TFT 3.5 LCD Raspberry

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Rpi 3.5inch display lcd.png

B421c0e53d336396dc0592f764d0bc27f0341032.png

ESP8266

ESP8266 NodeMCU support for spi interface displays https://github.com/Bodmer/TFT_eSPI

Turėkite omenyje, kad konfigūracija yra globali visiems projektams, nes keičiama pačiame library konfigūraciniame faile. Norint naudotis "per project" konfigūracija, siūlyčiau migruoti į normalesnį IDE -> PlatformIO

Lib konfigūracija Arduino/libraries/TFT_eSPI/User_Setup.h: 

#define RPI_ILI9486_DRIVER
#define SPI_FREQUENCY  20000000
#define TOUCH_CS PIN_D2     // Chip select pin (T_CS) of touch screen

Pajungimo schema:

  • Display SDO/MISO to NodeMCU pin D6
  • Display LED to NodeMCU pin VIN (or 5V)
  • Display SCK to NodeMCU pin D5
  • Display SDI/MOSI to NodeMCU pin D7
  • Display DC (or AO)to NodeMCU pin D3
  • Display RESET to NodeMCU pin D4 (or RST, see below)
  • Display CS to NodeMCU pin D8 (or GND, see below)
  • Display GND to NodeMCU pin GND (0V)
  • Display VCC to NodeMCU 5V or 3.3V
  • Display Touch_CD to NodeMCU pin D1
  • Display T_CS to NodeMCU pin D2

Kitas lib: https://github.com/ZinggJM/ILI9486_SPI

Galima drąsiai išbandyti su projektu: https://github.com/e1z0/WifiAnalyzer

ESP32

Turėkite omenyje, kad konfigūracija yra globali visiems projektams, nes keičiama pačiame library konfigūraciniame faile. Norint naudotis "per project" konfigūracija, siūlyčiau migruoti į normalesnį IDE -> PlatformIO

Lib konfigūracija Arduino/libraries/TFT_eSPI/User_Setup.h 

#define RPI_ILI9486_DRIVER
#define SPI_FREQUENCY  20000000
#define TFT_MISO 19
#define TFT_MOSI 23
#define TFT_SCLK 18
#define TFT_CS   15  // Chip select control pin
#define TFT_DC    2  // Data Command control pin
#define TFT_RST   4  // Reset pin (could connect to RST pin)
#define TOUCH_CS 21     // Chip select pin (T_CS) of touch screen

Pinai atitinka aprašytus ant esp32 esančius fizinius pinus. Kodo pavyzdys: 

#include <SPI.h>

#include <TFT_eSPI.h>       // Hardware-specific library

TFT_eSPI tft = TFT_eSPI();  // Invoke custom library

void setup(void) {
  tft.init();

  tft.setRotation(3);

  tft.fillScreen(TFT_BLACK);
  
  // Set "cursor" at top left corner of display (0,0) and select font 4
  tft.setCursor(0, 0, 4);

  // Set the font colour to be white with a black background
  tft.setTextColor(TFT_WHITE, TFT_BLACK);

  // We can now plot text on screen using the "print" class
  tft.println("Initialised default\n");
  tft.println("White text");
  
  tft.setTextColor(TFT_RED, TFT_BLACK);
  tft.println("Red text");
  
  tft.setTextColor(TFT_GREEN, TFT_BLACK);
  tft.println("Green text");
  
  tft.setTextColor(TFT_BLUE, TFT_BLACK);
  tft.println("Blue text");

  delay(5000);

}

void loop() {

  tft.invertDisplay( false ); // Where i is true or false
 
  tft.fillScreen(TFT_BLACK);
  
  tft.setCursor(0, 0, 4);

  tft.setTextColor(TFT_WHITE, TFT_BLACK);
  tft.println("Invert OFF\n");

  tft.println("White text");
  
  tft.setTextColor(TFT_RED, TFT_BLACK);
  tft.println("Red text");
  
  tft.setTextColor(TFT_GREEN, TFT_BLACK);
  tft.println("Green text");
  
  tft.setTextColor(TFT_BLUE, TFT_BLACK);
  tft.println("Blue text");

  delay(5000);


