Use to 3.2inch TFT+Touchscreen Shield

Fast 30Mhz SPI is used for the faster frame rate. You will need an official Ubuntu image to configure it.

Specifications

LCD Type	TFT
LCD Interface	SPI
Touch Screen Type	Resistive
Touch Screen Controller	XPT2046
Colors	65536
Backlight	LED
Resolution	320*240(Pixel)
Aspect Ratio	4:3
Weight	44gram

Pin Map

Pin Num	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, 22	NC	No connection
6, 9, 14, 20, 25	GND	Ground
11	TP_IRQ	Touch screen interrupt, low level while the touch screen detects touching
12	KEY1	Export GPIO#173, Wiring Pi GPIO#1
13	RST	Reset, Export GPIO#21
15	LCD_RS	LCD instruction control, Instruction/Data Register selection, Export GPIO#22
16	KEY2	Export GPIO#19, Wiring Pi GPIO#4
18	KEY3	Export GPIO#23, Wiring Pi GPIO#5
19	LCD_SI/TP_SI	SPI data input of LCD/touch screen
21	LCD_SO/TP_SO	SPI data output of LCD/touch screen
23	LCD_SCK/TP_SCK	SPI clock of LCD/touch screen
24	LCD_CS	LCD chip selection, low active
26	TP_CS	Touch screen chip selection, low active

How to activate the 3.2inch LCD shield with your ODROID-XU4

You need a HDMI connection or a Serial console connection to follow below instruction.

To use the SPI, you first need to update the kernel version to “3.10.83” or higher.

sudo apt-get update && sudo apt-get dist-upgrade

“ads7846” module driver must be in the output of “lsmod” command.

How to enable driver (Only Ubuntu 16.04 or higher is required)

Edit /etc/modprobe.d/blacklist-odroid.conf to comment out following three ines.

blacklist spidev
blacklist spi_s3c64xx
blacklist ads7846

Reboot.

reboot

Check your SPI node.

ls /dev/spidev*

Configuring framebuffer

0. Update your Kernel

sudo apt-get update && sudo apt-get dist-upgrade

1. Insert modules

sudo modprobe fbtft_device name=odroid32 rotate=90 busnum=1 gpios=reset:21,dc:22 speed=32000000 cs=0

You will have a new frame buffer /dev/fbX.

Find a ili9340 framebuffer node

ls /dev/fb*
/dev/fb0
cat /sys/class/graphics/fb0/name
fb_ili9340

Run Xwindow

0. Insert modules

sudo modprobe fbtft_device name=odroid32 rotate=90 busnum=1 gpios=reset:21,dc:22 speed=32000000 cs=0

1. Create a new config file

sudo mv /etc/X11/xorg.conf /etc/X11/xorg.conf.old

Add following lines in “/etc/X11/xorg.conf” file.

Section "Device"
    Identifier    "XU4 fbdev"
    Driver        "fbdev"
    Option        "fbdev" "/dev/fb0"
EndSection

2. Run

/etc/init.d/lightdm start

Run Console

0. Insert modules

sudo modprobe fbtft_device name=odroid32 rotate=90 busnum=1 gpios=reset:21,dc:22 speed=32000000 cs=0

1. Run con2fbmap

con2fbmap <console> <framebuffer>

sudo apt-get install fbset
sudo con2fbmap 2 0

Press Keyboard Ctrl + Alt + F2 to change the console screen of FB1
There will be a login screen on the LCD screen.

Touch Calibration

To use the Touch Calibration, you first need to update the kernel version to “3.10.96-86” or higher.

sudo apt-get update && sudo apt-get dist-upgrade

0. The xinput-calibrator pakage download

sudo apt-get install xinput-calibrator

1. Remove old calibration data.

sudo rm /etc/X11/xorg.conf.d/99-calibration.conf

2. Login

You need a login to get DISPLAY.
If you want auto login.
Edit /etc/lightdm/lightdm.conf file to enable auto-login: (password: odroid)

odroid@odroid:~$ sudo vi /etc/lightdm/lightdm.conf
[sudo] password for odroid: 
odroid@odroid:~$ cat /etc/lightdm/lightdm.conf 
[SeatDefaults]
autologin-user=odroid
autologin-user-timeout=0
odroid@odroid:~$

3. Check your DISPLAY

odroid@odroid:~$ w                                                              
09:13:31 up 35 min,  2 users,  load average: 0.09, 0.08, 0.12                  
USER     TTY      FROM             LOGIN@   IDLE   JCPU   PCPU WHAT             
odroid   ttySAC2                   08:42    2.00s  0.75s  0.02s w               
odroid   :0       :0               05:39   ?xdm?   1:15   0.63s mate-session    
odroid@odroid:~$

4. Run calibrator

sudo DISPLAY=:0 xinput_calibrator

Follow the directions on your screen.
then, you will get something like

Copy to “/etc/X11/xorg.conf.d/99-calibration.conf”

sudo mkdir /etc/X11/xorg.conf.d/
sudo vi /etc/X11/xorg.conf.d/99-calibration.conf

5. Reboot

sudo reboot

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