How to set up cheap 3,5 inch touch display

Hardware
1

Hi everyone,

Just bought this;

Looks good and a friendly price!
When I select display in the webconfig and select Piscreen 3.5 screen V2, it starts working right away. Didn’t even have to rotate the screen in the settings. One little issue I found is, that the touchscreen is reversed left and right. Up and down works fine.

How can I reverse the touchscreen function?

2

Little he says . . . .shudders :smiley:

I’ve not tried the new touchscreen align admin option but I suspect it was written in frustration :smiley:

3

Hi,
first, you have to update zynthian software through the webconf. Our lovely team has added a touchscreen calibration tool recently wich will be accessible after reboot in the UI admin menu.
Keep us informed if it works well (or not).

4

Thanks le51,

just did the Update.
Screen calibration works fine in Admin, good work!!!
Problem solved.

Another hardwardish question; in Zynthian start up and powered down, the display goes white.
Is this fixable?

5

The only way i found of preventing it was to kill the supply to the display which gets a bit involved.

6

Ah, was afraid of that. Not a real issue, maybe a something for a future upgrade??

Another thing; I’m about to order the basic kit V2. By the looks of it. I’m missing a part.
There’s only one 40p header supplied. To connect the ribbon cable to the display, one needs to solder a 40p to the hifiberry, so I miss the one for the module kit.

Am I correct, if so can I order one extra?

7

Ok, got an extra 40p header supplied with my basic kitV2 order. GREAT SERVICE FROM THE ZYNTHIAN PEOPLE!!!

Now i’m getting to the next phase in completing my unit.
I tested my cheapo display directly on the raspberry, works great. Now I want to use the ribbon cable supplied with the basic kit to connect the display which is now build in my case.
Problem: the ribbon cable and the display both have female connectors!!

How do I make the connection, do I need some sort of male to male adaptor?
Where can I order these?

8

something like this ?

9

afbeelding

Thanks for the response LE51

Sadly enough that does not work, the display stays dark!
I measured with an ohmmeter what happens to the wiring. It seems that this adapter reserves the pin
order up and down! So pin 1 becomes 2, 2 becomes 1, 3 becomes 4, 4 becomes 3 etc.

So to use that properly, one has to change the position of the connector from top to bottom of the flatcable to restore the pin order

Anyone has experiance with this??