4.3inch HDMI LCD User Manual
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4.3inch HDMI LCD
User Manual
OVERVIEW
This is 4inch resistive touch screen with 480x272 resolution, HDMI interface,
designed for Raspberry Pi
FEATURES
⚫ 480x272 hardware resolution
⚫ Resistive touch control
⚫ Supports Raspberry Pi Zero/Zero W/Zero WH/A+/B+/2B/3B (the Pi 1 model B or
Pi Zero requires an HDMI cable)
⚫ Drivers provided (works with your own Raspbian/Ubuntu/Kali/Retropie)
⚫ HDMI interface for displaying, no I/Os required (however, the touch panel still
needs I/Os)
⚫ Backlight can be turned off to lower power consumption
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CONTENT
Overview ........................................................................................................................................................1
Features .................................................................................................................................................1
Versions .........................................................................................................................................................3
How to use ...................................................................................................................................................4
Hardware connection .......................................................................................................................4
Method 1, Install driver ...................................................................................................................4
Method 2 Using ready-to-use image .........................................................................................6
Setting orientation ............................................................................................................................6
Calibration ............................................................................................................................................6
Interface .........................................................................................................................................................8
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VERSIONS
We updated of the controller from TFP401A to RTD2660H because of supply
reasons. RTD2660H has higher compatibility than TFP401A, however, higher the
consumption.
V1:
V2:
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HOW TO USE
The touch of the LCD can be driven in two ways: Method 1: Install driver manually;
Method 2: Using ready-to-use Image
HARDWARE CONNECTION
⚫ Insert LCD directly to 40PIN header of Raspberry Pi.
⚫ Using the HDMI adapter or HDMI cable to connect HDMI interface of LCD to
Raspberry Pi’s
METHOD 1, INSTALL DRIVER
1. Download lasted OS1 image from Raspberry Pi website.
2. Extract image from ZIP archive and write it to SD card
3. After writing, modify the config.txt file which is located at root directory (BOOT) of
SD card. Append these statements to the end of config.txt file
1
This instruction is based on Raspbian OS
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a) For V1 version:
1. max_usb_current=1
2. hdmi_group=2
3. hdmi_mode=87
4. hdmi_timings=480 0 1 41 2 272 0 2 10 2 0 0 0 60 0
9009000 3
5. display_rotate=2
6. hdmi_drive=2
b) For V2 version
1. display_rotate=2
2. max_usb_current=1
3. hdmi_group=2
4. hdmi_mode=87
5. hdmi_cvt 480 272 60 6 0 0 0
6. dtoverlay=ads7846,cs=1,penirq=25,penirq_pull=2,speed=500
00,keep_vref_on=0,swapxy=0,pmax=255,xohms=150,xmin=200,x
max=3900,ymin=200,ymax=3900
7. hdmi_drive=1
8. hdmi_force_hotplug=1
4. Insert SD card to Raspberry Pi and power it on.
5. Connect to network，open terminal to download and install driver.
a) For V1 version
git clone https://github.com/waveshare/LCD-show.git
cd LCD-show/
sudo ./LCD43-show
b) For V2 version
git clone https://github.com/waveshare/LCD-show.git
cd LCD-show/
sudo ./LCD43-show-V2
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6. Waiting for rebooting
METHOD 2 USING READY-TO-USE IMAGE
1. Download image we provided on wiki
- Raspbian for 4.3inch HDMI LCD
2. Extract the image file and write to SD card
3. Insert the SD card to Raspberry Pi and power on.
SETTING ORIENTATION
After installing driver, you can set the orientation as below
⚫ For V1 version
cd LCD-show/
#Choose one command to execute
sudo ./LCD43-show X
⚫ For V2 version
cd LCD-show/
#Choose one command to execute
sudo ./LCD43-show-V2 X
【Note】X can be 0, 90, 180 or 270
CALIBRATION
If the touch of RPi LCD is not calibrated, you can calibrate the touch screen.
1. Copy and install calibrator tool
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cp LCD-show/xinput-calibrator_0.7.5-1_armhf.deb ~/
sudo dpkg -i -B xinput-calibrator_0.7.5-1_armhf.deb
2. Install X service
sudo apt-get install xserver-xorg-input-evdev
sudo cp -rf /usr/share/X11/xorg.conf.d/10-evdev.conf /usr/share/X11/xorg.conf.d/45-evdev.conf
sudo reboot
3. Running calibrator and finish calibration
DISPLAY=:0.0 xinput_calibrator
4. Saving the calibration data to 99-clibration.conf file
sudo mkdir /etc/X11/xorg.conf.d
sudo nano /etc/X11/xorg.conf.d./99-calibration.conf
The calibration data looks like；
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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
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