2.8 Inch TFT Shield - Unknown Chipset identification 0x1325

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SaW3r
 
Posts: 3
Joined: Fri Jul 12, 2013 6:14 am

2.8 Inch TFT Shield - Unknown Chipset identification 0x1325

Post by SaW3r »

Hi,

I bought this product a few days ago on your site and I followed this great tutorial but the graphicstest software did return an unknow chipset with following messages:

Code: Select all

TFT LCD test
Using Adafruit 2.8" TFT Arduino Shield Pinout
Unknown LCD driver chip: 1325
If using the Adafruit 2.8" TFT Arduino shield, the line:
  #define USE_ADAFRUIT_SHIELD_PINOUT
should appear in the library header (Adafruit_TFT.h).
If using the breakout board, it should NOT be #defined!
Also if using the breakout, double-check that all wiring
matches the tutorial.
I use version 1.0.5 Arduino and a board Arduino Duemilanove with an ATmega328.
I tried to hardcode the id to 0x1325 and the program starts well but the screen stays white.
I installed the libraries provided in the tutorial and uncommented line in the file Adafruit_TFTLCD.h.


I tried everything ...


Can you help me please?

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adafruit_support_rick
 
Posts: 35092
Joined: Tue Mar 15, 2011 11:42 am

Re: 2.8 Inch TFT Shield - Unknown Chipset identification 0x1325

Post by adafruit_support_rick »

You have a bad connection on one of the data lines. You should be reading 0x9325 instead of 0x1325. That is a difference of 1 bit in the high order digit (0x1 = 0001, 0x9=1001).

Make sure the shield pins are fully inserted into your arduino, so that they are making solid contact. If you can, please post a clear, detailed, focused picture of the bottom side of the shield so that we can check the pins. A picture of the shield connected to your arduino may also be helpful

SaW3r
 
Posts: 3
Joined: Fri Jul 12, 2013 6:14 am

Re: 2.8 Inch TFT Shield - Unknown Chipset identification 0x1325

Post by SaW3r »

Thank you for your quick response but I also had a few times the id 0x1301 or 0x1305.
You still think the error is due to a bad contact?

Here are two photos :
Image
Image

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pburgess
 
Posts: 4161
Joined: Sun Oct 26, 2008 2:29 am

Re: 2.8 Inch TFT Shield - Unknown Chipset identification 0x1325

Post by pburgess »

Say, is that an Arduino Duemilanove? This might be narrowing in on a chip ID bug that's been vexing us for the longest time.

If by chance you have access to an Arduino Uno, could you test there and see if there's any difference? I've got a Duemilanove somewhere, need to tear the house apart now...

SaW3r
 
Posts: 3
Joined: Fri Jul 12, 2013 6:14 am

Re: 2.8 Inch TFT Shield - Unknown Chipset identification 0x1325

Post by SaW3r »

Thank you pburgess, I just changed my Arduino Duemilanove and it works.

So the problem just came from my other board that was defective.

Thank you all !

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pburgess
 
Posts: 4161
Joined: Sun Oct 26, 2008 2:29 am

Re: 2.8 Inch TFT Shield - Unknown Chipset identification 0x1325

Post by pburgess »

Your board's probably not defective...there's a part of the code that's just very fussy and temperamental about timing, and every board's just a tiny bit different in that regard. I'm working on some changes to the code right now that might help clear this up...I might ask for your help later testing it, if you can spare a moment.

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