New 2.8" TFT Touch screen v2 not working with mega

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zendric
 
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New 2.8" TFT Touch screen v2 not working with mega

Post by zendric »

Hello, we are are group trying to get the 2.8" TFT touch screen (https://learn.adafruit.com/adafruit-2-8 ... -shield-v2) to work with an arduino Mega.
The Screen has been tested with a Arduino Uno, and it worked properly.
When we tried to use it with a Mega, we were not able to get a response via the screen.
When we run the graphictest, we get the following response:

"ILI9341 Test!
Display Power Mode: 0x0
MADCTL Mode: 0x0
Pixel Format: 0x0
Image Format: 0x0
Self Diagnostic: 0x0
Benchmark Time (microseconds)
Screen fill 2609740
Text 323776
Lines 3163776
Horiz/Vert Lines 227056
Rectangles (outline) 151192
Rectangles (filled) 5419868
Circles (filled) 1186976
Circles (outline) 1377632
Triangles (outline) 1004704
Triangles (filled) 2121996
Rounded rects (outline) 519400
Rounded rects (filled) 6075216
Done!"

So it seems like it is able to communicate.
Though there seems to be some communication, we are not able to get a black screen, or any response from the screen at all.

We have, as instructed in the manual, soldered the 3 ICSP jumpers, and a small line is cut in #11-#13 pads.

We hope that you are able to help us resolve this soon.

Best regards
Kenny Kristiansen

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adafruit_support_mike
 
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Re: New 2.8" TFT Touch screen v2 not working with mega

Post by adafruit_support_mike »

Could you post a photo of the underside of the shield please? Let's make sure the Mega-mods look like they should.

zendric
 
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Joined: Mon Apr 07, 2014 11:57 pm

Re: New 2.8" TFT Touch screen v2 not working with mega

Post by zendric »

Here is a picture of the shield as asked for.
Image
Best regards
Kenny Kristiansen

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adafruit_support_mike
 
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Re: New 2.8" TFT Touch screen v2 not working with mega

Post by adafruit_support_mike »

That looks perfectly standard. Double-check the continuity across the pads you cut to make sure there's no stray connection getting in the way,

Also try re-seating the flex cable in the connector. Sometimes those can work slightly loose, and a misaligned cable looks almost exactly like a normal one.

zendric
 
Posts: 4
Joined: Mon Apr 07, 2014 11:57 pm

Re: New 2.8" TFT Touch screen v2 not working with mega

Post by zendric »

We have tried to see if there was still a connection across the pads, but we were not able to get one.
We have also tried connecting it manually with wires, though it turned out with the same result, we were able to establish a connection but the screen was still only white.

Is there any way that we can use a Uno, but still be able to get 6 external inputs to the screen?
This is our exam project, so we are unfortunately we are running a little out of time, so any solution would be welcomed with open arms :)

Best regards
Kenny Kristiansen

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adafruit_support_mike
 
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Re: New 2.8" TFT Touch screen v2 not working with mega

Post by adafruit_support_mike »

If it works on the Uno, you can get both the TFT and access to the other pins using the Wingshield: https://www.adafruit.com/product/196

Since you seem to have done everything right and the TFT just isn't cooperating, let me offer you a deal: if you buy the Wingshield, we'll do next-day shipping at no extra cost. That way you won't lose any more time.

Send a note to [email protected] with your order number and a link to this thread, and the folks there will make it all work for you.

zendric
 
Posts: 4
Joined: Mon Apr 07, 2014 11:57 pm

Re: New 2.8" TFT Touch screen v2 not working with mega

Post by zendric »

Sadly enough, our exam project has a fixed fund, and we are already over our limit.
For the wingshield, i am not sure how that would work. We are in need of a way, that would make us 3 extra inputs and 3 extra digial outputs.

Best regards
Kenny Kristiansen

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adafruit_support_mike
 
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Re: New 2.8" TFT Touch screen v2 not working with mega

Post by adafruit_support_mike »

Well, you seem to have done everything right, so I'm going to assume there's some kind of problem with the signal routing on the shield.

Send a note to [email protected] with a link to this thread and the folks there will get you a replacement.

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