Repetier Server with Hyperpixel 4 touchscreen?

theelectricmayhem · April 2019

Has anyone had any luck using the Pimoroni Hyperpixel 4 with Repetier Server? The Hyperpixel install script works just fine on a standard Raspbian install, but for some reason when I run it on the Repetier Server Raspberry Pi image, the display refuses to work, despite the install script completing without error. There's something in the Repetier Server image that disagrees with the Hyperpixel, but I have no idea what. Any ideas?

Repetier · April 2019

Good question. We also are based on Raspbian strech light to have less unused software. We have openbox as window manager and start x server with login at end of pi users .bashrc file.

I know from other frame buffer displays that they need to set a different target frame for x server in a fturbo... file. Maybe that is just what you are missing, so it still uses the hdmi output.

cosmith71 · April 2020

Anyone get this to work? I'm trying to get this excellent display to work with a Pi 4.

Same as above. Installer seems to run, but black display.

Repetier · April 2020

As far as I see it is a framebuffer display. So it will not show what is on hdmi output which is programmed target of x server (framebuffer 0 /dev/fb0). Check if you have also /dev/fb1 which is your display. You must configure x to show it or copy fb0 to fb1 buffer. See https://medium.com/@avik.das/writing-gui-applications-on-the-raspberry-pi-without-a-desktop-environment-8f8f840d9867 for example. Might help understanding the problem. But don't have the display so never tried for a solution.

cosmith71 · April 2020

I am actually looking at that page right as you replied. I'm pretty lost, but it looks like there are no fb devices (only the Hyperpixel connected). I got it running on Buster, so maybe I can look at the fbturbo file to see how it's set up.

Repetier · April 2020

You mean the is only on /dev/fb... device on your pi? fb0 is the hdmi output. Our images are already on the newer stretch - so did it load the hyperpixel modules there?

cosmith71 · April 2020

I thought Buster was newest? The Repetier-Server Pi image seems to be Buster.

With a new Repetier Pi image and the HyperPixel installed (no HDMI connected) there are no FB devices in /dev. With HDMI plugged in, there is only FB0.

This thing is giving me a headache.

cosmith71 · April 2020

After 3 days and 1 broken screen, I finally got the HyperPixel working on a Pi 4 with Repetier-Server. It turned out to be a simple fix.

Note, I'm using a wired Ethernet connection.

Flash Repetier-Server to an SD card.
Add an empty ssh file under /boot to enable ssh
Put it in the Pi and boot it up
ssh in, change the pi password.
Install the HyperPixel 4 drivers:

curl https://get.pimoroni.com/hyperpixel4 | bash

Choose option 1, Pi 4 with rectangular screen
Yes when asked are you sure
Reboot

hyperpixel-rotate left

Ignore the error message.

sudo nano /boot/config.txt

Add [all] and display_lcd_rotate=3 so that the end of config.txt looks like this:

[all]
dtoverlay=hyperpixel4
gpio=0-25=a2
enable_dpi_lcd=1
dpi_group=2
dpi_mode=87
dpi_output_format=0x7f216
dpi_timings=480 0 10 16 59 800 0 15 113 15 0 0 0 60 0 32000000 6
display_rotate=3

Reboot and Repetier-Server should come up on the HyperPixel.

The sticking point turned out to be the [all]. The driver installer adds the other stuff (except the rotate) to the end of config.txt, but there is a [pi0] filter at the end of the stock Repetier config.sys that was ignoring the screen instructions. Adding the [all] terminates the [pi0] filter and allows it to work.

https://www.thingiverse.com/make:797369

Repetier · April 2020

You are right buster came after stretch. Thanks for the update. So the [all] missing prevented the overlay from being loaded.

cosmith71 · April 2020

That was it. These are really nice screens. And I learned a few things, too.

