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A member of community has update this guide, (I tested and is working fine), please check it here.

MKS TS35 KlippeScreem port! (WIP)

Notes and guide on how to use MKS TS35 LCD with KlipperScreen

Tested only on FluidPI 1.6.2, can't garantie same steps will work on another image, could not get it working fallowing step by step on mainsailOS

Validaded with: MKS TS35 and MKS TS35-R V2.0

Two Trees Bluer

MKS TS35 Guide for KlipperScreen connected to a raspberry pi via SPI : @willngton

Note: Considering that you already have installed: Klipper + KlipperScreen using KIAUH in a clean Raspbian Lite

  • 1 MKS TS35 Wiring to Raspberry PI (one may connect BEEP pin to any free gpio on PI for M300)
  • Chipset is:
MKS_TS35_V2_0
ADS7843E  / ILI9341  - ST7796
PINOUT
  • 2 Add the fallowing lines on your /boot/config.txt, this will force screen size to match with TS35, enable SPI and tinylcd35 dtoverlay:
  • You can compare your config.txt with the one here that is tested and working, some pre-build images (mainsailOS, fluiddOS) has sone options enable that prevent tiny35 from load, or make a backup and use the oen provides here for teste. Link for working config.txt : https://github.com/willngton/3DPrinterConfig/edit/main/mks_ts35/config.txt
$sudo nano /boot/config.txt

 * add bellow content to the end and salve (crt+x)

###### MKS TS35
hdmi_force_hotplug=1
hdmi_cvt=hdmi_cvt=400 300 60 1 0 0 0
hdmi_group=2
hdmi_mode=1
hdmi_mode=87
display_rotate=0

dtparam=spi=on
dtoverlay=tinylcd35,rotate=270,speed=36000000,touch,touchgpio=23,fps=10 # MKS TS35 Rotated 270 (for fit on Two Trees Bluer)
  • 3 Install rpi-fbcp for screen redirection.
sudo apt-get install cmake
cd ~
sudo git clone https://github.com/tasanakorn/rpi-fbcp
cd rpi-fbcp/
sudo mkdir build
cd build
sudo cmake ..
sudo make
sudo install fbcp /usr/local/bin/fbcp
  • 4 Replace tinylcd35 dtoverlay for the one found on:

https://forums.raspberrypi.com/viewtopic.php?t=281695

https://drive.google.com/file/d/1naCs1F-VGU9CJnzmOeAstpQY-9Bypno2/view?usp=sharing

Download, put the file in klipper document by using WIN SCP. Then replace using the following command (Use the link as tinylcd35.dtbo.2 in the forum instead of 1)

sudo cp tinylcd35.dtbo.2 /boot/overlays/tinylcd35.dtbo
  • 5 Add "fbcp &" to /etc/rc.local or create a service entry

    Use your favorite text editor and add "fbcp &" to your rd.local in order get it up at boot time.

sudo nano /etc/systemd/system/fbcp.service
 
- add the content bellow to the file, note the it will only start after KlipperScreen.service

[Unit]
Description=fbcp
After=KlipperScreen.service
StartLimitIntervalSec=0
[Service]
Type=simple
Restart=always
RestartSec=1
User=root
ExecStart=/usr/local/bin/fbcp

[Install]
WantedBy=multi-user.target

- Save (Ctrl + X) and close.

- Enable services:

sudo systemctl enable fbcp.service

PLEASE Reboot Host and connect back via ssh before next step. (If you are using Pi Zero 2, you may need to unplug the cable and plug in again)

  • 6 Install xserver-xorg-input-evdev
sudo apt-get install xserver-xorg-input-evdev

sudo apt install xserver-xorg-video-fbdev

Touch Screen Configuration - Semi-automated, this will enable touch using ADS7846

Manual process bellow was more based on try-error, fallowing Klipperscreem oficial guide here is a better way.

  • Install xinput-calibrator

    sudo apt install xinput-calibrator

  • Run this command to get your device id:

    DISPLAY=:0 xinput_calibrator --list

output should be something like this:
Device "ADS7846 Touchscreen" id=6

  • Using the ID of your display and put it in the following command:

     DISPLAY=:0 xinput_calibrator -v --device <id from last command>
 
Example: $ DISPLAY=:0 xinput_calibrator -v --device 6

  • Fallow instruction on the screen to calibrate, and save content on file (create one if does not exists:

    $ sudo mkdir -p /etc/X11/xorg.conf.d/
$ sudo nano /etc/X11/xorg.conf.d/99-calibration.conf
Calibration Screen
Calibration Result

Touchscreen touch rotation

If your touchscreen isn't registering touches properly after the screen has been rotated, you will need to apply a transformation matrix. FluiddOS 40-libinput.conf. You can have the matrix be one of the following:

  • 0°: 1 0 0 0 1 0 0 0 1
  • 90° Clockwise: 0 -1 1 1 0 0 0 0 1
  • 90° Counter-Clockwise: 0 1 0 -1 0 1 0 0 1
  • 180°: -1 0 1 0 -1 1 0 0 1

Find session libinput touchscreen catchall on file: sudo nano /usr/share/X11/xorg.conf.d/40-libinput.conf and add transformation matrix, reboot and touch should be calibrated.

Old manual process only for reference

(skip this if you installed fallowed process) Touch Screen Configuration - Manual Process, this will enable touch using ADS7846

if you have issue with calibratoin of the screen due, here is a ellagant solution provided by user: achenakid

#1

  • 7 If does not exists, create a file on /usr/share/X11/xorg.conf.d/99-fbturbo.conf with the fallowing content, you may need to try /dev/fb0 or /dev/fb1 based on if you get output or not.
# This is a minimal sample config file, which can be copied to
# /etc/X11/xorg.conf in order to make the Xorg server pick up
# and load xf86-video-fbturbo driver installed in the system.
#
# When troubleshooting, check /var/log/Xorg.0.log for the debugging
# output and error messages.
# Run "man fbturbo" to get additional information about the extra
# configuration options for tuning the driver.

Section "Device"
        Identifier      "Allwinner A10/A13/A20 FBDEV"
        Driver          "fbturbo"
        Option          "fbdev" "/dev/fb0"
        Option          "SwapbuffersWait" "true"
EndSection
  • 8 If does not exists, create a file on - /etc/X11/xorg.conf.d/99-calibration.conf with the fallowing content.

For Two Trees Bluer, diplay need to be installed rotated 270, therefore calibarion point should be.

Section "InputClass"
        Identifier      "calibration"
        MatchProduct    "ADS7846 Touchscreen"
        Option  "Calibration"   "227 3936 3880 268"
        Option  "SwapAxes"      "1"
        Option "EmulateThirdButton" "1"
        Option "EmulateThirdButtonTimeout" "1000"
        Option "EmulateThirdButtonMoveThreshold" "300"
EndSection

For diplay rotated 270.

Section "InputClass"
        Identifier      "calibration"
        MatchProduct    "ADS7846 Touchscreen"
        Option  "Calibration"   "3936 227 268 3880"
        Option  "SwapAxes"      "1"
        Option "EmulateThirdButton" "1"
        Option "EmulateThirdButtonTimeout" "1000"
        Option "EmulateThirdButtonMoveThreshold" "300"
EndSection
  • 9 Reboot your system

This is based on varius tutorials, if you found a better way to do it, please share.

  • 10 Troubleshooting

You can basically fallow the steps on KlipperScreen documentation: https://klipperscreen.readthedocs.io/en/latest/Troubleshooting/

https://forums.raspberrypi.com/viewtopic.php?t=143581

https://forums.raspberrypi.com/viewtopic.php?t=281695

PI3