  // Binary inversion of colours
  tft.invertDisplay( true ); // Where i is true or false
 
  tft.fillScreen(TFT_BLACK);
  
  tft.setCursor(0, 0, 4);

  tft.setTextColor(TFT_WHITE, TFT_BLACK);
  tft.println("Invert ON\n");

  tft.println("White text");
  
  tft.setTextColor(TFT_RED, TFT_BLACK);
  tft.println("Red text");
  
  tft.setTextColor(TFT_GREEN, TFT_BLACK);
  tft.println("Green text");
  
  tft.setTextColor(TFT_BLUE, TFT_BLACK);
  tft.println("Blue text");

  delay(5000);
}

Metodas (su gfx akseleracija) be touchscreen

apt-get install cmake git
git clone https://github.com/juj/fbcp-ili9341.git
cd fbcp-ili9341
mkdir build
cd build
cmake -DILI9486=ON -DSPI_BUS_CLOCK_DIVISOR=6 ..
make -j
sudo ./fbcp-ili9341

Patvirtintas metodas su touchscreen

/boot/config.txt

dtparam=spi=on
dtparam=i2c_arm=on
dtoverlay=piscreen2r,speed=16000000,rotate=270

/boot/cmdline.txt

Pridedam į galą branduolio parametrų eilutės: 

fbcon=map:10 fbcon=font:VGA2x2


pygameui fix (raspbian jessie)

The package "libsdl1.2-15-10", which ships with Debian Jessie, breaks pygame. To make it work we have to revert back to "libsdl1.2-15-5" from Wheezy.

The quickest way is to comment everything out in your /etc/apt/sources.list and temporarily add: 

deb http://archive.raspbian.org/raspbian wheezy main contrib non-free

Import the corresponding keys: 

deb http://archive.raspbian.org/raspbian wheezy main contrib non-free
gpg -a --export 9165938D90FDDD2E | sudo apt-key add -

Remove the offending package and replace it with the working one: 

sudo apt-get update
sudo apt-get remove libsdl1.2debian python-pygame
apt-get install libsdl-image1.2 libsdl-mixer1.2 libsdl-ttf2.0-0 libsdl1.2debian libsmpeg0 python-pygame
sudo apt-mark hold libsdl1.2debian

Restore "/etc/apt/sources.list" to it's original state.

pygameui fix (raspbian stretch)

Downgradiname paketa ir nepamirstame is naujo perkalibruoti touchscreen. 

TSLIB_FBDEVICE=/dev/fb1 TSLIB_TSDEVICE=/dev/input/event0 TSLIB_CALIBFILE=/etc/pointercal TSLIB_CONFFILE=/etc/ts.conf TSLIB_PLUGINDIR=/usr/lib/ts ts_calibrate

Binary Install way

wget http://devnull.eofnet.lt/stuff/raspbian_wheezy/libsdl1.2-dev_1.2.15-5~bpo9%2B1_armhf.deb
wget http://devnull.eofnet.lt/stuff/raspbian_wheezy/libsdl1.2debian_1.2.15-5~bpo9%2B1_armhf.deb
dpkg -i libsdl1.2debian_1.2.15-5~bpo9+1_armhf.deb 
dpkg -i libsdl1.2-dev_1.2.15-5~bpo9+1_armhf.deb

Source install way

mkdir /root/sources
cd /root/sources
wget http://legacy.raspbian.org/raspbian/pool/main/libs/libsdl1.2/libsdl1.2_1.2.15.orig.tar.gz
wget http://legacy.raspbian.org/raspbian/pool/main/libs/libsdl1.2/libsdl1.2_1.2.15-5.debian.tar.gz

Or use my mirror 

wget http://devnull.eofnet.lt/stuff/raspbian_wheezy/libsdl1.2_1.2.15-5.debian.tar.gz
http://devnull.eofnet.lt/stuff/raspbian_wheezy/libsdl1.2_1.2.15.orig.tar.gz
tar xzvf libsdl1.2_1.2.15.orig.tar.gz
tar xzvf libsdl1.2_1.2.15-5.debian.tar.gz
mv debian SDL-1.2.15/
cd SDL-1.2.15

Install dependencies to build the packages 

apt-get install packaging-dev debian-keyring devscripts equivs

Prepare the package deps 

mk-build-deps --install

Add the revision to the change file, report the backporting 

dch --bpo

Build the package 

fakeroot debian/rules binary
dpkg-buildpackage -us -uc

Now you can install the package 

dpkg -i ../libsdl1.2debian_1.2.15-5~bpo9+1_armhf.deb 
dpkg -i ../libsdl1.2-dev_1.2.15-5~bpo9+1_armhf.deb

/etc/X11/xorg.conf.d/99-ads7846-cal.conf

Section "InputClass"
       Identifier      "calibration"
       MatchProduct    "ADS7846 Touchscreen"
       Option	"Calibration"	"3950 253 254 3971"
       Option  "SwapAxes"      "0"
       driver "evdev"
EndSection