NickRno77 · September 2020

cosmith71 said:
After 3 days and 1 broken screen, I finally got the HyperPixel working on a Pi 4 with Repetier-Server. It turned out to be a simple fix.
Note, I'm using a wired Ethernet connection.
Flash Repetier-Server to an SD card.
Add an empty ssh file under /boot to enable ssh
Put it in the Pi and boot it up
ssh in, change the pi password.
Install the HyperPixel 4 drivers:
curl https://get.pimoroni.com/hyperpixel4 | bash
Choose option 1, Pi 4 with rectangular screen
Yes when asked are you sure
Reboot
hyperpixel-rotate left
Ignore the error message.
sudo nano /boot/config.txt
Add [all] and display_lcd_rotate=3 so that the end of config.txt looks like this:
[all]
dtoverlay=hyperpixel4
gpio=0-25=a2
enable_dpi_lcd=1
dpi_group=2
dpi_mode=87
dpi_output_format=0x7f216
dpi_timings=480 0 10 16 59 800 0 15 113 15 0 0 0 60 0 32000000 6
display_rotate=3
Reboot and Repetier-Server should come up on the HyperPixel.
The sticking point turned out to be the [all]. The driver installer adds the other stuff (except the rotate) to the end of config.txt, but there is a [pi0] filter at the end of the stock Repetier config.sys that was ignoring the screen instructions. Adding the [all] terminates the [pi0] filter and allows it to work.
https://www.thingiverse.com/make:797369

Thanks I had trouble until i read your solution. Thanks

Gigadee · January 2021

Hey all, I see this thread is a bit old, but I am having issues with this exact install setup and am looking for help after all day banging my head on it.

RPi4, HyperPixel4, I can get it to install fine on a standard raspian installation, but I cannot for the life of me get it to even finish the hyperpixel script with the Repetier Server installed. It either returns a

main: line 116: /dev/tty: Permission denied

or an Unrecognized hardware error. Screen works great with everything else I've tried. Octoprint, Octodash.

Any thoughts?

Will also open a new thread for visibility, but thought I'd ply the knowledge amongst you folks as well.

genos · January 2022

Hey guys, I spend some hours to figure out how to get the Hyperpixel 4 running with my Pi4.
Want to share my results to help the next ones with trouble to get this thing running.
So long story short I want to build this, but running repetier instead of Octoprint: https://www.prusaprinters.org/prints/69731-hyperpixel-4-touchscreen-lcd-raspberry-pi4-for-oct/files

Just to repeat what cosmith71 already descripbed

Install the HyperPixel 4 drivers:

curl https://get.pimoroni.com/hyperpixel4 | bash

Choose option 2, Pi 4 with rectangular screen (changed with the latest update)
Yes when asked are you sure
Reboot

hyperpixel-rotate left

Ignore the error message.

sudo nano /boot/config.txt

Add [all] and display_lcd_rotate=3 so that the end of config.txt looks like this:
As well you need to make some other tweaks as well.
first kill dtoverlay=vc4-fkms-v3d with an # in the config.txt, this cause trouble.
then add also touchscreen-swapped-x-y, touchscreen-inverted-x, touchscreen-inverted-y based on your display orientation.
In my case it will look like this:

[pi4]
# Enable DRM VC4 V3D driver on top of the dispmanx display stack
#display_lcd_rotate=3
#dtoverlay=vc4-fkms-v3d
max_framebuffers=2

[all]
#dtoverlay=vc4-fkms-v3d
start_x=gpu_mem=128

dtoverlay=hyperpixel4,touchscreen-swapped-x-y,touchscreen-inverted-x
#dtoverlay=hyperpixel4
gpio=0-25=a2
enable_dpi_lcd=1
dpi_group=2
dpi_mode=87
dpi_output_format=0x7f216
dpi_timings=480 0 10 16 59 800 0 15 113 15 0 0 0 60 0 32000000 6
display_rotate=3
#display_lcd_rotate=3

Reboot and Repetier-Server should come up on the HyperPixel as well with all touchscreen function.

Hope that will help somebody else to not spend to much time to figure it out and thanks to cosmith71.

Repetier Server with Hyperpixel 4 touchscreen?

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