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Table of Contents
ODROID-VU8C
8inch multi-touch screen for ODROID-C2 and C1+
It gives users the ability to create all-in-one, integrated projects such as tablets, game consoles, infotainment systems and embedded systems.
Specifications
- 8-inch TFT-LCD
- Resolution: 1024×768 pixels (4:3 ratio)
- finger capacitive touch input (USB ID 18D1:4E12)
- light brightness control with ODROID GPIO PWM
- consumption : 700mA/5Volt (Only LCD and display controller)
- angle : Left 75, Right 75, Up 75, Down 75 degree
- Dimensions : 189 x 149 x 29 mm
- Viewable screen size : 162 x121.5 mm (active area)\
Package include
A. Assembled 8inch TFT LCD + 10 points multi touch screen
B. Plastic bottom case
C. Converter board
D. HDMI dual gender board
E. 8 x 3.5mm screws
F. 2port jumper cable
G. Micro-to-Micro USB Cable (approx. 8cm)
H. Micro-to-TypeA USB Cable (approx. 20cm)
I. 5V/4A Power supply
Usage
Software settings
Touchscreen drivers are available with support for 10 touch points, and proper drivers are integrated in the latest Ubuntu and Android OS images. Screen resolution must be configured to WVGA (1024×768) and the DVI option should be enabled on the “vout” parameter by editing the boot.ini file, as shown in the below.
To use the VU8 on C1/+ Linux system, the Kernel version must be 3.10.80-128 or higher (sudo apt-get update & sudo apt-get dist-upgrade).
1. Resolution configuration.
Edit boot.ini file.
Comment 1080p line out and uncomment the 1024×768 line enable “DVI” option.
. . # setenv m "1080p" # 1080P@60Hz . . setenv m "1024x768p60hz" . . . # HDMI DVI Mode Configuration setenv vout "dvi" for C2 setenv vout_mode "dvi" for C1/C1+/C0
2. Backlight ON/OFF.
Add the following lines into “/etc/rc.local”.
ODROID-C2
path="/sys/class/gpio" echo 234 > $path/export echo 214 > $path/export echo out > $path/gpio234/direction echo out > $path/gpio214/direction echo 0 > $path/gpio234/value echo 0 > $path/gpio214/value
ODROID-C1+/C1/C0
path="/sys/class/gpio" echo 97 > $path/export echo 108 > $path/export echo out > $path/gpio97/direction echo out > $path/gpio108/direction echo 0 > $path/gpio97/value echo 0 > $path/gpio108/value
3. Backlight control with PWM.
GPIO configuration
ODROID-C2
cd /sys/class/gpio echo 214 | sudo tee export echo out | sudo tee gpio214/direction echo 0 | sudo tee gpio214/value echo 234 | sudo tee unexport
ODROID-C1+/C1/C0
cd /sys/class/gpio echo 97 | sudo tee export echo out | sudo tee gpio97/direction echo 0 | sudo tee gpio97/value echo 108 | sudo tee unexport
PWM configuration
Load PWM driver modules.
sudo modprobe pwm-meson sudo modprobe pwm-ctrl
Enable PWM via sysfs.
cd /sys/devices/platform/pwm-ctrl echo 100000 | sudo tee freq0 echo 1 | sudo tee enable0
Set duty cycle
echo [0-1023] | sudo tee duty0