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Topic: White screen on 3.5 inch TFT (ili9327) with UTFT library (Read 59 times) previous topic - next topic

yop21

Hi everyone,

I received today my new 3.5 TFT touch screen but I can't make it work, the screen still white.

I'm using the UTFT library and a arduino mega.

This is my display: Display

On the shield of my display I have 8 data pins.

But I'm not sure about the connections. This is how I do:



I'm using the blue and green pins (this is the only pins I use).

For the code I use the example in arduino AVR and the UTFT_Demo_400x200.


So if somebody could tell me what I'm doing wrong, it would be nice  :)

Thank you for your help.
Yop

ricortes

IMHO: First step in debugging should be: See if you can read the chip ID properly. Just a little odd in that the display is 400x240 and the ILI9327 is listed as 432x240 in its datasheet. Not that it couldn't be right, just that vendors have a tendency to use the maximum specs to encourage sales so it seems a little odd.

Reason to check the chip ID is three fold.

1) You can't if your connections are wrong
2) You can't if it is a broken display
3) Vendors seem to be less then knowledgeable about their products.

I defer to the wisdom of Adafruit when someone reported the an unknown value for their display chip ID, 'Your display data lines are bad.' This was one for one of their own products so wiring and chip ID wasn't in question.


ricortes

I gave that library a quick look, so I could be very WRONG! Looking at the files I got the impression it was made for serial mode. At any rate, shouldn't be more then a couple of jumper changes to try that serial vs. 8 bit parallel.

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