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[on:]

Hey Guys !

I have a embarrassing  problem with my wonderful display ! !

So...

A have; Arduino Mega 2560 + TFT LCD Mega Shield V1.2 and 5" lcd ITDB02-5.0, lcd works on SSD1963 module.

I download latest library from henningkarlsen.com called UTFT -> install, change driver to -> myGLCD(ITDB50,.....)" or "myGLCD(SSD1963_800...)" I use the 38,39,40,41 pin 

and... WOW !!..

I got white screen ! ! !

I read a lot of posts and everything should be ok, please Guys HELP ME !!

shield link
http://www.elecfreaks.com/store/lcd-tft01-arduino-mega-shield-v14-p-214.html

lcd link
http://store.iteadstudio.com/index.php?main_page=product_info&products_id=542

[Reply #1 on:]

Just an overview....it appears you are on the right board, you are using the right library, and you have a good display. I do have one concern about the shield. Have you found others using this combination? The iteads use a shield with ICs to reduce voltage while the elecfreaks use resistors. Shouldn't be an issue but maybe something to look at.

[Reply #2 on:]

hi 997_1
I read your earlier posts about lcd's

Maby my Arduino is damaged, i see wired pins on the soldering microcontroler.

I made a small test for example led blink, I gave "HIGH" on pin 35, led is light up but also lights on pin 34 ...
very strange ...

SO..  i must order new arduino board

Maby buy a mega DUE so i have a question -> something like; pin mapping will be correct with the standard examples ?

I dont want any unnecessary problems on start lcd with ARM microcontroler

I greet you, the only one who You replied

[Reply #3 on:]

kamil,
I would be complete blown away if your Arduino was bad. I have never had a bad board and could estimate I have had 40-50 Arduinos.
In your blink example purposely place your pin 34 low and try your experiment again on pin 35 and 34.
Give me a few days and I will try my 5"itead on an elecfreak shield and let you know what happens.

[Reply #4 on:]

HI
I connectet electric meter and the pin is wired, closed circuit ...

About SHIELD:

When i buy shield , first im buy ITDB02 Arduino MEGA Shield v2.0 but dosnet work, i call to    
salesman.

The guy built a own my part setup  He did a few tests and said that this shield does not work with 4.3 and 5.0 lcd 1963 and send me elecfreaks v1.2 ...

so I think the shield is ok. nevermind

I read about DUE and i see the logic voltage is 3.3v so I will have to remove resistors on shield
and closed circuit and everything should be fine.

Am right ?

[Reply #5 on:]

i dont know if its irrelevant but i already wired the itdb5" (hooked with the mighty UTFT  Henning Karlsen library)  directly to my mega board and got the same white screen,
i was wondering if this issue is related to using/dumping the shield board
any suggestions ??

[Reply #6 on:]

Hi draconlord

You connected wires form LCD to mega board without resistors ?

[Reply #7 on:]

aah yeah i did i got a feeling that i did a disaster havent i  ,
do i have to put a resistor down each signal or just precised register ?
excuse my ignorance thats why i am asking the arduino guru's 

[Reply #8 on:]

MEGA operating voltage is 5v, your lcd is 3.3 v so u must put a 10k resistor down each signal you are use to lower voltage.

http://elecfreaks.com/store/download/datasheet/shield/TFT01_Mega_shield.pdf



997_1 my men,  where are you ? 

[Reply #9 on:]

ok but do you think it has anything to do with the white screen ??

[Reply #10 on:]

in your case I think that it

[Reply #11 on:]

UTDB02 5" utft + shield + Arduino DUE