/waveshare-3.5-Spotpear-for-Rpi

files for installation of WaveShare 35Inch LCD on Raspbian

Primary LanguageShell

#README

LCD Screen Setup

1.Expand the filesystem

sudo raspi-config

2.Change fb0 to fb1

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

3.Enable SPI if needed

# remove or comment out the spi blacklist line
sudo nano /etc/modprobe.d/raspi-blacklist.conf

4.FBTFT drivers as loadable modules

sudo REPO_URI=https://github.com/notro/rpi-firmware rpi-update
sudo reboot

5.Test (After second command, screen is not white anymore)

sudo modprobe flexfb  width=320  height=480  regwidth=16 init=-1,0xb0,0x0,-1,0x11,-2,250,-1,0x3A,0x55,-1,0xC2,0x44,-1,0xC5,0x00,0x00,0x00,0x00,-1,0xE0,0x0F,0x1F,0x1C,0x0C,0x0F,0x08,0x48,0x98,0x37,0x0A,0x13,0x04,0x11,0x0D,0x00,-1,0xE1,0x0F,0x32,0x2E,0x0B,0x0D,0x05,0x47,0x75,0x37,0x06,0x10,0x03,0x24,0x20,0x00,-1,0xE2,0x0F,0x32,0x2E,0x0B,0x0D,0x05,0x47,0x75,0x37,0x06,0x10,0x03,0x24,0x20,0x00,-1,0x36,0x28,-1,0x11,-1,0x29,-3

sudo modprobe fbtft_device debug=3 rotate=90 name=flexfb speed=16000000 gpios=reset:25,dc:24

6.Perminantly add Driver

#Add to file /etc/modules
flexfb  width=320  height=480  regwidth=16 init=-1,0xb0,0x0,-1,0x11,-2,250,-1,0x3A,0x55,-1,0xC2,0x44,-1,0xC5,0x00,0x00,0x00,0x00,-1,0xE0,0x0F,0x1F,0x1C,0x0C,0x0F,0x08,0x48,0x98,0x37,0x0A,0x13,0x04,0x11,0x0D,0x00,-1,0xE1,0x0F,0x32,0x2E,0x0B,0x0D,0x05,0x47,0x75,0x37,0x06,0x10,0x03,0x24,0x20,0x00,-1,0xE2,0x0F,0x32,0x2E,0x0B,0x0D,0x05,0x47,0x75,0x37,0x06,0x10,0x03,0x24,0x20,0x00,-1,0x36,0x28,-1,0x11,-1,0x29,-3

fbtft_device debug=3 rotate=90 name=flexfb speed=16000000 gpios=reset:25,dc:24

7.Additional settings

#/boot/config.txt
gpu_mem=128

#/boot/cmdline.txt
fbcon=map:1 fbcon=font:ProFont6x11

Enabling touchscreen

  1. Install libraries
sudo apt-get -y install xinput evtest libts-bin
  1. Add device to /etc/modules
ads7846_device model=7846 cs=1 gpio_pendown=17  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
  1. Get calibration parameters
wget http://adafruit-download.s3.amazonaws.com/xinput-calibrator_0.7.5-1_armhf.deb

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

sudo rm /usr/share/X11/xorg.conf.d/99-calibration.conf

sudo reboot

After reboot type startx and open xterminal then run the calibration tool

DISPLAY=:0.0 xinput_calibrator

Edit 99-calibration using the new parameters, e.g.

Section "InputClass"
	Identifier "calibration"
	MatchProduct "ADS7846 Touchscreen"
	Option "Calibration" "3873 272 236 3868"
	Option  "SwapAxes"      "1"
EndSection

##Installing onscreen keyboard

  1. Download and install the debian package (do not get from repos)
wget http://ftp.us.debian.org/debian/pool/main/m/matchbox-keyboard/matchbox-
keyboard_0.1+svn20080916-9+b1_armhf.deb
  1. Create a toogle script to avoid multiple instances
#!/bin/bash

PID=$(pidof matchbox-keyboard)
if [ ! -e $PID ]; then
        killall matchbox-keyboard
else
        matchbox-keyboard -s 80 extended&
fi


$ sudo chmod +x /usr/bin/toggle-matchbox-keyboard.sh

buggy in Openbox

Additional stuff

  1. Auto-login: edit $ sudo nano /etc/inittab as shown
#1:2345:respawn:/sbin/getty --noclear 38400 tty1
1:2345:respawn:/bin/login -f pi tty </dev/tty1 >/dev/tty1 2>&1
  1. Startx by default

Add the following lines before exit 0 in /etc/rc.local 

echo -e '[NOTICE] Press any key NOW to cancel startx...'
read -n 1 -t 3 ANY_KEY

if [ "$ANY_KEY" == "" ]; then
  su -l pi -c startx
else
  echo -e '[NOTICE] startx stopped'
fi

Sources :

[1] notro/fbtft#215

[2] http://ozzmaker.com/2014/06/30/virtual-keyboard-for-the-raspberry-pi/

[3] http://www.raspberrypi.org/forums/viewtopic.php?f=66&t=14719