[LINUX] Use Majoca Iris elongated LCD with Raspberry Pi

About this article

Apply the mod driver to fbtft that uses the mechanism of Raspberry Pi's Linux framebuffer, and send the image to the elongated LCD.

I'm satisfied with this response for the time being w

If it becomes a frame buffer, startx will also be used for the desktop. Open at 640x48 (taskbar is too big, but w)

After that, can I bring it to the point where I can publish the source ...

If it is a problem that can be solved by reading the source, let's read it for the time being pic.twitter.com/Ybi5M4v6Fi

& mdash; Debe (@devemin) January 18, 2021

Python PIL library

Let's do C pic.twitter.com/xwya0SgBRe

& mdash; Debe (@devemin) January 19, 2021

Repository

Click here for wiring and installation methods

→　https://github.com/devemin/fbtft

@devemin Thank you very much! !!

I can't do anything, so I made a "majoca Iris LCD --Raspi GPIO cheat sheet" (reprint free) to make GPIO wiring easier.

Everyone, even with Raspberry Pi #Majoca Iris Hack ! !! https://t.co/ATRszPNwxS https: // t .co/X5rBNuAt4T pic.twitter.com/itzcdFO7cR

& mdash; Komikoni @ LOVE_THE_WORLD (@komikoni) January 20, 2021

Thanks !! Twitter @komikoni (Corrected official image of CC BY-SA) https://www.raspberrypi.org/documentation/usage/gpio/

@devemin Thank you very much! !!

I can't do anything, so I made a "majoca Iris LCD --Raspi GPIO cheat sheet" (reprint free) to make GPIO wiring easier.

Everyone, even with Raspberry Pi #Majoca Iris Hack ! !! https://t.co/ATRszPNwxS https: // t .co/X5rBNuAt4T pic.twitter.com/itzcdFO7cR

& mdash; Komikoni @ LOVE_THE_WORLD (@komikoni) January 20, 2021

environment

Raspberry Pi 4 8gB / 2021-1-11 released Raspberry Pi OS, kernel 5.4.83-v7l + Raspberry Pi 3B + / 2021-1-11 released Raspberry Pi OS, kernel 5.4.83-v7 + Raspberry Pi 3B + / 2019-4-8 released Raspian OS, kernel 4.14.98-v7 +

Majoca Iris elongated LCD Power supply (about 6V for brown board LCD, about 12V for green board LCD?) https://github.com/htlabnet/inside_magimajopures/wiki/sushi_chika

Various frame buffer software

reference: https://github.com/notro/fbtft/wiki/Framebuffer-use

fbcp The desktop is reduced to a slender LCD.

sudo apt-get install cmake
git clone https://github.com/tasanakorn/rpi-fbcp
cd rpi-fbcp/
mkdir build
cd build/
cmake ..
make
./fbcp

fbtest Benchmark test app.

sudo apt-get install libnetpbm10-dev
git clone https://git.kernel.org/pub/scm/linux/kernel/git/geert/fbtest.git
cd fbtest
make
./fbtest -f /dev/fb1

con2fbmap Run the console on an elongated LCD instead of a regular screen. (It seems that the screen update is buggy)

sudo raspi-config
# 1.If you select console only for Boot in system, the console screen will appear the next time you reboot.

So after loading the driver again,

con2fbmap 1 1
#Console display on the slender LCD (top command etc. can be seen at the last minute)
con2fbmap 1 0
#Return to the normal screen with
#To return to desktop startup, sudo raspi again-In config, again 1.Set to GUI auto login with Boot of system

X11 startx You can project the desktop screen on an elongated LCD instead of reducing the display. (It is strict even if the taskbar is set thin, but w)

sudo apt-get install xserver-xorg-video-fbdev
sudo mousepad (or leafpad ) /usr/share/X11/xorg.conf.d/99-fbdev.conf

#Save the following contents
Section "Device"  
  Identifier "myfb"
  Driver "fbdev"
  Option "fbdev" "/dev/fb1"
EndSection

#After loading the driver
FRAMEBUFFER=/dev/fb1 startx