Išimam iš konfigūracinių failų esančių /usr/share/X11/xorg.conf.d/ touchscreen interfeisus pvz. 40-libinput.conf esantis su Driver "libinput", būtina jį pašalinti, galima taip pat padaryti, kad naudotų draiverį "evdev". Pakeičiam 99-fbturbo.conf esantį fb0 į fb1

Failai iš /usr/share/X11/xorg.conf.d/

10-amdgpu.conf

 Section "OutputClass"
	Identifier "AMDgpu"
	MatchDriver "amdgpu"
	Driver "amdgpu"
 EndSection

10-evdev.conf

 Section "InputClass"
        Identifier "evdev pointer catchall"
        MatchIsPointer "on"
        MatchDevicePath "/dev/input/event*"
        Driver "evdev"
 EndSection

 Section "InputClass"
        Identifier "evdev keyboard catchall"
        MatchIsKeyboard "on"
        MatchDevicePath "/dev/input/event*"
        Driver "evdev"
 EndSection

 Section "InputClass"
        Identifier "evdev touchpad catchall"
        MatchIsTouchpad "on"
        MatchDevicePath "/dev/input/event*"
        Driver "evdev"
 EndSection

 Section "InputClass"
        Identifier "evdev tablet catchall"
        MatchIsTablet "on"
        MatchDevicePath "/dev/input/event*"
        Driver "evdev"
 EndSection

 Section "InputClass"
        Identifier "evdev touchscreen catchall"
        MatchIsTouchscreen "on"
        MatchDevicePath "/dev/input/event*"
        Driver "evdev"
 EndSection

10-quirks.conf

# Collection of quirks and blacklist/whitelists for specific devices.


# Accelerometer device, posts data through ABS_X/ABS_Y, making X unusable
# http://bugs.freedesktop.org/show_bug.cgi?id=22442 
Section "InputClass"
        Identifier "ThinkPad HDAPS accelerometer blacklist"
        MatchProduct "ThinkPad HDAPS accelerometer data"
        Option "Ignore" "on"
EndSection

# https://bugzilla.redhat.com/show_bug.cgi?id=523914
# Mouse does not move in PV Xen guest
# Explicitly tell evdev to not ignore the absolute axes.
Section "InputClass"
        Identifier "Xen Virtual Pointer axis blacklist"
        MatchProduct "Xen Virtual Pointer"
        Option "IgnoreAbsoluteAxes" "off"
        Option "IgnoreRelativeAxes" "off"
EndSection

# https://bugs.freedesktop.org/show_bug.cgi?id=55867
# Bug 55867 - Doesn't know how to tag XI_TRACKBALL
Section "InputClass"
        Identifier "Tag trackballs as XI_TRACKBALL"
        MatchProduct "trackball"
        MatchDriver "evdev"
        Option "TypeName" "TRACKBALL"
EndSection

# https://bugs.freedesktop.org/show_bug.cgi?id=62831
# Bug 62831 - Mionix Naos 5000 mouse detected incorrectly
Section "InputClass"
        Identifier "Tag Mionix Naos 5000 mouse XI_MOUSE"
        MatchProduct "La-VIEW Technology Naos 5000 Mouse"
        MatchDriver "evdev"
        Option "TypeName" "MOUSE"
EndSection

40-libinput.conf

# Match on all types of devices but tablet devices and joysticks
Section "InputClass"
        Identifier "libinput pointer catchall"
        MatchIsPointer "on"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
EndSection

Section "InputClass"
        Identifier "libinput keyboard catchall"
        MatchIsKeyboard "on"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
EndSection

Section "InputClass"
        Identifier "libinput touchpad catchall"
        MatchIsTouchpad "on"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
EndSection

Section "InputClass"
        Identifier "libinput tablet catchall"
        MatchIsTablet "on"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
EndSection

70-wacom.conf

# Some of the below input classes appear 3x times, once for each of
# "tablet", "touchscreen", and "touchpad" to ensure that the Wacom
# driver is not accidentally bound to other types of hardware that
# Wacom has made which are not handled by the wacom driver (e.g the
# Wacom Bluetooth Keyboard)
#
# https://sourceforge.net/p/linuxwacom/bugs/294/

Section "InputClass"
        Identifier "Wacom USB tablet class"
        MatchUSBID "056a:*"
        MatchDevicePath "/dev/input/event*"
        MatchIsTablet "true"
        Driver "wacom"
EndSection

Section "InputClass"
        Identifier "Wacom USB touchscreen class"
        MatchUSBID "056a:*"
        MatchDevicePath "/dev/input/event*"
        MatchIsTouchscreen "true"
        Driver "wacom"
EndSection

