4DPi-24-HAT kernel for Debian Stretch (and/or Buster)

[Daniac]

I installed this: (note, this is all I installed, I used my original updated stretch image, not a custom image from 4d)
$ wget http://www.4dsystems.com.au/download...35_v1.0.tar.gz
$ sudo tar -xzvf 4d-hats_4-9-35_v1.0.tar.gz -C /

to my pi zero running stretch and followed the instructions to get it going however I am having an issue with applications being way oversized. It appears like the screen is only showing the upper left hand corner (about 25%) of a much larger screen. I did change the menu to small icons so now all of the icons show on the screen but if I open an application, the window is so big I can only see 25% of the application and in some cases cannot scroll over to close the window.

What am I doing wrong ?

[PeterPablo]

Hi Peter,

it should be possible to compile a 4.9 kernel using sources form https://bitbucket.org/4DPi/4d-hats/. Except for the pwmbl module, which will not be supported any more in the future. There are also new sources attached, which support newer displays that are not being sold yet. These were used to build the http://www.4dsystems.com.au/download...59_v1.1.tar.gz kernel package. Please remove the .txt extension; attachment is a .tar.gz, but forum did not allow me to upload a file with a .gz extension.

Regards,
Andrej

Dear Andrej,
thank you for providing the sources. I successfully compiled my own kernel 4.9.76-v7+ (based on commit https://github.com/raspberrypi/linux...abbc9bd5adaed6). I had to copy the device tree compile script dtc.sh and the device tree overlay source 35-hat.dts from https://bitbucket.org/4DPi/4d-hats/src.

Kind regards
Peter

[frsantiago]

Hi Alex,

Welcome to the forum.

Raspbian release 2017-11-29 should work with gen4-hats_4-9-59_v1.1.tar.gz on Raspberry Pi 2.
Open a new Ticket on http://www.4dsystems.com.au/support regarding on your 4DPi-24HAT white screen issue.

Thank you.

BR,

[Alex Rasp]

Hi. Have 4dpi-24-hat hw rev1.02 on my Raspberry 2. Any chance to work with latest Raspberian 2.2 - nov 2017 ?
Tryed 4d-hats_4-9-35_v1.0.tar.gz with many correction from net - no success, white screen (no pwm mode), hdmi monitor show last message - rc.local
Try gen4-hats_4-9-59_v1.1.tar.gz with comented #dtoverlay=4dpi-43ct , white screen (no pwm mode), hdmi monitor show last message "My IP address is..." from rc.local.

If someone get victory with this lcd on rasp 2 please help. Thank you.

correction:
looked at post http://forum.4dsystems.com.au/forum/...0663#post60663

and intall 2017-09-07-raspbian-stretch.img
tryed 4d-hats_4-9-35_v1.0.tar.gz and gen4-hats_4-9-59_v1.1.tar.gz with commented #dtoverlay=4dpi-43ct
no success

So question,
what version of raspberian i must install for good working Raspi 2B ?
or what I must do for good work on 2017-11-29-raspbian-stretch.img

Thank you

[lbendlin]

Yes, that worked for me too, in non-pwm mode. However in pwm mode the screen is blank (the touchscreen works after the usual downgrade to SDL wheezy). The brightness control doesn't accept any values beyond 31, but none of these commands bring the display to life. Any guidance?

[strancara]

Found a mistake in /boot/config.txt:

# uncomment one of the ovrelays if loading from EEPROM is not supported
#dtoverlay=4dpi-32
#dtoverlay=4dpi-35
#dtoverlay=24-hat
#dtoverlay=32-hat
#dtoverlay=35-hat
#dtoverlay=35b-hat
#dtoverlay=4dpi-43
dtoverlay=4dpi-43ct
#dtoverlay=4dpi-50
#dtoverlay=4dpi-50ct
#dtoverlay=4dpi-70
#dtoverlay=4dpi-70ct

dtoverlay=4dpi-43ct should be commented out. It worked for me when after commenting it out;

#dtoverlay=4dpi-43ct

[lbendlin]

With 4-9-35 after powering up the backlight comes on but the screen stays dark until the console messages start showing at the very end of the startup process.
With 4-9-59 the backlight comes on, the screen goes white, and after a while both backlight and screen seemingly turn off. No console messages at any time. I haven't tried anything pygame after that.

[strancara]

4-9-59 should work with latest Raspbian Stretch. What kind of problems are you experiencing?

[lbendlin]

4-9-59 does not work with Raspbian Stretch. 4-9-35 works, but only in non-pwm switch setting. The command is also different from the datasheet

sudo bash -c "echo 1 > /sys/class/backlight/4d-hats/brightness"

Except for the pwmbl module, which will not be supported any more in the future.

Why would you remove this useful functionality?

[strancara]

Hi Peter,

it should be possible to compile a 4.9 kernel using sources form https://bitbucket.org/4DPi/4d-hats/. Except for the pwmbl module, which will not be supported any more in the future. There are also new sources attached, which support newer displays that are not being sold yet. These were used to build the http://www.4dsystems.com.au/download...59_v1.1.tar.gz kernel package. Please remove the .txt extension; attachment is a .tar.gz, but forum did not allow me to upload a file with a .gz extension.

Regards,
Andrej

[PeterPablo]

Dear James,

thank you for your quick reply. Unfortunately access to your new bitbucket repository is restricted. My username on bitbucket is PPDMDE in case you can give me access? Since my project uses further kernel modifications I can't simply make use of your current testing kernel pack.

Thank you
Peter

[James_4DSystems]

Hi Peter

There is a new repo which is being used, as we have new modules coming out in the new year. You can use this to generate source for the current modules though.

https://bitbucket.org/4DPi/gen4-hats

and here is the current built kernel pack which is available for public testing. This will be made official soon.

http://www.4dsystems.com.au/download...59_v1.1.tar.gz

I hope that helps

Regards

[PeterPablo]

Dear pauleilio,
thank you for providing the tar. Do you plan on updating the sources at https://bitbucket.org/4DPi/4d-hats/ for compatibility with kernel 4.9.z so we can compile our own kernel? (ref. http://forum.4dsystems.com.au/forum/...anch-rpi-4-9-y)
Best regards
Peter

[TRP]

Yep, it worked once I moved the jumper. I used this 4DPi-24-HAT on a different RPi several years ago, and it worked fine with the jumper in the other position. I didn't notice it mentioned in the manual, guess I missed it.

Thanks,
Tom

[pauleilio]

Hello,

Welcome to the forum.

This should work with Stretch

On terminal:
$ wget http://www.4dsystems.com.au/download...35_v1.0.tar.gz
$ sudo tar -xzvf 4d-hats_4-9-35_v1.0.tar.gz -C /

Please make sure the jumper is set to the ON/OFF position

Best regards,

Paul