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dmydlack avatar image
dmydlack asked

Touchscreen Calibration very basic

Hello,

I am running Venus OS on a Pi4 - I can make the GIU display on a standard desktop monitor.

I am attempting to now display instead on a local 7” touchscreen:

(JUN-ELECTRON Portable Monitor with Acrylic Case 7 inch Screen - IPS Capacitive Display 1024x600 - Compatible for Raspberry Pi 4)


The Victron GUI does successfully display on the touchscreen but is I think ‘uncalibrated’ (completely offset) from the touch and is unusable.


The touchscreen manufacturer has instructions on their wiki to add these commands to the config.txt file:


max_usb_current=1

hdmi_force_hotplug=1

config_hdmi_boost=7

hdmi_group=2

hdmi_mode=87

hdmi_drive=1

display_rotate=0

hdmi_cvt 1024 600 60 6 0 0 0


I think I did this correctly (I checked to see that it was saved.)


I have rebooted and tried repeatedly but I have had no change in the Venus OS GUI touch miscalibration.


I have read on the Victron community forum something about 'calibration.' There is mention of using RpiDisplaySetup. I looked it up on Github and there it mentions first installing SetupHelper (also on another Github page.)


So, I'm a bit stuck in that I do not really know how to install SetupHelper so that I can then Install RpiDisplaySetup so I can then attempt to 'calibrate' my touchscreen to my Rpi Venus OS.


If it were a matter of typing commands into the config.txt file I can do that (I've confirmed that I have done that before.)


I bet this is really basic - 'installing SetupHelper and RpiDisplaySetup.

Just need a pointer on how.

Thank you!

touchscreen
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dmydlack avatar image dmydlack commented ·

I have typed in the command:

which ts_calibrate

I get no response from the command line.

(I have successfully disabled the GUI by entering the command:

touch /etc/venus/headless

I can confirm that the Venus GUI no longer displays on the touchscreen. Instead I see the command line interface.)


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2 Answers
dmydlack avatar image
dmydlack answered ·

IT WORKED!


I successfully calibrated my 7” touchscreen


I turned off the GUI:

touch /etc/venus/headless


I rebooted


I installed opkg update:

Opkg update


I installed:

Opkg install tslib-calibrate


I rebooted


I ran ts calibrate:

ts_calibrate


The touchscreen calibration procedure ran - I pointed to a few crosshair targets.


I rebooted


I turned the GUI back on:

rm /etc/venus/headless


I rebooted


SUCCESS! Touch now calibrated with the GUI.


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zenrider avatar image
zenrider answered ·

For anyone else struggling to get these commands to work, there are 2 typo's in the instructions above.

But apart from that, thank you very much for the contribution, it helped me a lot.

"Opkg update" has a capital "O" at the beginning, and this needs to be lower case

and

"Opkg install tslib-calibrate" has a capital "O" at the beginning, and this needs to be lower case



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