Raspberry Pi 4inch HDMI LCD User Guide

Introduction

4inch Resistive Touch Screen LCD, HDMI interface, IPS Screen, Designed for Raspberry Pi

Features

800×480 high resolution
Resistive touch control
IPS technology, high quality and perfect displaying from very wide viewing angle
Compatible and Direct-connect with any revision of Raspberry Pi (except the Pi 1 model B or Pi Zero, which requires an HDMI cable)
Drivers provided (works with your own Raspbian/Ubuntu directly)
Also works as a computer monitor, in this case, touch panel is unavailable and HDMI cable is required
HDMI interface for displaying, no I/Os required (however, the touch panel still needs I/Os)
Back light control to lower power consumption

Getting Started

Hardware Connection

Plug the LCD to your Raspberry Pi:
There are 40 pins on Raspberry Pi Model A+/B+/2 B/3 B but only 26 pins on the LCD, so you should pay attention to connecting the pins to your Pi accordingly.
Connect the HDMI Connector to both the HDMI interfaces on the LCD and the Pi.
You should connect the LCD to Raspberry Pi Model B or Raspberry Pi Zero with an HDMI cable rather than an HDMI Connector.
Turn on the "backlight" switch on the back of the LCD.
You can enable the touch in two ways: Method 1. install driver to your Raspbian/Ubuntu Mate OS. Method 2. use the Ready-to-use image file of which LCD driver was pre-installed.

Method 1. Driver installation

1) Download the Raspbian / Ubuntu Mate image from Raspberry Pi website and extract it on a PC.

2) Connect your micro SD card to the PC and write the image to the card using Win32DiskImager. How to write an image to a micro SD card for your Pi? See RPi Image Installation Guides for more details)

3) Copy the LCD driver to the micro SD card (or copy the driver to the system of Pi using a USB drive).

4) Append the following lines to the config.txt file which is located in the root of the card:

hdmi_group=2
hdmi_mode=87
hdmi_cvt 480 800 60 6 0 0 0
dtoverlay=ads7846,cs=1,penirq=25,penirq_pull=2,speed=50000,keep_vref_on=0,swapxy=0,pmax=255,xohms=150,xmin=200,xmax=3900,ymin=200,ymax=3900
display_rotate=3

5) The LCD will display after booting up. Then open a terminal to install the touch driver which can be found in the /boot/ directory.

git clone https://github.com/waveshare/LCD-show.git
cd LCD-show/
chmod +x LCD4-800x480-show
./LCD4-800x480-show

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

Method 2. Using Ready-to-use image

The image file with pre-installed driver is located in the IMAGE directory of the CD. 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.

Screen orientation settings

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

0 degree rotation

cd LCD-show/
./LCD4-800x480-show 0

90 degree rotation

cd LCD-show/
./LCD4-800x480-show 90

180 degree rotation

cd LCD-show/
./LCD4-800x480-show 180

270 degree rotation

cd LCD-show/
./LCD4-800x480-show 270

Touch screen calibration

This LCD can be calibrated using a program called xinput_calibrator which can be downloaded from Xinput-calibrator_0.7.5-1_armhf
Extract and copy the software Xinput-calibrator_0.7.5-1_armhf.deb to the Raspbian of your Pi.
Install it with the commands:

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

Click the "Menu" button on the task bar, 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).

/ect/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:

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, 11, 12, 13, 15, 16, 18, 24	NC	NC
6, 9, 14, 20, 25	GND	Ground
19	TP_SI	SPI data input of Touch Panel
21	TP_SO	SPI data output of Touch Panel
22	TP_IRQ	Touch Panel interrupt, low level while the Touch Panel detects touching
23	TP_SCK	SPI clock of Touch Panel
26	TP_CS	Touch Panel chip selection, low active

User Manual

4inch HDMI LCD User Manual

Driver

The driver can be downloaded from github

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

Software

Image

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

4inch_HDMI_Raspbian-180326.7z

LCD Panel Dimension

4inch HDMI LCD panel dimension

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 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 then just copy and paste.
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 inserted the GPIO for touching and power. BTW, you can also connect external power adapter to USB interface for power if LCD has external power interface.

Question:

What is working temperature of this LCD?

Answer:

The working temperature is 0°C -- 70°C

Question:

It seems not to work as a computer monitor for a Windows PC, right?

Answer:

This LCD is used for portrait display. You can set the orientation on Windows: desktop right click --> display settings --> orientation: portrait.

To：

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