Hyperpixel 4 Touchscreen stopped working

Forum for discussion about the Langstone Microwave Transceiver that shares some features with the Portsdown. Wiki: https://wiki.microwavers.org.uk/Langstone_Project
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m5mat
Posts: 2
Joined: Mon Mar 07, 2022 10:09 pm

Hyperpixel 4 Touchscreen stopped working

Post by m5mat » Mon Mar 07, 2022 10:13 pm

Hello All,

I started building a Langstone during one of the lockdowns and it's been in the cupboard for a while. I've got it back on the workbench and updated the software (./stop, ./update, reboot) - it all works with the exception of the touchscreen portion Hyperpixel display, which was working fine before the update. Any idea why it might have stopped?

Matt
M5MAT

g4eml
Posts: 673
Joined: Thu Apr 26, 2018 9:36 am

Re: Hyperpixel 4 Touchscreen stopped working

Post by g4eml » Tue Mar 08, 2022 4:32 pm

Updating shouldn’t affect the touch screen.
It is possible the screen rotation has got changed.
Make sure there is a line ‘display_lcd_rotate=3‘ in /boot/config.txt.

You could also try running HW_test which should report any screen touches.


Colin G4EML.

g0mjw
Posts: 2327
Joined: Sat Sep 20, 2014 9:15 am

Re: Hyperpixel 4 Touchscreen stopped working

Post by g0mjw » Tue Mar 08, 2022 5:37 pm

It might be something to do with the IO use. That screen is only supported by the Langstone, not the Portsdown, so it's not going to be a conflict with Dave's updates.

Mike

g4eml
Posts: 673
Joined: Thu Apr 26, 2018 9:36 am

Re: Hyperpixel 4 Touchscreen stopped working

Post by g4eml » Tue Mar 08, 2022 7:25 pm

It certainly won’t work with Portsdown. The display uses most of the IO. Langstone disables its IO use when it detects the hyperpixel display.

The touchscreen uses I2C.

m5mat
Posts: 2
Joined: Mon Mar 07, 2022 10:09 pm

Re: Hyperpixel 4 Touchscreen stopped working

Post by m5mat » Tue Mar 08, 2022 9:13 pm

Well, I fired it up to start troubleshooting... and it just worked. No idea why it wasn't working before it seems to be ok now. Thanks all anyway!

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