fire-h0und/armbian-3.5tft

Armbian 3.5 TFT screen configuration for various devices

sunxi-tft

Armbian sunxi pc 3.5 tft screen dts file

If you decide to use orangepi with armbian on 3.5" tft screen (driver ili9486) you have to compile and use this file.

How to use

Preliminary steps

Command:

git clone https://github.com/teacupx/armbian-3.5tft

cd armbian-3.5tft

2. Configure overlays

Command:

sudo nano /boot/armbianEnv.txt

Add the following lines to the end of the file:

overlays=spi-spidev spi-add-cs1
param_spidev_spi_bus=0 # Change to 1 for h5
param_spidev_spi_cs=1

Command:

sudo armbian-add-overlay overlays/<file>.dts

Where <file> is the most appropriate overlay for your device

3. Configure modules

Command:

sudo nano /etc/modules-load.d/98-fbtft.conf

Insert the following lines:

fbtft
fbtft_device

Command:

sudo nano /etc/modprobe.d/fbtft.conf

Add the following:

options fbtft_device rotate=90 name=piscreen speed=16000000 gpios=reset:2,dc:71 txbuflen=32768 fps=25

Reboot:

sudo reboot

4. Configure X server

Command:

sudo apt-get install xserver-xorg-video-fbdev

sudo nano /usr/share/X11/xorg.conf.d/99-fbdev.conf

Put this in the file:

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

5. Calibrate touch controller

sudo apt-get install xinput nano /etc/modprobe.d/ads7846_device.conf options ads7846_device model=7846 cs=0 spibus=0 gpio_pendown=1 keep_vref_on=1 swap_xy=0 pressure_max=255 x_plate_ohms=60 x_min=200 x_max=3900 y_min=200 y_max=3900

save and quit

export XAUTHORITY=$(eval echo ~who | grep tty7 | sed 's/\([a-z]*\).*/\1/')/.Xauthority sudo nano /home//.xsessionrc DISPLAY=:0.0 xinput --set-prop 'ADS7846 Touchscreen' 'Coordinate Transformation Matrix' 0 -1 1 1 0 0 0 0 1

After that your screen must be calibrated.