3.5" TFT Screen does not work

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o_spengler
 
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3.5" TFT Screen does not work

Post by o_spengler »

I am trying to setup the Adafruit 3.5" TFT touchscreen on a raspberry pi 4 and am getting nowhere.
I followed the instructions on this link, including an attempt using the pin kernal fix linked at the top.
https://learn.adafruit.com/adafruit-pit ... -install-2

However, no matter what I end up with no display on the screen, and a bizarre result on the HDMI of two duplicated displays next to each other in the top half, with nothing on the bottom (imagine a screen divided into quarters). The colors are inverted in the top half.

What is going on here?

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o_spengler
 
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Re: 3.5" TFT Screen does not work

Post by o_spengler »

Having spent several additional days on this I cannot find a solution. Tried older versions of the OS, various changes to the configuration. I have found other people complaining about this. If these screens no longer work with the Pi why are you still selling them?

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Franklin97355
 
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Re: 3.5" TFT Screen does not work

Post by Franklin97355 »

Does the HDMI display not work with other sources of input?

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o_spengler
 
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Re: 3.5" TFT Screen does not work

Post by o_spengler »

Works fine for other sources, including the Pi without the Adafruit driver installed.
What I am getting is very similar to this
https://imgur.com/a/DrdpNDd

As seen in this thread
viewtopic.php?f=47&t=177513&p=878923#p878923

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adafruit_support_carter
 
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Re: 3.5" TFT Screen does not work

Post by adafruit_support_carter »

Was the HDMI output normal prior to running the TFT install script?

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o_spengler
 
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Re: 3.5" TFT Screen does not work

Post by o_spengler »

Yes HDMI output was normal prior to running the script.

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adafruit_support_carter
 
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Re: 3.5" TFT Screen does not work

Post by adafruit_support_carter »

Do you remember what options you picked for installing? If you used the command line option:
https://learn.adafruit.com/adafruit-pit ... -3074227-9
what was the full command line you used?

If you used the interactive option:
https://learn.adafruit.com/adafruit-pit ... 2982154-38
which options did you pick?

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o_spengler
 
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Re: 3.5" TFT Screen does not work

Post by o_spengler »

I tried it both ways. Command line was

Code: Select all

sudo python3 adafruit-pitft.py --display=35r --rotation=90 --install-type=fbcp
Interactive was for the same setup, although once I used rotation 270 since that is how I wanted the screen

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adafruit_support_carter
 
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Re: 3.5" TFT Screen does not work

Post by adafruit_support_carter »

Thanks. That seems fine. What is the behavior of the TFT if you boot *without* anything attached to HDMI?

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o_spengler
 
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Re: 3.5" TFT Screen does not work

Post by o_spengler »

Not sure, will test later today.

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adafruit2
 
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Re: 3.5" TFT Screen does not work

Post by adafruit2 »

did this get resolved? its a weird one!

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o_spengler
 
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Re: 3.5" TFT Screen does not work

Post by o_spengler »

Nope, this never got resolved.
I was in the process of moving and did not have time or the ability to interact with the pi for a bit, but I did a fresh test tonight and as of tonight it is still broken.

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o_spengler
 
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Re: 3.5" TFT Screen does not work

Post by o_spengler »

adafruit2 wrote:did this get resolved? its a weird one!
Nope still broken, and even the "The last known for-sure tested-and-working version is December 4, 2020 " does not actually work.

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