Section "InputClass"
        Identifier "Wacom USB touchpad class"
        MatchUSBID "056a:*"
        MatchDevicePath "/dev/input/event*"
        MatchIsTouchpad "true"
        Driver "wacom"
EndSection

Section "InputClass"
	Identifier "Wacom tablet class"
	MatchProduct "Wacom|WACOM|PTK-540WL|ISD-V4"
	MatchDevicePath "/dev/input/event*"
	MatchIsTablet "true"
	Driver "wacom"
EndSection

Section "InputClass"
	Identifier "Wacom touchscreen class"
	MatchProduct "Wacom|WACOM|PTK-540WL|ISD-V4"
	MatchDevicePath "/dev/input/event*"
	MatchIsTouchscreen "true"
	Driver "wacom"
EndSection

Section "InputClass"
	Identifier "Wacom touchpad class"
	MatchProduct "Wacom|WACOM|PTK-540WL|ISD-V4"
	MatchDevicePath "/dev/input/event*"
	MatchIsTouchpad "true"
	Driver "wacom"
EndSection

# Serial Wacom devices should always be one of tablet, touchscreen, or
# touchpad so we can safely get away with just one match section in
# these cases
Section "InputClass"
        Identifier "Wacom PnP device class"
        MatchPnPID "WACf*|WCOM*|WACM*|FUJ02e5|FUJ02e7|FUJ02e9"
        MatchDevicePath "/dev/input/event*"
        Driver "wacom"
EndSection

Section "InputClass"
	Identifier "Wacom serial class"
	MatchProduct "Serial Wacom Tablet"
	Driver "wacom"
EndSection

Section "InputClass"
        Identifier "Wacom serial class identifiers"
        MatchProduct "WACf|FUJ02e5|FUJ02e7|FUJ02e9"
        Driver "wacom"
EndSection

# Hanwang tablets
Section "InputClass"
	Identifier "Hanwang class"
	MatchProduct "Hanwang"
	MatchDevicePath "/dev/input/event*"
	Driver "wacom"
EndSection

# Waltop tablets
Section "InputClass"
	Identifier "Waltop class"
	MatchProduct "WALTOP"
	MatchIsTablet "on"
	MatchDevicePath "/dev/input/event*"
	Driver "wacom"
EndSection

# N-Trig Duosense Electromagnetic Digitizer
Section "InputClass"
	Identifier "Wacom N-Trig class"
	MatchProduct "HID 1b96:0001|N-Trig Pen|N-Trig DuoSense"
	MatchDevicePath "/dev/input/event*"
	Driver "wacom"
	Option "Button2" "3"
EndSection

799-fbturbo.conf

Section "Device"
        Identifier      "Allwinner A10/A13 FBDEV"
        Driver          "fbturbo"
        Option          "fbdev" "/dev/fb1"

#        Option          "SwapbuffersWait" "true"
EndSection

Kataloge /etc/X11/xorg.conf.d/ failų apart mūsų įdeto 99-ads7846-cal.conf daugiau nėra.

Kivy GUI toolkit

Prieš pradėdami, atnaujiname sistemą: 

pi@raspberrypi ~ $ sudo apt-get update && sudo apt-get -y upgrade

Perkrauname: 

pi@raspberrypi ~ $ sudo reboot

Įdiegiame paketus 

pi@raspberrypi ~ $ sudo apt-get -y libffi-dev install libpango1.0-dev libcogl-pango-dev libsdl2-ttf-dev libsdl2-mixer-dev libsdl2-image-dev libsdl2-gfx-dev libsdl2-dev libsdl-ttf2.0-dev libsdl-sge-dev libsdl-pango-dev libsdl-ocaml-dev  libsdl-console-dev libsdl2-dev libsdl2-image-dev libsdl2-mixer-dev libsdl2-ttf-dev \
  pkg-config libgl1-mesa-dev libgles2-mesa-dev \
  python-setuptools libgstreamer1.0-dev git-core \
  gstreamer1.0-plugins-{bad,base,good,ugly} \
  gstreamer1.0-{omx,alsa} python-dev libmtdev-dev \
  xclip xsel

Įdiegiame pip iš source 

pi@raspberrypi ~ $ curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
pi@raspberrypi ~ $ sudo python get-pip.py

Įdiegiame kitus reikalingus paketus: 

pi@raspberrypi ~ $ pip install -U Cython==0.28.2
pi@raspberrypi ~ $ sudo pip install pygments docutils

