-fkms-v3d start_x=1
Then save the file and reboot the system:
sudo reboot
- If you need to use the CSI camera under the Bullseye branch system. Since this branch uses the libcamera camera library by default, the library doesn't support FKMS drivers.
So in addition to the above modification, you also need to install the Raspicam camera library.
The installation method is as follows:
cd ~ sudo apt install cmake git clone https://github.com/raspberrypi/userland cd userland ./buildme sudo cp build/bin/* /bin/
Then execute the following command to shut down the system:
poweroff
Connect the Raspberry Pi camera to the CSI interface of the Raspberry Pi, power on the Raspberry Pi again, and after the system boots, execute the following command:
Take a picture:
raspistill -o image.jpg
Take a video:
raspivid -o video.h264 -t 10000
Backlight Controlling
- Open a terminal and type the following command to adjust the brightness. Note: If the command reports the 'Permission denied' error, please switch to the 'root' user mode and execute it again.
echo X > /sys/class/backlight/rpi_backlight/brightness
- X can be value in range 0~255. The backlight is darkest if you set it to 0 and the backlight is set to lightest if you set it to 255
echo 100 > /sys/class/backlight/rpi_backlight/brightness echo 0 > /sys/class/backlight/rpi_backlight/brightness echo 255 > /sys/class/backlight/rpi_backlight/brightness
- We also provide a example for brightness adjusting, you can download and install it by following commands:
wget https://www.waveshare.net/w/upload/3/39/Brightness.tar.gz tar -xzf Brightness.tar.gz cd brightness ./install.sh
- After connecting, you can choose Menu -> Accessories -> Brightness to open the adjustment software
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Note: If you use the 2021-10-30-raspios-bullseye-armhf image or the laster version, please add the line dtoverlay=rpi-backlight to the config.txt file and reboot.
Install virtual keyboard
Open a terminal and install it by the following command
sudo apt-get install matchbox-keyboard
After installing, you can click Accessories -> Keyboard to open the keyboard.
Disable touching
If you want to disable the touch function, you can modify the config.txt file, add the following line to the file and reboot
disable_touchscreen=1
FAQ
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Anti-Piracy
Since the first-generation Raspberry Pi released, Waveshare has been working on designing, developing, and producing various fantastic touch LCDs for the Pi. Unfortunately, there are quite a few pirated/knock-off products in the market. They're usually some poor copies of our early hardware revisions, and comes with none support service.
To avoid becoming a victim of pirated products, please pay attention to the following features when purchasing:
Beware of knock-offs
Please note that we've found some poor copies of this item in the market. They are usually made of inferior materials and shipped without any testing.
You might be wondering if the one you're watching or you've purchased in other non-official stores is original, feel free to contact us.
