Taisomas TFT 3.5 LCD Raspberry

[[Vaizdas:Rpi 3.5inch display lcd.png|900px]]

[[Vaizdas: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

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

= 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

TFT Taip pat gali veikti kartu su SD Kortele pagal [[sd card module|šį aprašymą]], abu moduliai naudos skirtingus SPI interfeisus, todėl nesipyks tarpusavyje.
Pinai atitinka aprašytus ant esp32 esančius fizinius pinus. Kodo pavyzdys:
<syntaxhighlight lang="cpp">
#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);
}
</syntaxhighlight>

= 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  ===
<syntaxhighlight lang="text">
 Section "OutputClass"
	Identifier "AMDgpu"
	MatchDriver "amdgpu"
	Driver "amdgpu"
 EndSection
</syntaxhighlight>
=== 10-evdev.conf ===
<syntaxhighlight lang="text">
 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
</syntaxhighlight>

=== 10-quirks.conf ===
<syntaxhighlight lang="text">
# 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
</syntaxhighlight>

=== 40-libinput.conf ===
<syntaxhighlight lang="text">
# 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
</syntaxhighlight>

=== 70-wacom.conf ===
<syntaxhighlight lang="text">
# 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
</syntaxhighlight>

=== 799-fbturbo.conf ===
<syntaxhighlight lang="text">
Section "Device"
        Identifier      "Allwinner A10/A13 FBDEV"
        Driver          "fbturbo"
        Option          "fbdev" "/dev/fb1"

#        Option          "SwapbuffersWait" "true"
EndSection
</syntaxhighlight>

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
 
<syntaxhighlight lang="go">
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()
}
</syntaxhighlight>

 go build main.go
 ./main


[[Category:RaspberryPI]]
[[Category:Raspbian]]
[[Category:ESP8266]]
[[Category:ESP32]]
[[Category:Hardware]]
[[Category:OrangePI]]