Pagaliau galime įdiegti kivy: 

pi@raspberrypi ~ $ git clone https://github.com/kivy/kivy
pi@raspberrypi ~ $ cd kivy
pi@raspberrypi ~/kivy $ python setup.py build
pi@raspberrypi ~/kivy $ sudo python setup.py install

Norint įgalinti touchscreen reikia padaryti keletą modifikacijų kivy konfigūraciniame faile, pirmiausia paleiskime: 

pi@raspberrypi ~/kivy $ python ~/kivy/examples/demo/pictures/main.py

Bus sukurtas kivy konfigūracinis failas, kurį atsidarysime: 

pi@raspberrypi ~/kivy $ nano ~/.kivy/config.ini

Einame į [input] sekciją, išimame esančias eilutes ir pridedame šias: 

mouse = mouse
mtdev_%(name)s = probesysfs,provider=mtdev
hid_%(name)s = probesysfs,provider=hidinput

Paleidžiame kitą demo ir išbandome (patampome, paspaudžiame, bandome tempti): 

pi@raspberrypi ~/kivy $ python ~/kivy/examples/demo/pictures/main.py

Išbandome kitus demo: 

pi@raspberrypi ~/kivy $ python ~/kivy/examples/demo/showcase/main.py

Taip pat yra daugelis kitų direktorijoje ~/kivy/examples/.

FIXME

Reziume gauname totalų šūdą kuris segfaultina norint paleisti be X'o... Laukiam kol sutvarkys kivy, jog veiktu be Xorg palaikymo, tik sdl'e.

raylib-go

apt-get update&&apt-get install libbsd-dev
rpi-update
wget https://dl.google.com/go/go1.12.5.linux-armv6l.tar.gz
tar -C /usr/local -xzf go1.12.5.linux-armv6l.tar.gz

Sudedame į /etc/profile ir /root/.bashrc: 

export GOPATH=$HOME/go
export RPI_HOME=/opt/tools/arm-bcm2708/arm-linux-gnueabihf
export PATH=${RPI_HOME}/bin:/usr/local/go/bin:$PATH:$GOPATH/bin

Sudiegiame biblioteką 

go get github.com/gen2brain/raylib-go/raylib

Sudedam mirrorinima i mūsų LCD: 

git clone https://github.com/AndrewFromMelbourne/raspi2fb.git
cd raspi2fb&&mkdir build&&cd build&&cmake ..&&make&&make install

Taip pat reiktų nustatyti LCD rezoliuciją į mažesnę, kadangi mirrorinimas HDMI išėjimo į rezoliuciją pvz.: 480x320, bus nelabai įskaitomas. Prirašome eilutę į /boot/config.txt: 

hdmi_cvt 480 320 60 1 0 0 0
framebuffer_width=480
framebuffer_height=320

Paleidžiame mirrorinimą: 

/usr/local/bin/raspi2fb --daemon

Padarome, kad mirrorinimas vyktų sistemos startavimo metu: 

cd ..&&mv raspi2fb\@.service /etc/systemd/system/&&systemctl daemon-reload&&systemctl enable raspi2fb@1.service

Sukalibruojame ekrana: 

TSLIB_FBDEVICE=/dev/fb1 TSLIB_TSDEVICE=/dev/input/event0 TSLIB_CALIBFILE=/etc/pointercal TSLIB_CONFFILE=/etc/ts.conf TSLIB_PLUGINDIR=/usr/lib/ts ts_calibrate

Taip pat sukuriame tslib pagalba naują touchscreen input: 

TSLIB_FBDEVICE=/dev/fb1 TSLIB_TSDEVICE=/dev/input/event0 TSLIB_CALIBFILE=/etc/pointercal TSLIB_CONFFILE=/etc/ts.conf TSLIB_PLUGINDIR=/usr/lib/ts ts_uinput -v -d

/dev/input/event0 yra mūsų touchscreen (Įsitikinkite, kad ten būtent jis), paleidus turėtų ateiti grąžinimas pvz.: 

/dev/input/event1

Tai ir bus mūsų naujas event device'as 

package main

import "github.com/gen2brain/raylib-go/raylib"

func main() {
	rl.InitWindow(800, 450, "raylib [rpi] example - basic window")

	rl.SetTargetFPS(60)

	for !rl.WindowShouldClose() {
		rl.BeginDrawing()

		rl.ClearBackground(rl.RayWhite)

		rl.DrawText("Congrats! You created your first window!", 190, 200, 20, rl.LightGray)

		rl.EndDrawing()
	}

	rl.CloseWindow()
}

go build main.go
./main


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