Difference between revisions of "3.5inch RPi LCD (A)"

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== '''Introduction''' ==
 
== '''Introduction''' ==
 
3.5 inch Touch Screen TFT LCD Designed for Raspberry Pi
 
3.5 inch Touch Screen TFT LCD Designed for Raspberry Pi
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== '''Features''' ==
 
== '''Features''' ==

Revision as of 09:41, 22 March 2021

3.5inch RPi LCD (A)
3.5inch-RPi-LCD-A l.jpg
Information

Categories: OLEDs / LCDs, LCD, Raspberry Pi LCD

Brand: Waveshare

Description
Features

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Interfaces

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Related products

Template:Product List

Introduction

3.5 inch Touch Screen TFT LCD Designed for Raspberry Pi


Features

  • 480×320 hardware resolution
  • Resistive touch control
  • It is compatible and can be directly inserted in any version of Raspberry Pi.
  • Drivers provided (works with your own Raspbian/Ubuntu/Kali and Retropie system directly)
  • Support FBCP software driver, can set the software resolution and dual screen display.
  • Gold sinking process, fine carving.

Getting Started

Hardware Connection

  • There are 40 pins on Raspberry Pi but only 26 pins on the LCD, so you should pay attention to connecting the pins to your Pi accordingly.

Install the touch driver

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 Please download the latest version of the image on the Raspberry Pi official website. (Raspbian/Ubuntu Mate/Kali or Retropie) 1) Download the compressed image file to the PC, and unzip it to get the .img file. 2) Connect the TF card to the PC, open the Win32DiskImager software, select the system image downloaded in step 1 and click‘Write’ to write the system image. ( How to write an image to a micro SD card for your Pi? See RPi Image Installation Guides for more details) 3) Connect the TF card to the Raspberry Pi, start the Raspberry Pi. The LCD will display after booting up, and then log in to the Raspberry Pi terminal.(You may need to connect a keyboard and HDMI LCD to Pi for driver installing, or log in remotely with SSH) 4) Then open the terminal of Raspberry Pi to install the touch driver.

git clone https://github.com/waveshare/LCD-show.git
cd LCD-show/

Note: The Raspberry Pi must be connected to the network, or else the touch driver won't be successfully installed. chmod +x LCD35-show

./LCD35-show

The touch function will work after restart. For ease of use, you can set the screen orientation, see: #Screen orientation settings. Notes:

  • 1. Executing apt-get upgrade will cause the LCD to fail to work properly. In this case, you need to edit the config.txt file in the SD card and delete this sentence: dtoverlay=ads7846.
  • 2. Using with Raspbian-lite, the command of the touch driver installation should be:

./LCD35-show lite 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? See RPi Image Installation Guides for 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: ./LCD35-show

Screen orientation settings

After touch driver installed, the screen orientation can be set by these commands:

  • 0 degree rotation
cd LCD-show/
./LCD35-show 0
  • 90 degree rotation
cd LCD-show/
./LCD35-show 90
  • 180 degree rotation
cd LCD-show/
./LCD35-show 180
  • 270 degree rotation
cd LCD-show/
./LCD35-show 270

Touch screen calibration

This LCD can be calibrated through the xinput-calibrator program. Note: The Raspberry Pi must be connected to the network, or else the program won't be successfully installed.

  • Run the following command to install:
sudo apt-get install xinput-calibrator 
  • Click the "Menu" button on the taskbar, choose "Preference" -> "Calibrate Touchscreen".
  • Finish the touch calibration following the prompts. Maybe rebooting is required to make calibration active.
  • You can create a 99-calibration.conf file to save the touch parameters (not necessary if file exists).
sudo mkdir /etc/X11/xorg.conf.d
sudo nano /etc/X11/xorg.conf.d/99-calibration.conf
  • Save the touch parameters (may differ depending on LCD) to 99-calibration.conf, as shown in the picture:

5inch HDMI LCD FAQ1.jpg

  • Press the keys Ctrl+X, and select option Y to save the modification.
  • The modification will be valid after rebooting the system. Enter the following command for system reboot:
sudo reboot

Notices: In case of inaccurate touch, please perform screen calibration again and reboot the system. Template:Virtual Keyboard Installation

How to work with a camera

1. Select "Enable Camera" -> ""

sudo raspi-config

2. Copy the Camera driver to 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

Append:

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

Append:

APT::Default-release \"stable";

Exit with save. 5. Create a file called libsdl.

sudo nano /etc/apt/preferences.d/libsdl

Append:

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.

Interface

PIN NO. SYMBOL DESCRIPTION
1, 17 3.3V Power positive (3.3V power input)
2, 4 5V Power positive (5V power input)
3, 5, 7, 8, 10, 12, 13, 15, 16 NC NC
6, 9, 14, 20, 25 GND Ground
11 TP_IRQ Touch Panel interrupt, low level while the Touch Panel detects touching
18 LCD_RS Command/data register selection
19 LCD_SI / TP_SI LCD display/SPI data input of Touch Panel
21 TP_SO SPI data output of Touch Panel
22 RST Reset
23 LCD_SCK / TP_SCK LCD display/SPI clock of Touch Panel
24 LCD_CS LCD chip selection, low active
26 TP_CS Touch Panel chip selection, low active

Resource

User Manual

Image

Description: if you felt hard to install driver, try the image with driver pre-installed.

Driver

The driver can be downloaded from github

git clone https://github.com/waveshare/LCD-show.git


Software

LCD Panel Dimension

FAQ

FAQ

Question:
Why does the touchscreen not work well?
Answer:

Now, we only provide touch screen drivers for Raspbian and Ubuntu Mate. How to install the driver? See:#Method_1._Driver_installation


Question:
Why does the image provided on the wiki does not work on my Pi?
Answer:
  • The image provided may differ depending on batches, however, some Images are just available for Pi 2 (or before, but not for Pi 3). In such cases, you can download the latest version from Raspberry Pi website and install the driver. See:#Method_1._Driver_installation
  • Make sure the hardware connection is correct and connects fine.
  • Make sure you've written the image to your SD card using the software File:Win32DiskImager.zip rather than just copy and paste.
  • When the Raspberry Pi starts normally, the PWR light is always on and the ACT light is blinking. If you find that both lights are always on, it may be that the TF card failed to burn the image or the TF card is in poor contact with the Raspberry Pi.
  • It is strongly recommended to use a stand-alone 5V/3A power adapter because the USB port of PC might not have enough power to support the Pi and LCD.


Question:
Could I only connect the HDMI cable?
Answer:
No, the HDMI interface is only used for display. You also need to insert the GPIO for touching and power. BTW, you can also connect the external power adapter to the USB interface for power if LCD has an external power interface.


Question:
What is the working temperature of this LCD?
Answer:
The working temperature is 0°C -- 70°C


Question:
What are the power requirements?
Answer:
When working with 5V input, the current is about 150mA.



Anti-Piracy

Template:RPi LCD Anti-Piracy

Beware of knock-offs

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Support

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Working hours: 09:00-18:00 (UTC+8 Monday to Saturday)